Thermoelectron photoelectric detector based on chiral metal absorption

Abstract

The invention relates to the technical field of photoelectric detection, in particular to a thermoelectron photoelectric detector based on chiral metal absorption. The thermoelectron photoelectric detector is of a multilayer structure and sequentially comprises a substrate layer, a lower metal layer, a middle semiconductor layer and an upper metal layer from bottom to top, wherein the lower metal layer and the upper metal layer are connected through a wire. According to the thermoelectron photoelectric detector based on chiral metal absorption, different Schottky barriers caused by a left-handed hole structure and a right-handed hole structure are utilized, so that the net absorptivity of the upper metal layer and the lower metal layer is enhanced through asymmetric absorption, thereby finally improving the absorption of incident light by the detector, and facilitating the detection of the incident light. In addition, the right-handed hole structure of the upper metal layer is filled with vanadium dioxide, the temperature of the environment where the detector is located is changed, and the regulation and control over the detection wavelength can be achieved. The thermoelectron photoelectric detector is simple in structure, is easy to prepare, is very good in application prospect, and provides a new idea for the research of a detector.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection, and in particular relates to a thermal electron photodetector based on chiral metal absorption. Background technique [0002] Chirality refers to the property that itself cannot completely overlap with the mirror image, in which a chiral substance and its mirror image have left-handedness and right-handedness respectively, and are called chiral counterparts. The structure of many substances in nature has chirality, such as protein, DNA and so on. Chirality is particularly important to the significance of life, so detecting the chirality of substances has become a research hotspot for many researchers. Circular Dichroism (CD) is usually used to detect the chirality of substances or structures. CD can be defined as the difference in the absorption rate of chiral media for different circularly polarized light, and the difference is circular dichroism. [0003] Due to the developmen...

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Problems solved by technology

[0006] In order to solve the problems of low light absorption and difficult modulation of the absorption band of photodetectors based on metal absorption existing in the prior art, the present invention provides a thermionic photodetector based on chiral metal absorption

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