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Finite surface band gap topologic insulator-based material interface light beam IF displacement system

A topological insulator, limited technology, applied in the field of optical information, can solve the problems of limited surface band gap of topological insulators, no displacement of surface characteristics of topological insulators, etc.

Active Publication Date: 2018-10-02
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0005] Although many people have studied the special electromagnetic properties of topological insulators, their studies are all in the case of infinite bandgap, and there are very few studies on the finite surface bandgap of topological insulators. Chen studied the finite surface bandgap The effect of gapped topological insulators on the Casimir force, but there is no study on the characteristic displacement of the surface of topological insulators with finite surface bandgap

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  • Finite surface band gap topologic insulator-based material interface light beam IF displacement system
  • Finite surface band gap topologic insulator-based material interface light beam IF displacement system
  • Finite surface band gap topologic insulator-based material interface light beam IF displacement system

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Embodiment Construction

[0056] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0057] figure 1 It is an analysis flowchart of the present invention. The method of analyzing the Imbert-Fedorov displacement of the reflected beam on the topological insulator with limited surface bandgap based on the energy flow method is carried out as follows:

[0058] Step 1: Establish a single-interface model of a topological insulator with an ordinary isotropic medium and an isotropic finite surface band gap;

[0059] The second step: determine the boundary and initial conditions;

[0060] The third step: calculate the transmission coefficient and reflection coefficient on the single interface of the topological insulator with ordinary medium and limited surface band gap;

[0061] Step 4: Use the modified energy flow method to obtain the energy flow in all directions;

[0062] Step 5: Obtain the Imbert-Fedorov (IF) displacement.

[0063] Th...

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Abstract

The invention discloses a method for calculating Imbert-Fedorov displacement of reflected light beam on a topologic insulator of a finite surface band gap based on an energy flux method. The method comprises the following steps of 1: building single interface models of a general isotropic medium and the isotropic finite band gap topologic insulator; 2: determining boundary and initial conditions;3: calculating transmission coefficients and reflection coefficients on single interfaces of the general medium and a chiral medium; 4: calculating energy fluxes in all directions by using a correctedenergy flux method; and 5, calculating the Imbert-Fedorov (IF) displacement. The transverse displacement characteristics of the single interface models of the general medium and the finite band gap topologic insulator can be accurately analyzed; the topologic insulator of the finite surface band gap is relatively close to a theoretical model of an actual topologic insulator material, and has relatively high application values as a test model; a new way is provided for IF displacement control; and an optical method is provided for measuring topologic magnetoelectric polarization properties.

Description

technical field [0001] The invention belongs to the technical field of optical information, and in particular relates to a modified energy flow method to obtain an IF (Imbert-Fedorov) displacement system on a topological insulator interface of a common medium-limited surface band gap. (transverse displacement of reflected beam) Background technique [0002] When the electromagnetic wave is totally reflected on the interface of two homogeneous media, the center of the reflected wave will be displaced relative to the center of the incident wave, that is, the Goos- (GH) lateral displacement and Imbert-Fedorov (IF) lateral displacement perpendicular to the incident surface. Theoretical and experimental research on GH and IF displacement has always been an important means to explore the interaction between light waves and physical media. Through the study of displacement characteristics It is possible to understand the impact of the incident mode, polarization state and medium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20Y02E60/00
Inventor 曾然唐龙王驰侯金鑫胡淼李齐良
Owner HANGZHOU DIANZI UNIV
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