阅读说明：本技术 基于光热电效应的圆偏振光的探测器、系统及制备方法 (Detector, system and preparation method of circularly polarized light based on photo-thermal electric effect ) 是由 杨培志 马春阳 杨雯 杜凯翔 杨德威 邓书康 吴绍华 于 2019-10-14 设计创作，主要内容包括：本发明涉及一种基于光热电效应的圆偏振光的探测器、系统及制备方法,具体而言涉及圆偏振光测量领域,当光照射到该接电带表面时,由于该接电带一端设置有金属膜,另一端未设置金属膜,则该接电带两端会产生温度差,又由于该金属膜与电极电连接,从而该接电带两端会形成电流,并且,由于该多个相互平行的孔洞与接电带的夹角小于90度,则左旋圆偏振光和右旋圆偏振光与该接电带产生的共振情况不同,即当左旋圆偏振光和右旋圆偏振光照射到该接电带上,该接电带产生的电信号不同,通过电信号就可以简单的区分出照射带该接电带上的光是左旋圆偏振光或右旋圆偏振光。(The invention relates to a detector, a system and a preparation method of circularly polarized light based on a photoelectric effect, in particular to the field of circularly polarized light measurement, because the metal film is arranged at one end of the electric connecting belt and the metal film is not arranged at the other end of the electric connecting belt, the temperature difference is generated at the two ends of the electric connecting belt, and because the metal film is electrically connected with the electrode, the two ends of the electric connecting belt can form current, and, because the included angle between the holes which are parallel to each other and the electric connecting belt is less than 90 degrees, the resonance condition generated by the left-handed circularly polarized light and the right-handed circularly polarized light and the electric connecting belt is different, namely, when the left circularly polarized light and the right circularly polarized light are irradiated on the electric belt, the electric signals generated by the electric belt are different, the light irradiated on the contact strip can be simply distinguished as left-handed circularly polarized light or right-handed circularly polarized light by an electric signal.)

1. A circularly polarized light detector based on the photothermal effect, comprising: a charging strip, a metal film and an electrode;

the one end of connecing the electric belt digs establishes a plurality of holes that are parallel to each other and a groove that runs through all holes that are parallel to each other, and is a plurality of the hole that is parallel to each other with the contained angle that connects the electric belt is less than 90 degrees, the groove with the upper and lower plane of connecting the electric belt is all parallel, connect the electric belt to dig and establish one of hole and groove and serve still cover a layer of metal film, the other end that connects the electric belt is provided with the electrode, the metal film with the electrode electricity is connected.

2. The detector of circularly polarized light based on the photothermal effect according to claim 1, further comprising a light blocking layer provided at an end of the charging strip where the metal film is not provided.

3. The detector for circularly polarized light based on the photothermal effect according to claim 2, wherein the material of the light blocking layer is any one of titanium oxide and carbon black.

4. A detector for circularly polarized light based on the photothermal effect according to claim 1, wherein the material of the metal film comprises: at least one of gold, silver and molybdenum.

5. A circularly polarized light detector according to claim 1, characterized in that the material of the charge strip is an insulating material.

6. A circularly polarized light detector according to claim 1, characterized in that it further comprises a layer of metallic particles arranged at the bottom of the holes and the grooves.

7. A detector system for circularly polarized light based on the photothermal effect, the system comprising: a current measuring device and the detector for circularly polarized light based on the photothermal effect as claimed in any one of claims 1 to 6, wherein the positive electrode and the negative electrode of the current measuring device are electrically connected to the metal film and the electrode at both ends of the charging strip, respectively.

8. A circularly polarized light detector system according to claim 7 based on the photothermal effect, wherein said current measuring means comprises: any one of an ammeter, a voltmeter and an electric energy meter.

9. A preparation method of a circularly polarized light detector based on a photothermal electric effect is characterized by comprising the following steps:

etching a plurality of mutually parallel holes and a groove penetrating through all the holes on the electric connecting belt by using an ion beam etching method;

plating a metal film on one end of the connecting belt with grooves and holes by using an electron beam evaporation coating method;

and plating metal sections on the other end of the charging strip by using an electron beam evaporation coating method, and taking the metal sections as electrodes.

