CN108871580A - It is a kind of for detecting the optics thermal detector in circularly polarized light direction - Google Patents
It is a kind of for detecting the optics thermal detector in circularly polarized light direction Download PDFInfo
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- CN108871580A CN108871580A CN201810911358.8A CN201810911358A CN108871580A CN 108871580 A CN108871580 A CN 108871580A CN 201810911358 A CN201810911358 A CN 201810911358A CN 108871580 A CN108871580 A CN 108871580A
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- polarized light
- circularly polarized
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- detecting
- thermal detector
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- 239000002184 metal Substances 0.000 claims abstract description 45
- 229910052751 metal Inorganic materials 0.000 claims abstract description 45
- 239000000463 material Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 4
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- GNRSAWUEBMWBQH-UHFFFAOYSA-N nickel(II) oxide Inorganic materials [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 229910021521 yttrium barium copper oxide Inorganic materials 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 230000031700 light absorption Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 13
- 238000001514 detection method Methods 0.000 description 9
- 238000002983 circular dichroism Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 238000012790 confirmation Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005616 pyroelectricity Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J4/00—Measuring polarisation of light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J4/00—Measuring polarisation of light
- G01J4/04—Polarimeters using electric detection means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The present invention relates to a kind of for detecting the optics thermal detector in circularly polarized light direction, including thermo-responsive line, positive/negative electrode is provided at left and right sides of the thermo-responsive line, the upper surface of the thermo-responsive line is covered with metal film, is provided on the metal film and the inclined hole of horizontal direction；This is used to detect the optics thermal detector in circularly polarized light direction, improve the sensibility to circularly polarized light, by covering metal film on thermo-responsive line, the aperture on metal film, to improve the absorbability of circularly polarized light, due to the circularly polarized light of different frequency, absorptivity it is different, cause the resistivity effects to thermo-responsive line different, by connecting external power supply on thermo-responsive line, detect curent change, so that it may judge the direction of circularly polarized light；The optics thermal detector is different to the circularly polarized light absorption frequency of different frequency, the frequency of circularly polarized light can also be adjusted by detecting electric current, so that the highest circularly polarized light of absorptivity is matched with the optics thermal detector.
Description
Technical field
The present invention relates to photodetector technical fields, and in particular to a kind of for detecting the optical thermal in circularly polarized light direction
Detector.
Background technique
The physical effect of photodetector is generally divided into photon effect and photo-thermal effect, and corresponding detector is referred to as light
Subtype detector and photo-thermal type detector.The common trait of various photon type detectors is using semiconductor energy carrying material, photon
Energy has generated directly effect to photoelectronic in detection material, therefore photon type detector has cut-off response frequency or wavelength,
And spectral response is limited to a certain wave band, therefore different material systems determines that detector has different response wave length scopes,
Generally it is difficult to use in wide range or multispectral section of detection.Photo-thermal type detector is not caused directly after absorbing optical radiation energy
The change of internal electron state, but the luminous energy of absorption is become the energy of thermal motion of lattice, cause detecting element temperature to rise,
It changes so as to cause the electrical properties of detecting element or other physical properties, therefore the size of photo-thermal effect and photon energy does not have
There is direct relation, photo-thermal type detector is in principle to frequency without selectivity.Due to infrared band especially in LONG WAVE INFRARED with
The photo-thermal effect of upper wave band becomes apparent from compared to Uv and visible light, therefore optothermal detector is commonly used in the spy of middle long wave optical radiation
It surveys, typical photo-thermal type detector includes the types such as micro-metering bolometer, pyroelectric detector and thermocouple detector.Due to temperature
Raising is the effect of heat accumulation, and the general response speed of thermal detector based on photo-thermal effect is slower, in millisecond magnitude.
However, existing optothermal detector be primarily used to detection light intensity, main improvement direction be also embodied in as
In terms of the intensity of the light of what detection；It can not carry out the detection in circularly polarized light direction.
Summary of the invention
In view of the above-mentioned problems, present invention aim to address the spies that existing optothermal detector can not carry out circularly polarized light direction
The problem of survey.
For this purpose, the present invention provides a kind of for detecting the optics thermal detector in circularly polarized light direction, including thermo-responsive line,
Positive/negative electrode is provided at left and right sides of the thermo-responsive line, the upper surface of the thermo-responsive line is covered with metal film, the gold
Belong to and being provided with and the inclined hole of horizontal direction on film.
Conductive plate is additionally provided between the positive/negative electrode and thermo-responsive line.
Described hole is provided with multiple, and rectangular periodic arrangement.
The shape of described hole is rectangle, square, triangle, arc-shaped, any one in taper.
The angle of described hole and the angle α of horizontal direction is less than 90 °, and to be not equal to 45 ° of angle greater than 0 °.
