Terahertz-wave asymmetric transmission apparatus based on artificial electromagnetic material

An artificial electromagnetic material and asymmetric transmission technology, which can be used in instruments, nonlinear optics, optics, etc., can solve problems such as limitations and unseen terahertz linear polarization conversion

Inactive Publication Date: 2012-09-26
HARBIN ENG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

At present, most of the research in this area is limited to circular polarization, and there is no related research on the asymmetric transmission of terahertz

Method used

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  • Terahertz-wave asymmetric transmission apparatus based on artificial electromagnetic material
  • Terahertz-wave asymmetric transmission apparatus based on artificial electromagnetic material
  • Terahertz-wave asymmetric transmission apparatus based on artificial electromagnetic material

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Embodiment Construction

[0023] The present invention will be described in more detail below with examples in conjunction with the accompanying drawings.

[0024] The first embodiment of the present invention is shown in Figure 1, the terahertz wave asymmetric transmission device S-1 includes a dielectric layer 1 and double artificial electromagnetic material layers 2, 3; the dielectric layer is located between the double artificial electromagnetic material layers, Organic polymer dielectric materials are used, with a width of ρ=75μm; double artificial electromagnetic material layers are located on the surfaces of both sides of the dielectric layer, and each layer is composed of periodically arranged continuous U-shaped artificial electromagnetic material basic units, where r 1 = 15.75 μm, r 2 = 22.75 μm, a = 24 μm, w = 7 μm, the artificial electromagnetic material adopts gold material, and its film thickness is above 200 nanometers.

[0025] The implementation is further described below in conjuncti...

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Abstract

The invention provides a terahertz-wave asymmetric transmission apparatus based on an artificial electromagnetic material, which comprises a medium layer and double layers of artificial electromagnetic material layers. The medium layer is located between the double layers of artificial electromagnetic material layers; the medium layer is monocrystalline silicon or organic high-polymer medium material and the thickness of the medium layer is micron dimension; the double layers of artificial electromagnetic material layers are located on the surfaces of two side surfaces of the medium layer; the double layers of artificial electromagnetic material layers are composed of basic units of the artificial electromagnetic materials periodically arranged; and the thicknesses of the films are more than 200nm, and each basic unit of the artificial electromagnetic material is a linear, L-shaped or continuously U-shaped metal structure with a certain width. The terahertz-wave asymmetric transmission apparatus disclosed by the invention has strong linear polarization conversion dichroism; asymmetrical transmission of the terahertz linear polarization wave conversion is realized by a dual-layer chiral structure. a terahertz-wave isolator or a terahertz-wave diode can be realized, and the significance on development of a terahertz artificial electromagnetic material function apparatus is achieved.

Description

technical field [0001] The invention relates to an electromagnetic wave transmission control device, especially an asymmetric transmission control device for linear polarization conversion in the terahertz band. Background technique [0002] Terahertz (THz) waves generally refer to electromagnetic waves with a frequency in the range of 0.1THz-10THz. Its wave band is between microwave and infrared waves, and it has important academic and applied research values. Researchers have long sought devices that can control the transmission of terahertz waves. However, it is difficult for conventional materials to achieve electromagnetic response in the terahertz band, especially the magnetic response, which makes people face many restrictions when developing terahertz devices to realize the detection and manipulation of terahertz waves. The emergence of artificial electromagnetic materials (Metamaterials) just makes up for this shortcoming. In recent years, terahertz switches, modu...

Claims

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Application Information

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IPC IPC(8): G02F1/01
Inventor 史金辉刘星辰朱正关春颖王政平
Owner HARBIN ENG UNIV
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