Reflector for realizing controllable reflectivity by using surface plasma

A technology of surface plasmon and reflectivity, applied in the field of mirrors, achieves the effects of simple structure, easy deviceization, and wide application range

Inactive Publication Date: 2012-05-23
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the research and development of mirrors with adjustable reflectivity by using the attenuated total reflection characteristics of plasmon resonance is currently blank, and there is no open literature related to this technical solution

Method used

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  • Reflector for realizing controllable reflectivity by using surface plasma
  • Reflector for realizing controllable reflectivity by using surface plasma
  • Reflector for realizing controllable reflectivity by using surface plasma

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Embodiment Construction

[0022] figure 1 It is a schematic diagram of the structure when the hemispherical prism is used in the present invention. The present invention consists of a prism 2, a metal film 4, a liquid tank 5 and a temperature control circuit 6. Prism 2 also can select triangular prism or other kinds of prisms for use.

[0023] The incident light 1 of the p-polarized light is vertically incident on the prism 2 , and the incident angle is θ when it reaches the interface between the prism 2 and the metal film 4 . The thickness of the metal film 4 is very thin, only tens of nanometers, and the evanescent wave can penetrate under the metal film 4. The refractive index of distilled water under the metal film 4 is lower than that of the prism material. When the incident angle θ satisfies the excitation of surface plasmons Under the condition of resonance, the metal film-liquid interface will excite the surface plasmon wave, and at the same time, because part of the energy of the incident li...

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Abstract

The invention discloses a reflector for realizing controllable reflectivity by using a surface plasma, and aims to solve the technical problem that controllable reflectivity is realized by utilizing attenuated total reflection characteristic of plasma resonance. The reflector consists of a prism, a liquid box and a temperature control circuit, wherein a layer of metal film with uniform thickness is plated on the reflecting surface of the prism; the liquid box containing distilled water is arranged below the metal film; and the temperature of the distilled water is controlled by the temperature control circuit. The reflector realizes the control of the specular reflectance by utilizing different depressed degrees and angle positions of the reflectivity appeared on an attenuated total reflection curve caused by the refractive index change of the distilled water at different temperatures.

Description

technical field [0001] The invention relates to a reflective mirror with adjustable reflectivity. In particular, it refers to a mirror with controllable reflectance realized by using the attenuated total reflection characteristic of the excited surface plasmon resonance structure. Background technique [0002] Most of the current reflectors adopt the structure of coating on glass, which is widely used in our daily life and optical field. Its reflectivity cannot be controlled. When the incident angle and incident wavelength are fixed, its reflectivity is also fixed. [0003] The currently reported mirrors with controllable reflectivity are mainly saturable absorbing mirrors, such as semiconductor saturable absorbing mirrors (SESAM) and carbon nanotubes, which have become the most ideal mode-locking components in mode-locked lasers today. Semiconductor saturable absorber mirror passive mode-locked lasers have the characteristics of simple structure, stability and reliability,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/182G02B5/126
Inventor 侯静彭杨黄值河陆启生陈金宝刘泽金
Owner NAT UNIV OF DEFENSE TECH
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