The angle of described hole and the angle α of horizontal direction is 22.5 °.
Described hole is provided with L shape metal strip.
The both ends of the L shape metal strip and the both sides of hole connect, and constitute a rectangle.
The thermo-responsive wire material includes VOx, Si, SiGe, YBCO or NiO.
Using the method in the above-mentioned optics thermal detector detection circularly polarized light direction for detecting circularly polarized light direction, including
Following steps：
A1, the positive/negative electrode 4 of thermo-responsive line 1 is electrically connected with external power supply, to detect thermo-responsive 1 both ends of line
Electric signal (current signal/voltage signal) provide for the direction of subsequent judgement circularly polarized light and carry out foundation；
B1, using circularly polarized light vertical incidence metal film to be measured, and record the electric current I1 for passing through metal film；
C1, using circularly polarized light to be measured after the half-wave plate of known transmission coefficient M, vertical incidence metal film, and recording
Pass through the electric current I2 of metal film；
D1, according to the size of electric current I1 and electric current I2/M, to judge the direction of circularly polarized light to be measured.
Beneficial effects of the present invention：It is provided by the invention this for detecting the optics thermal detector in circularly polarized light direction,
The sensibility to circularly polarized light is improved, by covering metal film on thermo-responsive line, the aperture on metal film, to improve circle
The absorbability of polarised light, due to the circularly polarized light of different frequency, absorptivity it is different, lead to the resistivity effects to thermo-responsive line
Difference detects curent change, so that it may judge the direction of circularly polarized light by connecting external power supply on thermo-responsive line；Separately
On the one hand, the circularly polarized light absorption frequency of different frequency is different, can also adjust the frequency of circularly polarized light by detecting electric current, make
The highest circularly polarized light of absorptivity is obtained to be matched with the optics thermal detector.
The present invention is described in further details below with reference to attached drawing.
Detailed description of the invention
Fig. 1 is the optics thermal detector schematic diagram for detecting circularly polarized light direction.
Fig. 2 is the optics thermal detector schematic diagram two for detecting circularly polarized light direction.
Fig. 3 is the optics thermal detector schematic diagram three for detecting circularly polarized light direction.
Fig. 4 is hole inclination angle schematic diagram.
Fig. 5 is the optics thermal detector schematic diagram four for detecting circularly polarized light direction.
Fig. 6 is hole configurations schematic diagram.
Fig. 7 is the absorption curve schematic diagram that hole is rectangular circularly polarized light.
Fig. 8 is that hole is rectangular circular dichroism curve synoptic diagram.
Fig. 9 is the absorption curve schematic diagram that hole is the rectangular circularly polarized light with metal strip.
Figure 10 is that hole is the rectangular circular dichroism curve synoptic diagram with metal strip.
In figure：1, thermo-responsive line；2, hole；3, metal film；4, positive/negative electrode；5, conductive plate；6, L shape metal strip.
Specific embodiment
Reach the technical means and efficacy that predetermined purpose is taken for the present invention is further explained, below in conjunction with attached drawing and reality
Example is applied to a specific embodiment of the invention, structure feature and its effect, detailed description are as follows.
Embodiment 1
In order to solve the problems, such as that existing optothermal detector can not carry out the detection in circularly polarized light direction.The present invention provides one
Kind such as Fig. 1 is used to detect the optics thermal detector in circularly polarized light direction, including thermo-responsive line 1, the left and right two of the thermo-responsive line 1
Side is provided with positive/negative electrode 4, and the positive/negative electrode 4 is for accessing external detection power supply, to provide circularly polarized light detection institute
The power supply needed；The upper surface of the thermo-responsive line 1 is covered with metal film 3, is provided on the metal film 3 and tilts with horizontal direction
Hole 2.
The metal film 3 is the light absorbing layer that gold or silver are formed, which will not only have good absorbing properties,
Hole 2 is set on metal film 3, and the thickness of metal film 3, specifically can be according to the strong of circularly polarized light to be detected in 0~100nm
Degree is selected.In this way, different absorptivities can be generated when circularly polarized light incidence, so as to cause thermo-responsive 1 both ends of line
Loading power it is different by the electric current after thermo-responsive line 1, by detecting the size of electric current, to judge that circularly polarized light is left
Rounding polarised light or right-circularly polarized light.
Further, be additionally provided with conductive plate 5 between the positive/negative electrode 4 and thermo-responsive line 1, can make so just/
Voltage of the load of negative electrode 4 at thermo-responsive 1 both ends of line forms stable electric current, it is ensured that positive/negative electrode 4 is electrically connected with thermo-responsive line 1
It connects more sufficiently.
