CN104538828B - A kind of solid accidental laser of pulling method tuning wavelength - Google Patents
A kind of solid accidental laser of pulling method tuning wavelength Download PDFInfo
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- CN104538828B CN104538828B CN201410838289.4A CN201410838289A CN104538828B CN 104538828 B CN104538828 B CN 104538828B CN 201410838289 A CN201410838289 A CN 201410838289A CN 104538828 B CN104538828 B CN 104538828B
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- nano silver
- laser
- silver wire
- rhodamine
- dimethyl silicone
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Abstract
A kind of solid accidental laser of pulling method tuning wavelength, the laser include dimethyl silicone polymer thin layer, nano silver wire and the rhodamine after flexible substrates silica gel piece, solidification；In the scattered dimethyl silicone polymer thin layer after hardening of the nano silver wire and rhodamine, the dimethyl silicone polymer thin layer after the solidification is covered on flexible substrates silica gel piece.The rhodamine is R6G.The nano silver wire average length about 10um, average diameter about 70nm.While using nano silver wire as scattering particles, its surface can form local surface plasmon resonance enhancing phenomenon, further enhance Random Laser.By the way of mechanical stretching, the tuning of accidental laser output wavelength is realized, there is the characteristics of quick, convenient.
Description
Technical field
The present invention relates to a kind of accidental laser that wavelength tuning is realized using drawing process, belong to field of photoelectric technology.
Background technology
1966, former Soviet Union N.G.Basov et al. replaced a reflection of conventional laser resonator using scattering surface
Mirror, a kind of laserresonator that disresonance feedback is provided is realized, they foretell that random scatter can carry in disordered structure
Make light amplification for positive feedback.Nineteen sixty-eight, the academy of sciences of former Soviet Union V.S.Letokhov et al. calculates random gain media first
Middle light amplification and the optical characteristics of scattering, it is proposed that the laser emission phenomenon in random gain media.The principle of accidental laser
As shown in Figure 1.1994, Lawandy of Brown Univ USA et al. was with laser beam pumping mixed with containing Al2O3The TiO of shell2's
Dye solution, the multimode laser resonance phenomena of the system is experimentally observed, so as to demonstrate the random increasing of Letokhov propositions
The theory of Random Laser phenomenon in beneficial medium be present, here it is earliest accidental laser.Thus, the resonator of Random Laser
It is multiple scattering particles, rather than traditional minute surface.
In recent years, Random Laser has become the popular research field of international laser educational circles.Accidental laser thus need not
Extra resonance chamber, there is good stability, small volume, cheap, it is all in display, illumination, medical treatment, detection, storage etc.
Many-side has a wide range of applications.
The laser of multi-wavelength output is had a wide range of applications in photoelectron technology, therefore how to provide one kind just
The accidental laser of prompt, quick tuning wavelength, it is one of current study hotspot.
The content of the invention
The purpose of the present invention is based on above-mentioned consideration, it is proposed that a kind of by mechanical stretching method tuning operation wavelength
Accidental laser, the laser have the characteristics of convenient and swift tuning wavelength.
To achieve the above object, the technical solution adopted by the present invention is a kind of accidental laser of pulling method tuning wavelength,
The laser includes dimethyl silicone polymer thin layer 2.2, nano silver wire 2.3 and the Luo Dan after flexible substrates silica gel piece 2.1, solidification
Bright 2.4；Dimethyl silicone polymer thin layer 2.2 after the solidification contains nano silver wire 2.3 and rhodamine 2.4, after the solidification
Dimethyl silicone polymer thin layer 2.2 be covered on flexible substrates silica gel piece 2.1.
The rhodamine 2.4 is R6G.
The average length of the nano silver wire 2.3 about 10um, average diameter about 70nm.
Compared with prior art, the present invention has the advantages that：
1. while using nano silver wire as scattering particles, its surface can form the enhancing of local surface plasmon resonance
Phenomenon, further enhance Random Laser.
2. by the way of mechanical stretching, the tuning of accidental laser output wavelength is realized, is had quick, easily special
Point.
Brief description of the drawings
Fig. 1 is the generation schematic diagram of Random Laser；
Fig. 2 is solid accidental laser structural representation in the present invention.
Fig. 3 is the index path of the accidental laser in the present invention.
Fig. 4 is the output wavelength of the accidental laser in the present invention and the relation of amount of tension.
