CN110031988B - Surface plasmon generation light source for adjusting different propagation modes - Google Patents
Surface plasmon generation light source for adjusting different propagation modes Download PDFInfo
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- CN110031988B CN110031988B CN201910331833.9A CN201910331833A CN110031988B CN 110031988 B CN110031988 B CN 110031988B CN 201910331833 A CN201910331833 A CN 201910331833A CN 110031988 B CN110031988 B CN 110031988B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/008—Surface plasmon devices
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/0136—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour for the control of polarisation, e.g. state of polarisation [SOP] control, polarisation scrambling, TE-TM mode conversion or separation
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Abstract
The invention relates to a surface plasmon generating light source for adjusting different propagation modes, which comprises a substrate layer, wherein a first electric heating plate is arranged above the substrate layer, a first thermosensitive adjusting layer is arranged on the first electric heating plate, a light guide layer is arranged above the first thermosensitive adjusting layer, a second thermosensitive adjusting layer is arranged above the left part of the light guide layer, and a second electric heating plate is arranged above the second thermosensitive adjusting layer; a plurality of first polarized light sources which are arranged periodically are arranged in the left part of the first heat-sensitive adjusting layer, a plurality of second polarized light sources which are arranged periodically are arranged in the left part of the second heat-sensitive adjusting layer, and both ends of the first polarized light sources are electrically connected with the electrodes; the surface plasmon generating light source for adjusting different propagation modes can generate surface plasmon lights with different polarization properties, the light source has good controllability, and the properties of the obtained surface plasmon lights can be adjusted at any time according to needs, so that the surface plasmon generating light source is very convenient.
Description
Technical Field
The invention belongs to the technical field of surface plasmon light sources, and particularly relates to a surface plasmon generation light source capable of adjusting different propagation modes.
Background
Surface Plasmons (SPs) are an electromagnetic surface wave formed by coherent oscillation of free electrons at the interface of a metal medium. SPs can realize light transmission and control in a sub-wavelength range and can generate a remarkably enhanced local optical electric field in some special metal micro-nano structures, so that the SPs have important application in a plurality of fields such as biosensors, surface Raman scattering enhancement, photon circuits and the like. In recent years, compounding precious metal nanoparticles with semiconductor nanostructures to obtain optically resonant systems has caused a hot trend in research due to their unique and superior properties that are different from those of the composite monomers. The local enhanced electromagnetic field caused by the local surface plasmons of the metal nanoparticles can generate a series of nonlinear effects, and the coupling of the nonlinear effects with excitons in semiconductor quantum dots can regulate and control light absorption, light emission, energy transfer between nano structures and generation of new polaritons, wherein the generation of the new polaritons indicates that the surface plasmons and the excitons perform strong interaction, namely enter a strong coupling region. The strongly coupled surface plasmon and exciton can reversibly exchange energy, the period of the strongly coupled surface plasmon and exciton can be in the femtosecond magnitude, and the strongly coupled surface plasmon and exciton have important application in the fields of quantum control photons, single photon light sources and transistors, threshold-free lasing, ultrafast full-light-on light, quantum information processing and the like.
The surface plasmon restricts the electromagnetic field to the sub-wavelength range and greatly enhances the local electromagnetic field strength, so that strong coupling can be obtained at room temperature without closing the resonant cavity. The surface plasmon and the exciton form a new polariton during strong coupling, and energy level splitting, namely Rabi splitting, can be observed at the resonance frequency. Most studies are now focused on the strong coupling of surface plasmons to excitons in dyes or small molecules, while few studies are focused on the strong coupling to excitons in semiconductor quantum dots. Compared with dyes or small molecules, the semiconductor quantum dots have a series of advantages of adjustable photoelectric property height, high absorption and fluorescence cross section, difficult occurrence of fluorescence bleaching and the like, and are bound to become core materials of a new generation of photoelectric devices.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a surface plasmon generating light source for adjusting different propagation modes, which includes a substrate layer, a first electric heating plate disposed above the substrate layer, a first thermal sensitive adjusting layer disposed on the first electric heating plate, a light guide layer disposed above the first thermal sensitive adjusting layer, a second thermal sensitive adjusting layer disposed above the left portion of the light guide layer, and a second electric heating plate disposed above the second thermal sensitive adjusting layer; the left part of the first heat-sensitive adjusting layer is internally provided with a plurality of first polarized light sources which are arranged periodically, the left part of the second heat-sensitive adjusting layer is internally provided with a plurality of second polarized light sources which are arranged periodically, and the two ends of the second polarized light sources are electrically connected with the electrodes.
