WO2007029718A1 - 有機色素固体レーザー - Google Patents
有機色素固体レーザー Download PDFInfo
- Publication number
- WO2007029718A1 WO2007029718A1 PCT/JP2006/317582 JP2006317582W WO2007029718A1 WO 2007029718 A1 WO2007029718 A1 WO 2007029718A1 JP 2006317582 W JP2006317582 W JP 2006317582W WO 2007029718 A1 WO2007029718 A1 WO 2007029718A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- excitation
- organic dye
- organic semiconductor
- laser
- state laser
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/30—Structure or shape of the active region; Materials used for the active region
- H01S5/36—Structure or shape of the active region; Materials used for the active region comprising organic materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/12—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/168—Solid materials using an organic dye dispersed in a solid matrix
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/0014—Measuring characteristics or properties thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/041—Optical pumping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/18—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities
- H01S5/185—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only horizontal cavities, e.g. horizontal cavity surface-emitting lasers [HCSEL]
- H01S5/187—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only horizontal cavities, e.g. horizontal cavity surface-emitting lasers [HCSEL] using Bragg reflection
Definitions
- the present invention relates to an organic dye solid-state laser in which amplified self-oscillation occurs by external excitation light.
- Optical property parameters for causing ASE by an organic semiconductor include a quantum yield, a radiation rate constant (kr) obtained from a luminescence lifetime, and the like. kr is thought to be proportional to the oscillator strength (OS) obtained from the area of the absorption spectrum.
- OS oscillator strength
- styrylbenzene derivatives for which ASE has a low threshold, have been studied as materials for use in a laser active layer.
- SBD styrylbenzene fluorescent material
- CBP 4,4, - ⁇ , tan dicarbazole-biphenyl
- BAB bis-Styrylbenzene derivatives
- Non-Patent Document 1 Kazu Nakano et al., Proceedings of the 52nd Joint Conference on Applied Physics No.3, 1 a-YG-5, p.1490.
- Non-Patent Document 2 T. Aimono et al, Appl. Phys. Lett. 86, 071110 (2005)
- an object of the present invention is to provide an organic dye solid-state laser that continuously oscillates by irradiation of continuous excitation light such as a He—Cd laser, a CW ultraviolet semiconductor laser, or a xenon lamp.
- the present inventors have substantially eliminated the loss due to absorption of excited states in singlet and triplet excited states in an organic semiconductor thin film, that is, in the excited level. According to the organic semiconductor material in which excitation absorption does not exist, the inventors have obtained the knowledge that the amplified self-oscillation occurs due to continuous light excitation, and have completed the present invention.
- the organic dye solid-state laser of the present invention comprises a substrate and a resonator structure comprising an organic semiconductor thin film formed on the substrate, and the organic semiconductor thin film comprises: It is an organic semiconductor material with a high emission quantum yield and substantially no excitation absorption at the excitation level, and is a bisstyryl derivative represented by the general formula (1) or the general formula (2) In which an amplified self-oscillation is continuously obtained by irradiation with excitation light.
- Y 1, X, and Y are each a substitution composed of an aromatic compound or an aliphatic compound.
- R force R is an alkyl group
- n is an integer of 0 or more.
- the resonator structure made of an organic semiconductor thin film is preferably a waveguide or a diffraction grating force.
- the bisstyryl derivative is preferably BSB-Cz (4,4 and bis [(N-carbazole) styryl] biphenyl), and the triphenylamine derivative is preferably TPD (N, N'-diphenyl-N, N '-(3-methylphenyl) -1, 1, biphenyl) -4, 4, diamine).
- the bisstyryl derivative or triphenylamine derivative is preferably added to the host molecule. This host molecule is preferably CBP (4,4′-N, N and dicarbazole-biphenyl).
- an organic dye solid-state laser that has a simple structure and amplifies self-oscillation by external excitation light that is a low-energy continuous wave.
- FIG. 1 is a schematic perspective view showing the structure of an organic dye solid-state laser of the present invention.
- FIG. 2 is a perspective view schematically showing a resonator structure of the laser medium part shown in FIG.
- FIG. 3 is a partial cross-sectional view of the diffraction grating of FIG. 2 along the XX direction.
- FIG. 4 is a perspective view schematically showing a modification of the resonator structure of the laser medium portion shown in FIG.
- FIG. 5 is a schematic diagram showing a resonator structure of the laser medium portion shown in FIG. 1.
- FIG. 6 is a partial cross-sectional view of the circular diffraction grating of FIG. 5 along the XX direction.
- FIG. 7 is a diagram schematically showing an apparatus for measuring the excitation absorption characteristics of BSB-Cz and TPD.
- FIG. 8 is a diagram showing the light absorption cross section ⁇ abs, stimulated emission cross section ⁇ em of BSB-Cz used in Example 1, and the excitation absorption characteristics at the excitation level.