As shown in Fig. 2, described hole 2 is provided with multiple, and periodic arrangement, circularly polarized light can be improved in this way and pass through
The surface phasmon effect that metal film 3 is excited is more advantageous to the absorption for improving circularly polarized light, so that external power supply load exists
The curent change at thermo-responsive 1 both ends of line is more obvious, so that circularly polarized light walking direction is more accurate.
The shape of described hole 2 is rectangle, square, triangle, arc-shaped, any one in taper, not similar shape
The hole of shape influences difference to the absorptivity of circularly polarized light, selects the hole 2 of concrete shape, is carried out according to the characteristic of circularly polarized light
Selection, the present embodiment is by taking rectangular nano aperture as an example；The angle of the angle α of described hole 2 and horizontal direction be greater than 0 °,
Less than 90 °, and the angle not equal to 45 °, as shown in figure 4, hole 2 and the angle of the angle α of horizontal direction shown in Fig. 2 is
30°。
1 material of thermo-responsive line includes VOx, Si, SiGe, YBCO or NiO；The requirement of the material of thermo-responsive line 1 is pair
Change in resistance can occur in fuel factor, above-mentioned material generally has relatively high temperature-coefficient of electrical resistance (TCR), absolutely
Value be greater than 1%/DEG C；In addition, existing other heat-sensitive materials for perceiving thermal change such as existing pyroelectricity material, thermocouple
It can also serve as the making material of thermo-responsive line 1.
Embodiment 2
On the basis of embodiment 1, it present embodiments provides a kind of as shown in Figure 3 for detecting circularly polarized light direction
The left and right sides of optics thermal detector, including thermo-responsive line 1, the thermo-responsive line 1 is provided with positive/negative electrode 4；It is described thermo-responsive
The upper surface of line 1 is covered with metal film 3, and hole 2, the angle α of described hole 2 and horizontal direction is arranged on the metal film 3
Angle be 22.5 °, the size of hole 2 is long 400nm, and wide 200nm is illustrated in figure 7 left circularly polarized light, right-hand circular polarization
The absorptivity schematic diagram of light, Fig. 8 show circular dichroism curve synoptic diagram；When wavelength X=670nm, circular dichroism is taken
Extreme value, that is to say, that in wavelength X=670nm of circularly polarized light, using described in the present embodiment for detecting circularly polarized light
The effect that the optics thermal detector in direction carries out direction confirmation is most accurately, most significantly.
Embodiment 3
On the basis of embodiment 1, it present embodiments provides a kind of as shown in Figure 5 for detecting the light in circularly polarized light direction
Thermal detector is learned, including thermo-responsive line 1, the left and right sides of the thermo-responsive line 1 are provided with positive/negative electrode 4；The thermo-responsive line
1 upper surface is covered with metal film 3, and hole 2 is arranged on the metal film 3, is provided with L shape metal strip 6 in described hole 2,
The both ends of the L shape metal strip 6 are connect with the both sides of hole 2, constitute a rectangle；As shown in fig. 6, the size of hole 2 is length
400nm, wide 200nm, the width of L shape metal strip 6 are 30nm, side length 200nm, an another side length 120nm of L shape metal strip 6, such as
Fig. 9 show the absorptivity schematic diagram of left circularly polarized light, right-circularly polarized light, and Figure 10 show the signal of circular dichroism curve
Figure；When wavelength X=770nm, circular dichroism obtains ultimate attainment, that is to say, that in wavelength X=770nm of circularly polarized light,
Effect using the optics thermal detector progress direction confirmation described in the present embodiment for detecting circularly polarized light direction is most quasi-
It is true, most apparent.
Embodiment 4
Circularly polarized light direction is detected using the optics thermal detector for detecting circularly polarized light direction described in claim 1
Method, include the following steps：
A1, the positive/negative electrode 4 of thermo-responsive line 1 is electrically connected with external power supply, to detect thermo-responsive 1 both ends of line
Electric signal (current signal/voltage signal) provide for the direction of subsequent judgement circularly polarized light and carry out foundation；
B1, using circularly polarized light vertical incidence metal film 3 to be measured, and record the electric current I1 for passing through metal film 3；
C1, using circularly polarized light to be measured across known transmission coefficient M half-wave plate after, vertical metal film 3, and record pass through
The electric current I2 of metal film 3；
D1, according to the size of electric current I1 and electric current I2/M, to judge the direction of circularly polarized light to be measured.
Specifically, the chirality of the optics thermal detector for being used to detect circularly polarized light direction is known, judgement circle
The result of polarised light is as shown in the table：
Finally, it should be noted that above-mentioned judgement circularly polarized light as a result, being resistance and temperature based on thermo-responsive line 1
It is positive coefficient relationship, i.e., the case where resistance value of thermo-responsive line 1 increases with temperature and become larger；If the resistance of thermo-responsive line 1 with
The case where temperature is negative coefficient relationship, i.e., the resistance value of thermo-responsive line 1 increases with temperature and become smaller, then result is just opposite.