In figure, 1.1, incident light, 1.2, emergent light, 1.3, accidental laser, 2.1, flexible substrates silica gel piece, 2.2, solidification
Dimethyl silicone polymer thin layer afterwards, 2.3, nano silver wire, 2.4, rhodamine, 3.1, pump laser, 3.2, transmitting laser,
3.3rd, flexible solid laser, 3.4, spectrum instrument probe.
Embodiment
The present invention disperses rhodamine 2.4 and nano silver wire 2.3 in liquid dimethyl silicone polymer, and mixture is coated
Onto silica gel piece, after dimethyl silicone polymer solidifies straticulation, flexible solid laser 3.3 is just formd.Rhodamine 2.4 is made
For the dyestuff of gain medium, nano silver wire 2.3 serves as scattering particles and plasmon feedback material.As shown in figure 3, work as
Extraneous lasing light emitter pump laser 3.1 is to launch laser 3.2 as pump light, when being irradiated to the flexible solid laser 3.3,
The molecule absorption pump energy of rhodamine 2.4, fluorescence is sent, the disordered structure of nano silver wire 2.3 provides scattering and feedback, so as to obtain
Random Laser output is obtained, the output of Random Laser can be received with spectrometer fibre-optical probe 3.4.
When the solid state laser sample in using the method for the mechanical stretching stretching present invention, the disorderly arranged silver nanoparticle of script
Line 2.3, forms partially oriented along the draw direction of sample, and new scatter distributions are formed in sample interior, new so as to produce
The output wavelength of Random Laser, and as the increase of amount of tension, the wavelength of Random Laser occur blue-shifted phenomenon, see Fig. 4
The invention provides a kind of accidental laser of pulling method tuning wavelength, including the dye as gain medium
Material, there is provided the flexible high molecular material of the nano silver wire of scattering and plasmon feedback, disperse dyes molecule and nano silver wire
With the flexible substrates provided a supporting role.
Dimethyl silicone polymer (PDMS) is a kind of the macromolecule organic silicon compound, has the characteristics of stable, optical clear.
Dimethyl silicone polymer (PDMS) can keep a kind of fluid state before curing agent is added, and heating or for a long time placement are not sent out
Raw solidification；In mass ratio 10:After 1 adds curing agent, hardening time is about 8 hours at room temperature.Polydimethylsiloxanes after solidification
Alkane (PDMS) has the characteristics of high transmission rate and good flexibility and toughness.
The implementation of the present invention is illustrated below in conjunction with the accompanying drawings.
A kind of preparation method of the accidental laser of pulling method tuning wavelength, comprises the following steps：
(1) 3mg rhodamines (R6G) are added in 1ml ethanol, is configured to 3mg/ml rhodamine (R6G) solution；By concentration
For 0.033mol/L nano silver wire (AgNWs) alcohol dispersion liquid, take out 100ul and mixed with the rhodamine (R6G) ethanol solution
With；1g liquid dimethyl silicone polymer (PDMS) is taken out, according to mass ratio 10：1 and curing agent mix, with the side of supersonic oscillations
Method is mixed evenly；
(2) by the alcohol dispersion liquid of the rhodamine (R6G) ethanol solution and nano silver wire (AgNWs), with described poly- two
Methylsiloxane (PDMS) mixes, the mixing liquid after stirring, and is placed on pressure as 10-1It is small that 1.5 are stood in Pa vacuum tank
When, remove the air and ethanol in mixing liquid；Formation is mixed with the poly- diformazan of rhodamine (R6G) and nano silver wire (AgNWs)
Radical siloxane PDMS viscous liquids；
(3) select sheet silica gel that rhodamine (R6G) will be mixed with as flexible substrates (length and width are respectively 20mm, thickness 1mm)
The into thick about 100um thin layer of dimethyl silicone polymer (PDMS) viscous liquid spin coating with nano silver wire (AgNWs), 80 DEG C of temperature
Degree heating 30 minutes so that the dimethyl silicone polymer (PDMS) for being mixed with rhodamine (R6G) and nano silver wire (AgNWs) is completely solid
Change；Or stand 8 hours at room temperature so that the dimethyl silicone polymer containing rhodamine (R6G) and nano silver wire (AgNWs)
(PDMS) it is fully cured, thin layer is formed in silica gel piece substrate；Solid sample is ultimately formed, its structural profile illustration is shown in Fig. 2；
(4) such as Fig. 3, pump laser, (pulsewidth 10ns, pump frequency are preferred pulse YAG laser 532nm light
10Hz) it is used as pumping light irradiation solid sample；
(5) sample is stretched to the elongation of different proportion by mechanical stretching mode, realizes output Random Laser wavelength
Tuning, the output wavelength of accidental laser and the relation of amount of tension are shown in Fig. 4.