- FIG. 9 is a diagram showing excitation absorption characteristics at the excitation level of TPD used in Example 2.
- FIG. 10 is a graph showing absorption light characteristics, photoluminescence spectrum, and emission spectrum of external excitation light of an organic dye solid-state laser having a film thickness of lOOnm according to Example 1.
- FIG. 11 is a graph showing the excitation light intensity dependence of the emission intensity by pulsed nitrogen gas laser excitation of an organic dye solid-state laser having a film thickness of 1 OO nm according to Example 1.
- FIG. 12 is a diagram showing a light emission vector due to external excitation light of an organic dye solid-state laser whose film thickness is changed in Example 1.
- FIG. 13 is a diagram showing an emission spectrum of the organic dye solid-state laser having a film thickness of 500 nm in Example 1 by external excitation light.
- FIG. 14 is a graph showing the dependence of the emission intensity of the organic dye solid-state laser having a film thickness of 500 nm in Example 1 on the excitation light intensity of the He—Cd continuous wave laser excitation.
- FIG. 15 is a graph showing the excitation light intensity dependence of the emission intensity on the higher excitation light intensity side.
- FIG. 16 is a diagram schematically showing a method for measuring polarization characteristics.
- FIG. 17 is a diagram showing the polarization characteristics of ASE by He—Cd continuous wave laser excitation of an organic dye solid-state laser having a film thickness of 500 nm in Example 1.
- FIG. 18 is a graph showing the excitation light intensity dependence of the emission intensity of the organic dye solid-state laser according to Example 2 excited by He—Cd continuous wave laser.
- FIG. 19 shows the emission spectrum of the organic dye solid-state laser according to Example 2 shown in FIG. 18.
- (A) is 210 mW / cm 2 and (B) is 20950 mW / cm 2 ( The emission spectrum in the case of about 21 WZcm 2 ) is shown.
- FIG. 1 is a schematic diagram showing the structure of the organic dye solid-state laser of the present invention.
- the organic dye solid-state laser 1 is composed of a laser medium unit 10 and an excitation light source unit 15 each made of an organic semiconductor thin film 3 formed on a substrate 2.
- This organic semiconductor thin film 3 The laser medium section 10 has a resonator structure composed of a force such as a diffraction grating or a waveguide.
- the organic semiconductor thin film 3 can be configured by setting the film thickness to a predetermined thickness t.
- the thickness t is ⁇ !
- a waveguide structure can be obtained by setting it to ⁇ 10 m.
- a resonator structure using a diffraction grating will be described as the resonator structure.
- FIG. 2 is a perspective view schematically showing the resonator structure of the laser medium unit 10 shown in FIG. 1, and FIG. 3 is a partial sectional view of the diffraction grating of FIG. 2 along the XX direction.
- the organic semiconductor thin film 3 formed on the substrate 2 is a distributed feedback (hereinafter referred to as DFB) resonator made of a diffraction grating. It has a structure. As shown in FIG. 3, the period ⁇ of the diffraction grating is the sum of the widths of the convex portion 3A and the concave portion 3B having a depth h. The period ⁇ of the diffraction grating of the DFB resonator may be determined according to the desired oscillation frequency. Depth h should be about 2 to: LOOnm.
- FIG. 4 is a perspective view schematically showing a modification of the resonator structure of the laser medium portion of the present invention.
- the organic semiconductor thin film 3 formed on the substrate 2 is a so-called distributed Bragg reflection type (distributed Bragg reflection type) in which the diffraction grating shown in FIG. 3 is provided at both ends.
- reflector hereinafter referred to as “DBR” where appropriate.
- DBR distributed Bragg reflection type
- L and L at both ends are reflectors, and the center L is the gain region.
- the period ⁇ of the diffraction grating of this DBR resonator may be determined according to the desired oscillation frequency.
- the emission direction of the laser light is the X direction in FIGS.
- FIG. 5 is a diagram schematically showing a resonator structure different from the laser medium portion 10A
- FIG. 6 is a partial sectional view of the circular diffraction grating in FIG. 5 along the XX direction.
- the organic semiconductor thin film 3 formed on the substrate 2 has a circular diffraction grating formed on the outer periphery of the convex portion 3C having a diameter R at the center.
- the period ⁇ of the diffraction grating is defined by the convex part 3D of the ring and the concave part 3A of the ring with the depth h. Is the sum of the widths.
- the period ⁇ of this diffraction grating may be determined according to the desired oscillation frequency. Depth h should be about 2 to: LOOnm.
- the diameter of the convex portion 3C can be 1Z2 or twice that of the periodic person.
- the external pumping light source unit 15 includes a pumping light source 16, an attenuator 17 that also has an ND filter equal power, a shutter 18, and a lens 1 for condensing light from the external pumping light source onto the laser medium unit 10. 9 and is configured.
- the laser beam 12 is emitted.
