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Visible light meta-material polarization converter

A polarization converter and metamaterial technology, applied in the field of excimer nanophotonics, can solve problems such as the unsuitability of optoelectronic devices, and achieve the effect of reducing difficulty and efficient polarization conversion

Active Publication Date: 2019-06-18
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the inherent defects of natural materials are not suitable for the development of modern optoelectronic devices

Method used

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  • Visible light meta-material polarization converter
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  • Visible light meta-material polarization converter

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Embodiment Construction

[0021] In order to more clearly illustrate the technical solution of the present invention and its good effects, the technical solution of the present invention will be described in detail below.

[0022] Such as Figures 1 to 3 As shown, the present invention proposes a visible light metamaterial polarization converter, the structure of which is periodically arranged in the xy plane. Two metal nanorods arranged orthogonally are an important part of the periodic structure. The major axes of the two are along the ox and y directions, respectively. The oz direction is perpendicular to the two-dimensional plane composed of two metal nanorods. The metal nanorods are tiled on a metal substrate with a certain thickness, and the metal substrate is a gold or silver film with a certain thickness.

[0023] Preferably, the structural parameters of the metal nanorods are set as follows: L=230nm, w=80nm, g=30nm; the period p=600nm. Under this condition, the incident linearly polarized ...

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Abstract

The invention discloses a visible light meta-material polarization converter. Unit structures forming an optically-specific material are periodically arranged in an xy plane. Each periodic structure consists of two metal nanorods of the same size, the long axes of which are perpendicular to each other. A metal thin film having a certain thickness serves as a substrate of the optically-specific material and mainly plays the role of avoiding transmission of incident light. The optically-specific material is a novel meta-material polarization converter, and has an all-metal structure; and the polarization conversion efficiency is more than 90%. Through necessary simplification of a traditional metal-insulator-metal (MIM) model, material processing difficulty is greatly reduced, and variablesaffecting material performance are also reduced; and therefore, the optically-specific material is the efficient, reliable and stable metamaterial polarization converter, and has an important application in the research and development of photoelectric devices.

Description

technical field [0001] The invention relates to a visible light metamaterial polarization converter that realizes high-efficiency polarization conversion in the visible light band, and belongs to the field of surface plasmon nanophotonics. Background technique [0002] Metamaterials, one of the hot topics in the field of materials science research in this century, have aroused the interest of many researchers at home and abroad with their unique artificial micro-nano structures and novel physical properties. In recent years, with the gradual development of metamaterial research work, its theory has become more and more mature, and its application scope has gradually extended from the field of optics to communication, energy, life medicine and other fields, forming a series of interdisciplinary subjects. By artificially designing and embedding artificial resonance units, a series of interactions with incident light or electromagnetic waves occur. Through such a process, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B1/00
Inventor 董正高周学通李家奇
Owner SOUTHEAST UNIV