The light guiding layer is a graphene layer.
The thickness of the light guide layer is 30 nm-100 nm.
The first thermosensitive adjusting layer and the second thermosensitive adjusting layer are both made of polymethyl methacrylate.
The substrate layer is made of silicon dioxide.
The first thermosensitive adjusting layer and the second thermosensitive adjusting layer are cylindrical.
The first heat-sensitive adjusting layer and the second heat-sensitive adjusting layer are arranged in an axisymmetric manner by taking the light guide layer as an axis.
The first heat-sensitive adjusting layer and the second heat-sensitive adjusting layer are both cuboid.
The invention has the beneficial effects that: according to the surface plasmon generating light source for adjusting different propagation modes, the light sources with different polarization states are arranged on the upper side and the lower side of the light guide layer, the distances between the light sources with different polarization states and the light guide layer are adjusted by heating, the phases of light emitted by the light sources with different polarization states on the upper side and the lower side can be adjusted, and the light is coupled differently on the light guide layer, so that surface plasmon lights with different polarization properties can be generated.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic view of the structure of a surface plasmon generating light source that adjusts different propagation modes.
Fig. 2 is a sectional top view of a structure of the surface plasmon generating light source for adjusting different propagation modes.
Fig. 3 is a second structural diagram of the surface plasmon generating light source for adjusting different propagation modes.
In the figure: 1. a first electric heating plate; 2. a first thermo-sensitive regulating layer; 3. a first polarized light source; 4. a light guide layer; 5. a second thermo-sensitive regulating layer; 6. a second polarized light source; 7. a second electric heating plate; 8. an electrode; 9. a substrate layer.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Example 1
The embodiment provides a surface plasmon polariton generation light source for adjusting different propagation modes as shown in fig. 1 and fig. 2, which includes a substrate layer 9, wherein the substrate layer 9 can be made of silicon dioxide and mainly plays a supporting role, a first electric heating plate 1 is arranged above the substrate layer 9, a first thermal adjusting layer 2 is arranged on the first electric heating plate 1, a light guide layer 4 is arranged above the first thermal adjusting layer 2, a second thermal adjusting layer 5 is arranged above the left part of the light guide layer 4, and a second electric heating plate 7 is arranged above the second thermal adjusting layer 5; a plurality of first polarized light sources 3 which are arranged periodically are arranged in the left part of the first heat-sensitive adjusting layer 2, a plurality of second polarized light sources 6 which are arranged periodically are arranged in the left part of the second heat-sensitive adjusting layer 5, and both ends of the first heat-sensitive adjusting layer are electrically connected with electrodes 8; the first polarized light source 3 and the second polarized light source 6 are arranged at the left part, and are parts for ensuring the light guide layer 4 to extend, so that the surface plasmon coupling light generated by the first polarized light source 3 and the second polarized light source 6 is transmitted; the first electric hot plate 1 can heat the first heat-sensitive adjusting layer 2, and the first heat-sensitive adjusting layer 2 has different expansion volumes under the condition of different temperatures, so that the distances from the first polarized light source 3 arranged in the first heat-sensitive adjusting layer 2 to the light guide layer 4 can be adjusted to be different; similarly, the second electric heating plate 7 can heat the second thermo-sensitive adjusting layer 5, and the second thermo-sensitive adjusting layer 5 has different expansion volumes under the condition of different temperatures, so that the distance between the second polarized light source 6 arranged in the second thermo-sensitive adjusting layer 5 and the light guide layer 4 can be adjusted to be different; thus, the distance between the light emitted by the first polarized light source 3 and the light emitted by the second polarized light source 6 and transmitted to the light guide layer 4 is adjustable, so that the phase of the light emitted by the first polarized light source 3 and the phase of the light emitted by the second polarized light source 6 are adjustable when the light guide layer 4 is coupled, the coupling of the polarized light with different phases can be generated at different distances, and the polarization properties of the generated surface plasmon light can be different; on the other hand, the polarization property of the generated surface plasmon light can be controlled by controlling the distances between the first polarized light source 3, the second polarized light source and the light guide layer 4, so that the polarization property of the surface plasmon light can be adjusted.