- the organic semiconductor thin film 3 used in the present invention is represented by the following chemical formula (1) as a laser material having a high emission quantum yield and little or no excitation absorption at the excitation level.
- the bisstyryl derivative or the trifuramin derivative represented by the chemical formula of the following formula (2) can be preferably used.
- a bisstyryl derivative or a triphenylamine derivative may be added to the host molecule.
- the organic semiconductor thin film 3 is generically referred to as having no or almost no excitation absorption at the excitation level, and is referred to as having substantially no excitation absorption at the excitation level.
- the organic semiconductor thin film 3 is preferably a material having a high quantum efficiency in photoluminescence (PL absolute quantum efficiency, hereinafter referred to as ⁇ PL), that is, a high emission quantum yield.
- ⁇ PL quantum efficiency in photoluminescence
- Ether threshold value of amplified self-oscillation, it is necessary to improve the fluorescence quantum efficiency and the fluorescence lifetime.
- Y 1, X, and Y are each a substitution composed of an aromatic compound or an aliphatic compound.
- R force R is an alkyl group
- X is a substituent such as 4,4'-biphenylene, 1,4 phenol, 2,5 dicyanol 1,4 phenylylene, 2,5-methoxy-1,4-phenylene, etc. can do.
- C48H40N2 Benzenamine, 4,4 '-(1,4-phenylenedi-2, l-ethenediyl) bis [N- (3-methylphenyl) -N-phenyl- ( 9CI)
- X 1,4-fullerene
- Y Y force [phenyl (3-methylphenol)] aminophenol [Chemical 4]
- C50H44N2 (4- (Di-p-Tolylamino) -4 ′-[(di-p-tolylamino) styryl] stilbene) represented by the following formula (5) can be used.
- C52H42N4 04 (1,4-Benzenedenedicarbonitrile 2,5-bis [2— [4— [bis (4-methoxyphenyl) amino] phenyl] ethenyl] — (9 I)
- the bisstyryl derivative is represented by the following formula (7): C50H44N2 02 (1,4-dimet hoxy— 2,5—bis [p— (N—pheny to N— (m—toryl) amino) —styryl] benzene , (BSB-OMe)) can be used.
- C55H46N2 (4,4′-Bis [4- (di-p-tolylamino) styryl] biphenyl) represented by the following formula (8) can be used.
- Enil is an amino file.
- Triphenylamine derivatives are represented by the following formula (9): ⁇ , ⁇ , —bis (3-methylphenyl)) — ⁇ , ⁇ , diphenyl (1-1, biphenyl) 4-4, One diamine ( ⁇ , ⁇ dipheny N, ⁇ (3-methylphenyl) -1,1, and biphenyl) -4,4, also called diamine, TPD) can be used.
- Eth 0.32 ⁇ 0.1 ⁇ / cm, which is the organic semiconductor material showing the lowest threshold value among the styryl fluorescent materials examined so far.
- the oscillation wavelength (ASE) for amplification self-oscillation is 421 nm.
- BSB—Cz or TPD may be doped in CBP (4, 4′—N, N, one dicarbazole one-biphenyl) of an organic semiconductor material represented by the following formula (10).
- CBP becomes a host molecule
- BSB-Cz or TPD becomes a guest molecule.
- the host molecule is a material having a larger band gap than the guest molecule.
- the concentration of BSB-Cz in the host molecule is basically that the lower the dopant concentration, the higher the luminous efficiency because the concentration quenching is suppressed.
- the concentration of BSB-Cz or TPD is about 1 to 20% by weight, preferably 3 to: LO% by weight, and particularly preferably 6% by weight.
- the organic semiconductor thin film 3 can be deposited on the substrate 2 by an ordinary thin film forming method such as a vapor deposition method, a sputtering method, a CVD method, a laser ablation method, an MBE method, or a spinner ink jet.
- a wet film formation method using can be used.
- Light exposure, EB exposure, or the like can be used for a mask process for forming a predetermined-shaped waveguide or diffraction grating pattern.
- the grooves of the diffraction grating can be formed by various etching methods.
- ASE occurs when the excitation light source 16 is irradiated from the external excitation light source unit 15.
- an organic semiconductor material having a high emission quantum yield and substantially no excitation absorption at the excitation level is used, laser light can be obtained by continuous wave excitation.
- Various lasers can be used as the excitation light source 16. Examples of such a continuous wave excitation light source 16 include a He Cd laser and a semiconductor laser diode.
- the excitation light source 16 is a continuous wave (CW)
- the organic dye solid-state laser 1 of the present invention is a CW laser.
- TPD a commercially available drug was used.
- an excitation absorption characteristic measuring apparatus 20 for an organic semiconductor includes a reference light source 22 that irradiates a sample 21 made of an organic semiconductor in the right direction with a left force on the paper surface, and an excitation light source 23 that excites the sample 21. And a spectroscope 24 on which light transmitted through the sample is incident, and detection means 25 for detecting a transient signal detected by the spectroscope 24.