10. The method for preparing a circularly polarized light sensor according to claim 9, wherein the step of plating the end of the contact strip having the groove and the hole with a metal film by electron beam evaporation plating comprises:

plating a metal film on one end of the power connection belt with a groove and a hole by using an electron beam evaporation coating method, wherein the end is perpendicular to the power connection belt;

plating a metal film on one side wall of the hole and the groove by using an electron beam evaporation coating method to be vertical to one side wall of the hole;

and plating a metal film on the other side wall of the hole and the groove by using an electron beam evaporation coating method and in a direction perpendicular to the other side wall of the hole.

Technical Field

The invention relates to the field of circularly polarized light measurement, in particular to a detector, a system and a preparation method of circularly polarized light based on a photothermal electric effect.

Background

The circularly polarized light is light with a track of the end point of the light vector being a circle, namely, the light vector constantly rotates and has a constant magnitude, but the direction regularly changes along with time, and the circularly polarized light is divided into left circularly polarized light and right circularly polarized light.

Disclosure of Invention

The present invention is directed to provide a detector, a system and a method for detecting circularly polarized light based on the photothermal effect, so as to solve the problem that in the prior art, a precise optical instrument is required to obtain the rotation direction of the electric vector of the circularly polarized light, and then it is determined whether the circularly polarized light belongs to left circularly polarized light or right circularly polarized light, which requires a precise optical instrument, resulting in high cost.

In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:

in a first aspect, an embodiment of the present invention provides a detector for circularly polarized light based on a photothermal effect, where the detector includes: a charging strip, a metal film and an electrode;

the one end of connecing the electric tape digs establishes a plurality of holes that are parallel to each other and a groove that runs through all holes that are parallel to each other, and a plurality of holes that are parallel to each other are less than 90 degrees with the contained angle that connects the electric tape, and the groove is all parallel with the upper and lower plane that connects the electric tape, connects the electric tape to dig and establishes one of hole and groove and serve and still cover a layer of metal film, connects the other end of electric tape to be provided with the electrode, and the metal film is connected with the electrode electricity.

Optionally, the detector further comprises a light blocking layer, and the light blocking layer is arranged at one end of the electric conduction band where the metal film is not arranged.

Optionally, the material of the light-blocking layer is any one of titanium oxide and carbon black.

Optionally, the material of the metal film includes: at least one of gold, silver and molybdenum.

Optionally, the material of the charging strip is an insulating material.

Optionally, the detector further comprises a layer of metal particles disposed at the bottom of the hole and the trough.

In a second aspect, embodiments of the present invention provide another detector system for circularly polarized light based on the photothermal effect, the system including: a current measuring device and the detector of circularly polarized light based on the photothermal effect as claimed in any one of claims 1 to 6, wherein the positive electrode and the negative electrode of the current measuring device are electrically connected to the metal film and the electrode connected to both ends of the electric tape, respectively.

Optionally, the current measuring device comprises: any one of an ammeter, a voltmeter and an electric energy meter.

In a third aspect, an embodiment of the present invention provides another method for preparing a circularly polarized light detector based on a photothermal effect, where the method for preparing the circularly polarized light detector includes:

etching a plurality of mutually parallel holes and a groove penetrating through all the holes on the electric connecting belt by using an ion beam etching method;

plating a metal film on one end of the connecting belt with the groove and the hole by using an electron beam evaporation coating method;

and plating a metal node on the other end of the connecting electric belt by using an electron beam evaporation coating method, and taking the metal node as an electrode.

Optionally, the step of plating a metal film on the end of the contact strip having the groove and the hole using electron beam evaporation plating comprises:

plating a metal film on one end of the electric belt with a groove and a hole by using an electron beam evaporation coating method, wherein the end is perpendicular to the electric belt;

plating a metal film on one side wall of the hole and the groove by using an electron beam evaporation coating method, wherein the metal film is vertical to the one side wall of the hole;

and (3) plating a metal film on the other side wall of the hole and the groove by using an electron beam evaporation plating method.