Further, the first polarized light source 3 and the second polarized light source 6 may be light sources with different polarization directions, for example, the first polarized light source 3 is a light source with S polarization state, and the second polarized light source 6 is a light source with polarization state.
Further, the light guide layer 4 is a graphene layer; the thickness of the light guide layer 4 is 30nm to 100 nm.
The first thermosensitive adjusting layer 2 and the second thermosensitive adjusting layer 5 are both made of polymethyl methacrylate, the polymethyl methacrylate is high in transparency and has good light transmission, the light transmittance reaches 92%, and the polymethyl methacrylate has the characteristics of good insulativity, good heat resistance, toughness, hardness and rigidity, the thermal deformation temperature is 80 ℃, and the bending strength is 110 Mpa.
Further, as shown in fig. 1, the first thermosensitive adjustment layer 2 and the second thermosensitive adjustment layer 5 are both cylindrical.
Furthermore, the first heat-sensitive adjusting layer 2 and the second heat-sensitive adjusting layer 5 are arranged in an axisymmetric manner with the light guide layer 4, so that the first polarized light source 3 and the second polarized light source 6 can be symmetrically arranged on the upper side and the lower side of the light guide layer 4.
Further, as shown in fig. 3, the first and second temperature- sensitive adjustment layers 2 and 5 are each rectangular parallelepiped, and the rectangular parallelepiped can generate light with better parallel characteristics.
In summary, in the surface plasmon generating light source for adjusting different propagation modes, the light sources with different polarization states are arranged on the upper side and the lower side of the light guide layer 4, and the distances between the light sources with different polarization states and the light guide layer 4 are adjusted by heating, so that the phases of light emitted by the light sources with different polarization states on the upper side and the lower side can be adjusted, and the light is coupled differently on the light guide layer 4, and thus surface plasmon lights with different polarization properties can be generated.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (8)
1. A surface plasmon generation light source for adjusting different propagation modes, characterized in that: the heat-sensitive light-emitting diode comprises a substrate layer (9), wherein a first electric heating plate (1) is arranged above the substrate layer (9), a first heat-sensitive adjusting layer (2) is arranged on the first electric heating plate (1), a light guide layer (4) is arranged above the first heat-sensitive adjusting layer (2), a second heat-sensitive adjusting layer (5) is arranged above the left part of the light guide layer (4), and a second electric heating plate (7) is arranged above the second heat-sensitive adjusting layer (5); the left part of the first thermosensitive adjusting layer (2) is internally provided with a plurality of first polarized light sources (3) which are periodically arranged, the left part of the second thermosensitive adjusting layer (5) is internally provided with a plurality of second polarized light sources (6) which are periodically arranged, and two ends of each of the first polarized light sources (3) and the second polarized light sources (6) are electrically connected with the electrodes (8).
2. A surface plasmon generating light source for tuning different propagation modes as defined in claim 1 wherein: the light guiding layer (4) is a graphene layer.
3. A surface plasmon generating light source for tuning different propagation modes as defined in claim 1 wherein: the thickness of the light guide layer (4) is 30 nm-100 nm.
4. A surface plasmon generating light source for tuning different propagation modes as defined in claim 1 wherein: the first thermosensitive adjusting layer (2) and the second thermosensitive adjusting layer (5) are both made of polymethyl methacrylate.
5. A surface plasmon generating light source for tuning different propagation modes as defined in claim 1 wherein: the substrate layer (9) is made of silicon dioxide.
6. A surface plasmon generating light source for tuning different propagation modes as defined in claim 1 wherein: the first thermosensitive adjusting layer (2) and the second thermosensitive adjusting layer (5) are both cylindrical.
7. A surface plasmon generating light source for tuning different propagation modes as defined in claim 1 wherein: the first heat-sensitive adjusting layer (2) and the second heat-sensitive adjusting layer (5) are arranged in an axisymmetric manner by taking the light guide layer (4) as an axis.
8. A surface plasmon generating light source for tuning different propagation modes as defined in claim 1 wherein: the first heat-sensitive adjusting layer (2) and the second heat-sensitive adjusting layer (5) are both cuboid.
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| US10317342B2 (en) * | 2015-07-05 | 2019-06-11 | The Texas A&M University System | Nanometer scale microscopy via graphene plasmons |
| CN105406357B (en) * | 2015-12-10 | 2018-12-11 | 上海电机学院 | Phasmon photon source device and the method for generating surface phasmon photon |
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