- a solution obtained by dissolving the material to be the organic semiconductor thin film 3 in an organic solvent can be used. Tetrahydrofuran (THF) was used as the organic solvent, and the concentration of the solution was adjusted so that the optical density (Optical Density) was 1 to 2 at the excitation wavelength.
- THF Tetrahydrofuran
- the reference light source 22 uses a xenon (Xe) lamp (L8004, manufactured by Hamamatsu Photonics Co., Ltd.), which is a white continuous light source, with an output of 150 W, and the excitation light source 23 has a pulse with Nd 3+
- Xe xenon
- the third harmonic (wavelength: 355 nm) of a laser Spectra's Fijitas Corporation, INDI-40-10-HG
- an oscilloscope can be used as the detection means 25 as long as it can detect an electrical signal on the time axis.
- the excitation and absorption characteristics of the sample 21 that also has organic semiconductor power can be obtained by irradiating the white light source 22 that is a continuous wave in synchronization with the pulse laser 23 that is the excitation light source and measuring the time change of the absorbed light. .
- the decaying in a short time is -singlet singlet absorption
- the decaying in a long time is triplet singlet absorption.
- FIG. 8 is a diagram showing the light absorption cross section ⁇ abs, the stimulated emission cut-off area ⁇ em, and the excitation absorption characteristics at the excitation level of BSB-Cz used in Example 1 of the present invention.
- the horizontal axis indicates the wavelength (nm)
- the left vertical axis indicates the optical absorption cross section ⁇ abs
- the stimulated emission cross section ⁇ em (10 16 cm 2 )
- the right axis indicates the excitation absorption characteristics at the excitation level ( (Optional scale).
- the figure also shows an ASE spectrum of an example described later.
- the light absorption cross section ⁇ abs becomes large when the wavelength is about 400 nm or less. It can be seen that the stimulated emission cross section ⁇ em increases near the ASE oscillation wavelength.
- the excited absorption characteristics at the excited level are the excited state absorption power ASE in the excited state of singlet-singlet (see S 1 S in Fig. 8) or triplet singlet triplet (see T 1 T in Fig. 8). It was found that there was almost no peak wavelength around 462 nm.
- FIG. 9 shows the excitation absorption characteristics at the excitation level of the TPD used in Example 2 of the present invention. It is a figure. In the figure, the horizontal axis indicates the wavelength (nm), and the vertical axis indicates the excitation absorption characteristic (arbitrary scale) at the excitation level. The figure also shows the PL and ASE spectra of Example 2 described later.
- the excitation absorption characteristics at the excitation level in TPD are singlet singlet (see S-S in Fig. 9) and triplet singlet (see T-T in Fig. 9). It has been clarified that there is almost no absorption in the excited state at 425 nm, which is the peak wavelength of ASE.
- An organic semiconductor film 3 having BSB-Cz or TPD described in Examples 1 and 2 as guest molecules and CBP as host molecules was formed on a 1 mm thick quartz glass substrate 2 by co-evaporation. .
- the concentration of BSB-Cz or TPD was varied from 1 to 20 wt%.
- the film thickness was varied from 100 nm to 500 nm.
- the quartz glass substrate 2 was cut into 5 mm ⁇ 25 mm to form a laser medium part 10.
- a continuous wave He—Cd laser (wavelength: 325 nm) was used as the excitation light source 16 of the excitation light source unit 15.
- FIG. 10 is a diagram showing an absorption spectrum, a photoluminescence spectrum, and an emission spectrum of the organic dye solid-state laser 1 having a film thickness of lOOnm of Example 1 by external excitation light.
- the horizontal axis represents normalized absorption wavelength or emission wavelength (nm), and the vertical axis represents absorbance or emission intensity (arbitrary scale).
- the external excitation light was irradiated in a nitrogen atmosphere.
- a pulse excitation light source 16 for external excitation light a nitrogen gas laser (337 nm) having a pulse width of 500 ps and a repetition frequency of 10 Hz was used.
- the organic dye solid-state laser 1 having a film thickness of lOOnm showed light absorption at a wavelength of about 400 nm or less, and the PL peak wavelength ( ⁇ FLU) was 435 nm. It was found that amplified self-oscillation occurred by the pulse excitation described later, and the ASE peak wavelength ( ⁇ ASEF) was 463 nm.
- FIG. 11 is a graph showing the dependency of the emission intensity on the excitation light intensity of the pulsed nitrogen gas laser of the organic dye solid-state laser 1 having a film thickness of lOOnm in Example 1.
- the horizontal axis shows the excitation light intensity jZcm 2
- the vertical axis shows the emission intensity (arbitrary scale) at 463 nm. Show.
- FIG. 12 is a diagram showing an emission spectrum of the organic dye solid-state laser 1 with the film thickness changed in Example 1 by external excitation light.