The invention has the beneficial effects that:

the application comprises digging a plurality of parallel holes and a groove penetrating through all the parallel holes at one end of a connecting belt, wherein the included angle between the plurality of parallel holes and the connecting belt is less than 90 degrees, covering a layer of metal film at one end of the connecting belt where the holes and the groove are dug, arranging an electrode at the other end of the connecting belt, when light irradiates the surface of the connecting belt, because the metal film is arranged at one end of the connecting belt and the metal film is not arranged at the other end of the connecting belt, temperature difference can be generated at two ends of the connecting belt, and because the metal film is electrically connected with the electrode, current can be formed at two ends of the connecting belt, and because the included angle between the plurality of parallel holes and the connecting belt is less than 90 degrees, the resonance condition generated by left circularly polarized light and right circularly polarized light and the connecting belt is different, namely when the left circularly polarized light and the right circularly polarized light irradiate on the connecting belt, the electric signals generated by the electric connecting belt are different, and the light irradiating the electric connecting belt can be simply distinguished to be left-handed circularly polarized light or right-handed circularly polarized light through the electric signals.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a detector for circularly polarized light based on the photothermal and electric effects according to an embodiment of the present invention;

fig. 2 is a diagram illustrating an effect of a detector for circularly polarized light based on a photothermal effect on absorption of circularly polarized light according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of another detector for circularly polarized light based on the photothermal effect according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating the absorption effect of circularly polarized light by another detector based on the photothermal and electric effects according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another detector for circularly polarized light based on the photothermal effect according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating the absorption effect of circularly polarized light by another detector based on the photothermal and electric effects according to an embodiment of the present invention;

FIG. 7 is a diagram illustrating the absorption effect of circularly polarized light by another detector based on the photothermal and electric effects according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of another detector for circularly polarized light based on the photothermal effect according to an embodiment of the present invention.

Icon: 10-a power strip; 11-a metal film; 12-an electrode; 13-holes; 14-a groove; 15-light barrier layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1 is a schematic structural diagram of a detector for circularly polarized light based on a photothermal effect according to an embodiment of the present invention, as shown in fig. 1, the detector for circularly polarized light based on the photothermal effect includes: a charging strip 10, a metal film 11 and an electrode 12; one end of the electric belt 10 is dug to form a plurality of parallel holes 13 and a groove 14 which penetrates through all the parallel holes 13, the included angle between the plurality of parallel holes 13 and the electric belt 10 is smaller than 90 degrees, the groove 14 is parallel to the upper plane and the lower plane of the electric belt 10, one end of the electric belt 10 dug to form the holes 13 and the groove 14 is further covered with a layer of metal film 11, the other end of the electric belt 10 is provided with an electrode 12, and the metal film 11 is electrically connected with the electrode 12.

The shape of the contact strip 10 may be a rectangular parallelepiped, or other regular shapes, which are not limited herein, for the sake of clarity, the contact strip 10 is described as a rectangular parallelepiped, one end of the rectangular contact strip 10 is dug with a plurality of parallel holes 13 and a slot 14 penetrating through all the parallel holes 13, wherein an included angle between the plurality of parallel holes 13 and the sides of the contact strip 10 is less than 90 degrees, the slot 14 is parallel to both sides of the contact strip 10, one end of the contact strip 10 dug with the holes 13 and the slot 14 is further covered with a metal film 11, the other end of the contact strip 10 is provided with a metal node as an electrode 12 electrically connected to the metal film 11, when circularly polarized light is irradiated onto the contact strip 10, the end of the contact strip 10 covered with the metal film 11 has a stronger photothermal effect due to the metal, and a plurality of holes 13 and grooves 14 parallel to each other are dug on one end of the covering metal film 11, so that absorption of one end of the connecting strip 10 to circularly polarized light is increased, a great temperature difference is generated between the end of the connecting strip 10 covering the metal film 11 and the end not covering the metal film 11, a certain electric signal is generated between the metal film 11 and the electrode 12, whether the circularly polarized light irradiated on the connecting strip 10 is left-handed circularly polarized light or right-handed circularly polarized light can be judged according to the difference of the electric signals, specific shapes and widths of the holes 13 and the grooves 14 are selected according to actual conditions, no limitation is made here, the number of the holes 13 is selected according to actual conditions, no limitation is made here, and an included angle between the holes 13 and the connecting strip is selected according to actual conditions, and no limitation is made here.

Fig. 2 is a diagram of an effect of a circularly polarized light detector based on a photothermal effect according to another embodiment of the present invention on absorption of circularly polarized light, as shown in fig. 2, where in fig. 2, the abscissa is a wavelength, the ordinate indicates absorption of light, the curve a indicates absorption of right-handed circularly polarized light by the detector, the curve B indicates absorption of left-handed circularly polarized light by the detector, and the curve CD indicates a difference between the curves a and B, as can be seen from fig. 2, the absorption of circularly polarized light with a wavelength of 800nm by the detector is most different, even if the detector is irradiated with circularly polarized light with a wavelength of 800nm, the circularly polarized light can be determined as left-handed circularly polarized light or right-handed circularly polarized light by the absorption of the light; it should be noted that fig. 2 is a simulation effect diagram obtained by COMSOL software modeling, and a specific modeling process is not described herein again.