The invention provides a kind of accidental laser of pulling method tuning wavelength, and base of the invention has been shown and described above
Present principles and main preparation method.
Claims (1)
- A kind of 1. preparation method of the accidental laser of pulling method tuning wavelength, it is characterised in that：Comprise the following steps：(1) 3mg rhodamines are added in 1ml ethanol, is configured to 3mg/ml rhodamine liquor；It is 0.033mol/L's by concentration Nano silver wire alcohol dispersion liquid, take out 100ul and mixed with the rhodamine ethanol solution；Take out 1g liquid dimethyl silicone polymers (PDMS), according to mass ratio 10：1 and curing agent mix, be mixed evenly with the method for supersonic oscillations；(2) by the alcohol dispersion liquid of the rhodamine ethanol solution and nano silver wire, mix, stir with the dimethyl silicone polymer Mixing liquid after mixing uniformly, pressure is placed on as 10-11.5 hours are stood in Pa vacuum tank, removes the air in mixing liquid And ethanol；Form the polydimethylsiloxane viscous liquid for being mixed with rhodamine and nano silver wire；(3) selecting sheet silica gel, length and width are respectively 20mm, thickness 1mm, will be mixed with rhodamine and nano silver wire as flexible substrates The spin coating of dimethyl silicone polymer viscous liquid heated 30 minutes into thin layer thick about 100um, 80 DEG C of temperature so that be mixed with sieve Red bright and nano silver wire dimethyl silicone polymer is fully cured；Or stand 8 hours at room temperature so that containing rhodamine and The dimethyl silicone polymer of nano silver wire is fully cured, and thin layer is formed in silica gel piece substrate；Ultimately form solid sample；(4) pump laser, preferred pulse YAG laser 532nm light, pulsewidth 10ns, pump frequency 10Hz, as pumping Light irradiation solid sample；(5) sample is stretched to the elongation of different proportion by mechanical stretching mode, realizes the tuning of output Random Laser wavelength.
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| CN104538828A CN104538828A (en) | 2015-04-22 |
| CN104538828B true CN104538828B (en) | 2017-12-15 |
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| CN105762634B (en) * | 2016-05-13 | 2018-08-17 | 东南大学 | A kind of adjustable fexible film accidental laser of degree of polarization and preparation method thereof |
| CN106169693B (en) * | 2016-08-23 | 2020-01-03 | 东南大学 | Dye self-polymerization thin film random laser and preparation method thereof |
| CN107887787B (en) * | 2017-12-19 | 2019-07-12 | 东南大学 | A kind of flexible quanta accidental laser based on PDMS polymer |
| CN110448266B (en) * | 2018-12-29 | 2022-03-04 | 中国科学院宁波工业技术研究院慈溪生物医学工程研究所 | Random laser confocal line scanning three-dimensional ophthalmoscope and imaging method |
| CN111600187B (en) * | 2020-05-03 | 2021-03-02 | 北京师范大学 | Film random laser based on environment humidity tuning wavelength |
| CN115966987B (en) * | 2023-03-16 | 2023-06-06 | 安徽科创中光科技股份有限公司 | Multi-wavelength laser capable of being screened |
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| US6795464B2 (en) * | 2001-12-10 | 2004-09-21 | Spectra Systems Corporation | Temperature control of laser action in scattering media |
| US20070091967A1 (en) * | 2005-10-06 | 2007-04-26 | Xiaoming Tao | Laser emitting material, method for making the same and use thereof |
| US8634444B2 (en) * | 2008-10-16 | 2014-01-21 | The Boeing Company | Self-contained random scattering laser devices |
| CN102684063B (en) * | 2012-04-09 | 2014-05-07 | 北京师范大学 | White light random laser |
| CN103326229B (en) * | 2013-06-18 | 2015-12-23 | 东南大学 | A kind of Random Laser beam emitter with thermo-optical switch characteristic |
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