- the horizontal axis indicates the emission wavelength (nm), and the vertical axis indicates the emission intensity (arbitrary scale).
- the external excitation light was irradiated in a nitrogen atmosphere.
- the external excitation light source 16 a He—Cd laser (325 nm) having a CW output of 10 mW was used, and the excitation light intensity was adjusted by the neutral density filter 17.
- ASE is generated by the excitation of the CW He—Cd laser light source 16, and the emission spectrum shows that the thickness of the organic semiconductor thin film 3 is 100 ⁇ m, 300 nm, It was found that very sharp emission wavelength peaks occurred in the order of 500 nm.
- FIG. 13 is a diagram showing an emission spectrum of the organic dye solid-state laser 1 having a film thickness of 500 nm in Example 1 due to external excitation light.
- the horizontal axis indicates the emission wavelength (nm), and the vertical axis indicates the emission intensity (arbitrary scale). Irradiation with external excitation light was performed in a nitrogen atmosphere.
- the pulse excitation light source 16 of the external excitation light a nitrogen gas laser (337 nm) with a pulse width of 500 ps and a repetition frequency of 10 Hz was used, and as the CW excitation light source 16, a He—Cd laser (325 nm) with an output of 10 m W was used.
- the peak wavelengths of the emission intensity were 463 nm and 462 nm, respectively, by excitation with a pulsed nitrogen gas laser and a CW He—Cd laser. It was found that strong luminescence can be obtained
- FIG. 14 is a diagram showing the excitation light intensity dependence of the emission intensity of the organic dye solid-state laser 1 having a film thickness of 500 nm in Example 1 due to He—Cd continuous wave laser excitation.
- the horizontal axis represents the excitation light intensity (mWZcm 2 )
- the vertical axis represents the emission intensity at 462 nm (arbitrary Prime).
- the excitation light intensity of the He—Cd continuous wave laser 16 increases in proportion to the excitation light intensity up to 6000 mWZcm 2 (6 W / cm 2 ).
- FIG. 15 is a diagram showing the excitation light intensity dependency of the emission intensity of FIG. 14 on the higher excitation light intensity side.
- the horizontal axis shows the excitation light intensity (WZcm 2 )
- the vertical axis shows the emission intensity (arbitrary scale) at 462 nm.
- the oscillation threshold value of ASE is 80 ⁇ 10WZcm when calculated from the intersection of the emission intensity line on the low excitation light side and the emission intensity line in the region where ASE occurs.
- the inset of FIG. 15 is a diagram showing an ASE spectrum when the excitation light intensity is 140 WZcm 2 . From this inset, a very sharp peak with an emission wavelength of ASE of 462 nm and a full width at half maximum (FWHM) of 4.8 nm was observed.
- the oscillation threshold for this ASE was an energy density of 80 WZcm 2 and an output of pumping light of 3 mW. There are no reports of such ASE at low excitation energy, that is, laser oscillation, and as far as the present inventors know, it is the minimum value for an organic dye solid-state laser.
- FIG. 16 is a diagram schematically showing a method for measuring polarization characteristics. As shown in the figure, a polarizer 31 was placed on the ASE exiting light path 30 side, this polarizer 31 was rotated (see the arrow in FIG. 16), and the intensity of the polarized ASE light 32 at that time was measured.
- FIG. 17 is a diagram showing the polarization characteristics of ASE by He—Cd continuous wave laser excitation of an organic dye solid-state laser having a film thickness of 500 nm as in Example 1.
- the horizontal axis represents the emission wavelength (nm)
- the vertical axis represents the standard ⁇ emission intensity (arbitrary scale) of 462 nm, which is the ASE emission wavelength.
- the light emission mode was found to be light emission in the TE mode, and it was found that the light emission mode also matched with the mode of the waveguide.
- This peak wavelength corresponds to the 0-1 transition peak of BSB—Cz, as does the ASE oscillation wavelength under pulse excitation, so the organic dye solid-state laser of Example 1 causes ASE oscillation by CW excitation. Turned out to be.
- FIG. 18 is a diagram showing the excitation light intensity dependence of the emission intensity due to the excitation of the He—Cd continuous wave laser of the organic dye solid-state laser 1 of Example 2.
- the excitation intensity of the He—Cd continuous wave laser 16 increases in proportion to the excitation intensity up to about 10,000 m W / cm 2 (lOWZcm 2 ), and the intensity of the light exceeds about lOWZcm 2. It increased significantly, and it was found that amplified self-oscillation, or ASE, occurred.
- the oscillation threshold of ASE was about lOWZcm 2 and the output of pumping light was 3 mW. It was found that the oscillation threshold value of ASE in Example 2 was about 1 (1Z10) that was about 1 in Example 1.
- FIG. 19 is an emission spectrum of the organic dye solid-state laser 1 of Example 2 shown in FIG. 18.