Fig. 3 is a schematic structural diagram of another circularly polarized light detector based on the photothermal effect according to an embodiment of the present invention, fig. 4 is a diagram illustrating an effect of the circularly polarized light detector based on the photothermal effect according to an embodiment of the present invention on absorption of circularly polarized light, as shown in fig. 3 and fig. 4, alternatively, the plurality of parallel holes 13 may be a plurality of groups, where three holes 13 are taken as a group for illustration, the plurality of parallel holes 13 are penetrated by a groove 14, and one hole 13 which is not penetrated by the groove 14 and is parallel to each other is respectively disposed on both left and right sides of the groove 14 to increase coupling of the detector to various different lights and enhance absorption of the light intensity by the detector, please refer to fig. 4 for the case of the above structure on absorption of polarized light, where the abscissa in fig. 4 is wavelength, and the ordinate indicates absorption of light, as can be seen from fig. 4, the absorption of circularly polarized light with a wavelength of 820nm by the detector is the most different, i.e., the circularly polarized light with a wavelength of 820nm can be determined to be left circularly polarized light or right circularly polarized light by the absorption of the light by the detector.

Fig. 5 is a schematic structural diagram of another circularly polarized light detector based on the photothermal effect according to an embodiment of the present invention, fig. 6 is a diagram illustrating an effect of the circularly polarized light detector based on the photothermal effect according to an embodiment of the present invention on absorption of circularly polarized light, as shown in fig. 5 and fig. 6, alternatively, when the plurality of parallel holes 13 may be a plurality of groups, where two holes 13 are illustrated as a group, the plurality of parallel holes 13 are penetrated by a groove 14, and the parallel holes 13 are disposed on one side of the groove 14 and are communicated with the groove 14 to increase coupling of the detector to different lights and enhance absorption of light intensity by the detector, please refer to fig. 6, where the abscissa in fig. 6 is a wavelength and the ordinate indicates absorption of light, as can be seen from fig. 6, the absorption of circularly polarized light with wavelengths of 600nm, 800nm and 1000nm by the detector is the most different, i.e., the circularly polarized light with wavelengths of 600nm, 800nm and 1000nm can be judged to be left circularly polarized light or right circularly polarized light by the absorption of the light by the detector.

Fig. 7 is a diagram illustrating the effect of circularly polarized light absorption by another circularly polarized light detector based on the photothermal effect according to an embodiment of the present invention, as shown in fig. 7, optionally, the groove 14 may bisect the hole 13 or may not bisect the mutually parallel holes 13, and particularly, the arrangement manner of the groove 14 is selected according to practical situations, which is not limited herein, when the groove 14 does not bisect the mutually parallel holes 13, the detector in the above-mentioned structure may absorb polarized light, referring to fig. 7, wherein the abscissa in fig. 7 is the wavelength, the ordinate represents the absorption of light, the curve a represents the absorption of right-handed circularly polarized light by the detector, the curve B represents the absorption of left-handed circularly polarized light by the detector, the curve CD represents the difference between the curves a and B, as shown in fig. 7, the absorption of circularly polarized light with wavelengths of 750nm and 1000nm by the detector is the greatest difference, namely, the detector can judge whether the circularly polarized light is left circularly polarized light or right circularly polarized light by the absorption condition of the light by irradiating the detector with circularly polarized light with the wavelength of 750nm and 1000 nm.

Fig. 8 is a schematic structural diagram of another circularly polarized light detector based on the photothermal effect according to an embodiment of the present invention, as shown in fig. 8, optionally, the detector further includes a light blocking layer 15, and the light blocking layer 15 is disposed at an end of the contact strip 10 where the metal film 11 is not disposed.

In order to make the temperature difference in the detector larger, a light blocking layer 15 may be disposed at one end of the contact strip 10 where the metal film 11 is disposed, when the light blocking layer 15 is disposed at one end of the contact strip 10 where the metal film 11 is not disposed, when circularly polarized light irradiates the detector, a large temperature difference may be generated between one end of the contact strip 10 where the metal film 11 is disposed and one end of the light blocking layer 15, and since the metal film 11 is electrically connected to the electrode 12, the flow speed of carriers at two ends of the contact strip 10 is faster, so that the current generated at two ends of the contact strip 10 is larger, and left-handed circularly polarized light and right-handed circularly polarized light are better distinguished.

