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A method and system for realizing tunable surface plasmon frequency division

A surface plasmon and broadband technology, applied in the field of plasmon frequency division, can solve the problem that tunable plasmon frequency division components have not been realized.

Inactive Publication Date: 2021-07-23
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as one of the core components in the nanometer optical circuit, the tunable plasmonic frequency division element has not yet been realized

Method used

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  • A method and system for realizing tunable surface plasmon frequency division
  • A method and system for realizing tunable surface plasmon frequency division
  • A method and system for realizing tunable surface plasmon frequency division

Examples

Experimental program
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Effect test

Embodiment 1

[0070] 1. Using femtosecond pulsed laser radiation with a center wavelength of 400nm to etch the surface of the silver thin film with micro-nano groove structure, the size of the groove structure is 1×40 μm and 1×20 μm. The laser spot completely covers the groove structure and the horizontal projection of the wave vector of the incident light is along the long axis (x axis) of the groove structure. Such as image 3 , image 3 It is a schematic diagram of a femtosecond pulsed laser irradiating on the surface of a silver nanofilm with a groove-shaped structure etched.

[0071] image 3 Medium K S Represents the wave vector of the SPP, whose direction is consistent with the propagation direction of the SPPs, K L is the component of the incident light wave vector projected on the sample surface, K B is the "wave vector" of the interference signal in the PEEM image.

[0072] 2. By adjusting the polarization direction of the incident laser and controlling the groove structure ...

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Abstract

The invention discloses a method and system for realizing tunable surface plasmon frequency division. The method includes: preparing a metal thin film on a substrate; using micro-nano processing technology to etch a micro-nano groove structure on the metal thin film; irradiating a laser along the long axis direction of the micro-nano groove structure to excite broadband surface plasmon excitons; controlling the polarization direction of the laser and the size of the micro-nano groove structure to efficiently excite the broadband surface plasmons; adjusting the wavelength of the laser to control the efficient excitation of the broadband surface plasmons The excitons perform frequency division. Using the method or system of the invention can realize tunable frequency division of broadband surface plasmons.

Description

technical field [0001] The invention relates to the field of surface plasmon frequency division, in particular to a method and system for realizing tunable surface plasmon frequency division. Background technique [0002] The miniaturization and integration of optoelectronic devices is a prerequisite for efficient information transmission. Due to the restriction of the optical diffraction limit, traditional optical components cannot realize the transmission and processing of information at the sub-wavelength scale. This seriously hinders the development of miniaturization and integration of optoelectronic devices. Surface plasmon polaritons (SPPs) can confine energy to sub-wavelength scales and have propagation speeds close to the speed of light. Compared with traditional optical components, plasmonic components can manipulate and transmit information on a sub-wavelength scale, which is the key to realizing ultra-high-speed, miniaturized optoelectronic devices and breaking...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/00G02B6/122G02B6/125G02B6/136
CPCG02B5/008G02B6/1226G02B6/125G02B6/136
Inventor 林景全秦楡禄
Owner CHANGCHUN UNIV OF SCI & TECH
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