- the excitation light intensity when (A) is 210 mWZcm 2 , (B) is 20950 mWZcm 2 ( The case of about 2 lWZcm 2 ) is shown.
- the horizontal axis is the emission wavelength (nm), and the vertical axis is the emission intensity (arbitrary scale).
- the organic dye solid-state laser 1 of Example 2 when the excitation light intensity of the CW He—Cd laser is 210 mWZcm 2 and 20950 mWZcm 2 , the peak wavelength of the emission intensity is 421 nm. It was found that strong luminescence was obtained. When the excitation light intensity was 20950 mWZcm 2 , it was found that radiation with a wavelength of about 500 nm or more was not observed compared with 210 mW / cm 2, and the spectral purity increased.
- He—Cd continuous wave laser was irradiated. As a result, it was found that ASE does not occur.
- the organic semiconductor thin film 2 contains BSB-Cz or TPD as its component, and its proportion in the host molecule is 2 to 20% by weight, particularly 6% by weight. Thus, it has become a component that an amplified self-oscillation with a low emission threshold can be obtained. In addition, it was found that ASE easily obtains a waveguide structure when the thickness of the organic semiconductor thin film is increased.
- the present invention is not limited to these examples, and various modifications are possible within the scope of the invention described in the claims, and they are also included in the scope of the present invention. Not too long.
- a resonator structure using various diffraction gratings made of organic semiconductor thin films may be used.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Plasma & Fusion (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Lasers (AREA)
- Semiconductor Lasers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112006002405.1T DE112006002405B4 (de) | 2005-09-06 | 2006-09-05 | Organischer Festkörper-Farbstofflaser |
JP2007534437A JPWO2007029718A1 (ja) | 2005-09-06 | 2006-09-05 | 有機色素固体レーザー |
US12/065,898 US20090323747A1 (en) | 2005-09-06 | 2006-09-05 | Organic solid-state dye laser |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-258587 | 2005-09-06 | ||
JP2005258587 | 2005-09-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007029718A1 true WO2007029718A1 (ja) | 2007-03-15 |
Family
ID=37835837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/317582 WO2007029718A1 (ja) | 2005-09-06 | 2006-09-05 | 有機色素固体レーザー |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090323747A1 (ja) |
JP (1) | JPWO2007029718A1 (ja) |
KR (1) | KR100974322B1 (ja) |
DE (1) | DE112006002405B4 (ja) |
WO (1) | WO2007029718A1 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104981531A (zh) * | 2012-08-31 | 2015-10-14 | 国立大学法人九州大学 | 有机发光材料、有机发光材料的制造方法及有机发光元件 |
CN105315698A (zh) * | 2015-04-03 | 2016-02-10 | 北京大学 | 一种蒽类荧光染料的合成和应用 |
WO2018043763A1 (en) * | 2016-09-02 | 2018-03-08 | Kyushu University, National University Corporation | Continuous-wave organic thin-film distributed feedback laser and electrically driven organic semiconductor laser diode |
KR20180026320A (ko) * | 2016-09-02 | 2018-03-12 | 고쿠리쓰다이가쿠호진 규슈다이가쿠 | 연속파 유기 박막 분산형 피드백 레이저 및 전기적으로 구동되는 유기 반도체 레이저 다이오드 |
JP2020506527A (ja) * | 2017-02-07 | 2020-02-27 | 国立大学法人九州大学 | 電流注入有機半導体レーザダイオード、その作成方法及びプログラム |
WO2020130086A1 (ja) * | 2018-12-20 | 2020-06-25 | 国立大学法人九州大学 | 分解抑制剤、薄膜、レーザー発振素子およびレーザー色素の分解抑制方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8837550B2 (en) | 2012-11-08 | 2014-09-16 | Massachusetts Institute Of Technology | Continuous-wave organic dye lasers and methods |
JP2022524468A (ja) * | 2019-03-14 | 2022-05-02 | 国立大学法人九州大学 | 電気駆動式有機半導体レーザーダイオードおよびその製造方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002500823A (ja) * | 1997-05-09 | 2002-01-08 | ザ トラスティーズ オブ プリンストン ユニバーシテイ | 有機レーザー |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3194657B2 (ja) * | 1993-11-01 | 2001-07-30 | 松下電器産業株式会社 | 電界発光素子 |
US6160828A (en) * | 1997-07-18 | 2000-12-12 | The Trustees Of Princeton University | Organic vertical-cavity surface-emitting laser |
US6111902A (en) * | 1997-05-09 | 2000-08-29 | The Trustees Of Princeton University | Organic semiconductor laser |