Alternatively, the material of the light-blocking layer 15 is any one of titanium oxide and carbon black.

The light blocking layer 15 is a physical light blocking material, the material of the light blocking layer 15 may be titanium oxide or carbon black, when the material of the light blocking layer 15 is titanium oxide, the titanium oxide particles are coated on one end of the metal film 11 of the power connection strip 10, when the material of the light blocking layer 15 is carbon black, the carbon black particles are coated on one end of the metal film 11 of the power connection strip 10, and the thickness of the light blocking layer 15 is determined according to actual conditions and is not specifically limited herein.

Alternatively, the material of the metal film 11 includes: at least one of gold, silver and molybdenum.

The metal film 11 is used to increase the absorption of the contact strip 10 to light, and the material of the metal film 11 may be at least one of gold, silver or molybdenum, when the metal film 11 is one of gold, silver or molybdenum, particles of the gold, silver or molybdenum may be coated on the end of the contact strip 10 where the hole 13 and the groove 14 are dug, and when the metal film 11 is a mixed material of gold, silver or molybdenum, particles of the mixed material of gold, silver or molybdenum may be coated on the end of the contact strip 10 where the hole 13 and the groove 14 are dug, and the thickness of the metal film 11 is set according to actual conditions, which is not limited herein.

Optionally, the material of the contact strip 10 is an insulating material.

Optionally, the detector further comprises a layer of metal particles disposed at the bottom of the hole 13 and the slot 14.

In order to increase the absorption of the detector to the circularly polarized light, a metal particle layer (not shown in the figure) may be disposed at the bottom of the hole 13 and the groove 14 to prevent the light from irradiating on the high detector, and the detector cannot absorb the light completely to generate noise, and then the metal particle layer may be disposed at the bottom of the hole 13 and the groove 14 to absorb the light irradiating on the detector as much as possible.

The embodiment of the present application still provides a detector system of circular polarized light based on photo-thermal electric effect, and this system includes: the positive electrode and the negative electrode of the current measuring device are respectively and electrically connected with the metal film 11 and the electrode 12 which are connected with the two ends of the electric belt 10.

The positive electrode and the negative electrode of the current measuring device are respectively and electrically connected with the metal film 11 and the electrode 12 at the two ends of the connecting belt 10, so that the current measuring device can detect the current condition generated by the detector under the irradiation of circularly polarized light.

Optionally, the current measuring device comprises: any one of an ammeter, a voltmeter and an electric energy meter.

The current measuring device can be any one of an ammeter, a voltmeter and an electric energy meter, when the current measuring device is the ammeter, the anode and the cathode of the ammeter are respectively and electrically connected with the metal films 11 and the electrodes 12 at the two ends of the electric belt 10, when the current measuring device is the voltmeter, the anode and the cathode of the voltmeter are respectively and electrically connected with the metal films 11 and the electrodes 12 at the two ends of the electric belt 10, and when the current measuring device is the electric energy meter, the anode and the cathode of the electric energy meter are respectively and electrically connected with the metal films 11 and the electrodes 12 at the two ends of the electric belt 10.

The embodiment of the application further provides a preparation method of the detector based on the photo-thermal electric effect, and the preparation method comprises the following steps:

etching a plurality of mutually parallel holes 13 and a groove penetrating through all the holes on the electric connecting belt by using an ion beam etching method;

plating a metal film on one end of the connecting belt with the groove and the hole by using an electron beam evaporation coating method;

and plating a metal node on the other end of the connecting electric belt by using an electron beam evaporation coating method, and taking the metal node as an electrode.

Optionally, the step of plating a metal film on the end of the contact strip having the groove and the hole using electron beam evaporation plating comprises:

plating a metal film on one end of the electric belt with the groove 14 and the hole by using an electron beam evaporation coating method, wherein the end is vertical to the electric belt;

plating a metal film on one side wall of the hole and the groove by using an electron beam evaporation coating method, wherein the metal film is vertical to the one side wall of the hole;

and (3) plating a metal film on the other side wall of the hole and the groove by using an electron beam evaporation plating method.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.