In conclusion it is provided in this embodiment this for detecting the optics thermal detector in circularly polarized light direction, it improves
To the sensibility of circularly polarized light, by covering metal film on thermo-responsive line 1, the aperture on metal film 3, to improve circular polarization
The absorbability of light, due to the circularly polarized light of different frequency, absorptivity it is different, cause to the resistivity effects of thermo-responsive line 1 not
Together, by connecting external power supply on thermo-responsive line 1, curent change is detected, so that it may judge the direction of circularly polarized light；It is another
The circularly polarized light absorption frequency of aspect, different frequency is different, can also adjust the frequency of circularly polarized light by detecting electric current, so that
The highest circularly polarized light of absorptivity is matched with the optics thermal detector.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (10)
1. a kind of for detecting the optics thermal detector in circularly polarized light direction, it is characterised in that:It is described including thermo-responsive line (1)
It is provided with positive/negative electrode (4) at left and right sides of thermo-responsive line (1), the upper surface of the thermo-responsive line (1) is covered with metal film
(3), it is provided with and the inclined hole of horizontal direction (2) on the metal film (3).
2. as described in claim 1 a kind of for detecting the optics thermal detector in circularly polarized light direction, it is characterised in that:It is described
Conductive plate (5) are additionally provided between positive/negative electrode (4) and thermo-responsive line (1).
3. as described in claim 1 a kind of for detecting the optics thermal detector in circularly polarized light direction, it is characterised in that:It is described
Hole (2) is provided with multiple, and rectangular periodic arrangement.
4. as claimed in claim 1 or 3 a kind of for detecting the optics thermal detector in circularly polarized light direction, it is characterised in that:
The shape of described hole (2) is rectangle, square, triangle, arc-shaped, any one in taper.
5. as claimed in claim 1 or 3 a kind of for detecting the optics thermal detector in circularly polarized light direction, it is characterised in that:
The angle of the angle α of described hole (2) and horizontal direction is less than 90 °, and to be not equal to 45 ° of angle greater than 0 °.
6. as claimed in claim 5 a kind of for detecting the optics thermal detector in circularly polarized light direction, it is characterised in that:It is described
The angle of hole (2) and the angle α of horizontal direction is 22.5 °.
7. as claimed in claim 1 or 3 a kind of for detecting the optics thermal detector in circularly polarized light direction, it is characterised in that:
Described hole (2) is provided with L shape metal strip (6).
8. as claimed in claim 7 a kind of for detecting the optics thermal detector in circularly polarized light direction, it is characterised in that:It is described
The both ends of L shape metal strip (6) are connect with the both sides of hole (2), constitute a rectangle.
9. as described in claim 1 a kind of for detecting the optics thermal detector in circularly polarized light direction, it is characterised in that：It is described
Thermo-responsive line (1) material includes VOx, Si, SiGe, YBCO or NiO.
10. detecting circularly polarized light direction using the optics thermal detector for detecting circularly polarized light direction described in claim 1
Method, which is characterized in that include the following steps：
A1, the positive/negative electrode 4 of thermo-responsive line 1 is electrically connected with external power supply, to detect the electricity at thermo-responsive 1 both ends of line
Signal (current signal/voltage signal) provides for the direction of subsequent judgement circularly polarized light carrys out foundation；
B1, using circularly polarized light vertical incidence metal film (3) to be measured, and record the electric current I1 for passing through metal film (3)；
C1, after passing through the half-wave plate that known transmission coefficient is M using circularly polarized light to be measured, vertical incidence metal film (3), and recording
Pass through the electric current I2 of metal film (3)；
D1, according to the size of electric current I1 and electric current I2/M, to judge the direction of circularly polarized light to be measured.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810911358.8A CN108871580A (en) | 2018-08-11 | 2018-08-11 | It is a kind of for detecting the optics thermal detector in circularly polarized light direction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810911358.8A CN108871580A (en) | 2018-08-11 | 2018-08-11 | It is a kind of for detecting the optics thermal detector in circularly polarized light direction |
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| CN108871580A true CN108871580A (en) | 2018-11-23 |
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| CN201810911358.8A Withdrawn CN108871580A (en) | 2018-08-11 | 2018-08-11 | It is a kind of for detecting the optics thermal detector in circularly polarized light direction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114609717A (en) * | 2022-03-21 | 2022-06-10 | 大连理工大学 | Single-layer transmission type circular polarizer suitable for visible light wave band |
-
2018
- 2018-08-11 CN CN201810911358.8A patent/CN108871580A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114609717A (en) * | 2022-03-21 | 2022-06-10 | 大连理工大学 | Single-layer transmission type circular polarizer suitable for visible light wave band |
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