US6330262B1 (en) * | 1997-05-09 | 2001-12-11 | The Trustees Of Princeton University | Organic semiconductor lasers |
US6141367A (en) * | 1998-03-20 | 2000-10-31 | Reveo, Inc. | Solid state dye laser |
JP4417627B2 (ja) * | 2001-03-30 | 2010-02-17 | ジ・アリゾナ・ボード・オブ・リージェンツ・オン・ビハーフ・オブ・ザ・ユニバーシティー・オブ・アリゾナ | 酸および/またはラジカル種を光化学生成するための物質、方法、および使用 |
US6947459B2 (en) * | 2002-11-25 | 2005-09-20 | Eastman Kodak Company | Organic vertical cavity laser and imaging system |
US6790696B1 (en) | 2003-06-30 | 2004-09-14 | Eastman Kodak Company | Providing an organic vertical cavity laser array device with etched region in dielectric stack |
-
2006
- 2006-09-05 DE DE112006002405.1T patent/DE112006002405B4/de not_active Expired - Fee Related
- 2006-09-05 US US12/065,898 patent/US20090323747A1/en not_active Abandoned
- 2006-09-05 WO PCT/JP2006/317582 patent/WO2007029718A1/ja active Application Filing
- 2006-09-05 JP JP2007534437A patent/JPWO2007029718A1/ja active Pending
- 2006-09-05 KR KR1020087005420A patent/KR100974322B1/ko not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002500823A (ja) * | 1997-05-09 | 2002-01-08 | ザ トラスティーズ オブ プリンストン ユニバーシテイ | 有機レーザー |
Non-Patent Citations (7)
Title |
---|
DIAZ-GARCIA M.A. ET AL.: "TPD-BASED BLUE ORGANIC LASERS", JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS, vol. 13, no. 3 & 4, December 2004 (2004-12-01), pages 621 - 626, XP003009794 * |
FUJITA S. ET AL.: "Yuki Laser Shikiso no Tansaku VII. Energy Ido o Riyo shita Kobunshi Usumaku Kotai Laser no Kochiku", 2004 NEN SYMPOSIUM ON PHOTOCHEMISTRY, 25 October 2004 (2004-10-25), pages 339, XP003009795 * |
FUJITA S. ET AL.: "Yuki Laser Shikiso no Tansaku VIII. Kobunshi Usumaku Kotai Laser Zairyo no Sekkei", SPSJ ANNUAL MEETING YOKOSHU, vol. 54, no. 1, 10 May 2005 (2005-05-10), pages 1643, XP003009797 * |
ICHIKAWA M. ET AL.: "Photopumped Organic Solid-State Dye Laser with a Second-Order Distributed Feedback Cavity", JPN. J. APPL. PHYS., vol. 40, no. 8A, PART 2, 1 August 2001 (2001-08-01), pages L799 - L801, XP003009793 * |
ICHIKAWA M. ET AL.: "Yuki Handotai Laser Jitsugen ni Muketa Kenkyu Kaihatsu no Genjo to Kadai", THE REVIEW OF LASER ENGINEERING, vol. 32, no. 9, September 2004 (2004-09-01), pages 570 - 575, XP003009792 * |
ITO Y. ET AL.: "Yuki Laser Shikiso no Tansaku V Energy Ido o Riyo shita Teishikiichi Keikosei Laser Zairyokei no Sekkei", POLYMER PREPRINTS, JAPAN, vol. 53, no. 1, 10 May 2004 (2004-05-10), pages 1484, XP003009798 * |
TSUZUKI T. ET AL.: "Yuki Laser Shikiso no Tansaku VI. Usumaku ni okeru Yuki Kotai Laser-yo Teishikiichi Keiko Shikiso no Sekkei", 2004 NEN SYMPOSIUM ON PHOTOCHEMISTRY, 25 October 2004 (2004-10-25), pages 338, XP003009796 * |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104981531A (zh) * | 2012-08-31 | 2015-10-14 | 国立大学法人九州大学 | 有机发光材料、有机发光材料的制造方法及有机发光元件 |
CN105315698A (zh) * | 2015-04-03 | 2016-02-10 | 北京大学 | 一种蒽类荧光染料的合成和应用 |
KR102402133B1 (ko) * | 2016-09-02 | 2022-05-26 | 고쿠리쓰다이가쿠호진 규슈다이가쿠 | 연속파 유기 박막 분산형 피드백 레이저 및 전기적으로 구동되는 유기 반도체 레이저 다이오드 |
WO2018043763A1 (en) * | 2016-09-02 | 2018-03-08 | Kyushu University, National University Corporation | Continuous-wave organic thin-film distributed feedback laser and electrically driven organic semiconductor laser diode |
KR20180026320A (ko) * | 2016-09-02 | 2018-03-12 | 고쿠리쓰다이가쿠호진 규슈다이가쿠 | 연속파 유기 박막 분산형 피드백 레이저 및 전기적으로 구동되는 유기 반도체 레이저 다이오드 |
JP2019526937A (ja) * | 2016-09-02 | 2019-09-19 | 国立大学法人九州大学 | 連続波有機薄膜分布帰還型レーザ及び電気駆動有機半導体レーザダイオード |
US11909177B2 (en) | 2016-09-02 | 2024-02-20 | Kyushu University, National University Corporation | Continuous-wave organic thin-film distributed feedback laser and electrically driven organic semiconductor laser diode |
US11539190B2 (en) | 2016-09-02 | 2022-12-27 | Kyushu University, National University Corporation | Continuous-wave organic thin-film distributed feedback laser and electrically driven organic semiconductor laser diode |
JP7162306B2 (ja) | 2017-02-07 | 2022-10-28 | 国立大学法人九州大学 | 電流注入有機半導体レーザダイオード、その作成方法及びプログラム |
US11183815B2 (en) | 2017-02-07 | 2021-11-23 | Koala Tech Inc. | Current-injection organic semiconductor laser diode, meihod for producing same and program |
US11626710B2 (en) | 2017-02-07 | 2023-04-11 | Kyushu University, National University Corporation | Current-injection organic semiconductor laser diode, method for producing same and program |
JP2020506527A (ja) * | 2017-02-07 | 2020-02-27 | 国立大学法人九州大学 | 電流注入有機半導体レーザダイオード、その作成方法及びプログラム |
US11955776B2 (en) | 2017-02-07 | 2024-04-09 | Kyushu University, National University Corporation | Current-injection organic semiconductor laser diode, method for producing same and program |
WO2020130086A1 (ja) * | 2018-12-20 | 2020-06-25 | 国立大学法人九州大学 | 分解抑制剤、薄膜、レーザー発振素子およびレーザー色素の分解抑制方法 |
Also Published As
Publication number | Publication date |
---|---|
DE112006002405T5 (de) | 2008-07-17 |
KR20080033508A (ko) | 2008-04-16 |
JPWO2007029718A1 (ja) | 2009-03-19 |
KR100974322B1 (ko) | 2010-08-05 |
DE112006002405B4 (de) | 2014-09-25 |
US20090323747A1 (en) | 2009-12-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2007029718A1 (ja) | 有機色素固体レーザー | |
Kozlov et al. | Optically pumped blue organic semiconductor lasers | |
Acuna et al. | A proton-transfer laser | |
Gómez-Durán et al. | 8-PropargylaminoBODIPY: unprecedented blue-emitting pyrromethene dye. Synthesis, photophysics and laser properties | |
Reynolds et al. | New coumarin dyes with rigidized structure for flashlamp-pumped dye lasers | |
Tang et al. | Single-benzene solid emitters with lasing properties based on aggregation-induced emissions | |
Ramirez et al. | Improved performance of perylenediimide-based lasers | |
Karunathilaka et al. | An Organic Laser Dye having a Small Singlet‐Triplet Energy Gap Makes the Selection of a Host Material Easier | |
CN110582905B (zh) | 有机半导体激光元件 | |
Gupta et al. | Low threshold distributed feedback lasers fabricated from blends of conjugated polymers: Reduced losses through Förster transfer | |
JP2023021988A (ja) | 有機エレクトロルミネッセンス素子、化合物およびその使用 | |
Belarouci et al. | Spontaneous emission properties of color centers based optical microcavities | |
US20100118903A1 (en) | Solid state laser device with reduced temperature dependence | |
Kazlauskas et al. | Concentration effects on spontaneous and amplified emission in benzo [c] fluorenes | |
Xia et al. | Characterization of a high-thermal-stability spiroanthracenefluorene-based blue-light-emitting polymer optical gain medium | |
Mamada et al. | A very low lasing threshold of DABNA derivatives with DFB structures | |
Ibnaouf et al. | Evidence for the double excimer state of conjugated polymer in a liquid solution | |
Álvarez et al. | Linear and cross-linked polymeric solid-state dye lasers based on 8-substituted alkyl analogues of pyrromethene 567 | |
TW200425604A (en) | Organic laser having improved linearity | |
Bamini et al. | Comparative photophysical and energy transfer studies of C480: C535 binary dye mixture in solid and liquid environments | |
Fakis et al. | Laser action of two conjugated polymers in solution and in solid matrix: The effect of aggregates on spontaneous and stimulated emission | |
Lee et al. | Low-threshold lasing in a microcavity of fluorene-based liquid-crystalline polymer blends | |
JPS60210893A (ja) | 液体レーザー用色素溶液 | |
CN114450814A (zh) | 激光元件、化合物、化合物的制造方法、激光增感剂 | |
US20210203122A1 (en) | Tunable laser materials comprising solid-state blended polymers |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DPE1 | Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101) | ||
ENP | Entry into the national phase |
Ref document number: 2007534437 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020087005420 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1120060024051 Country of ref document: DE |
|
RET | De translation (de og part 6b) |
Ref document number: 112006002405 Country of ref document: DE Date of ref document: 20080717 Kind code of ref document: P |
|
WWE | Wipo information: entry into national phase |
Ref document number: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 06797481 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12065898 Country of ref document: US |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8607 |