Terahertz modulator based on mode coupling

A mode-coupling and terahertz technology, applied in instruments, nonlinear optics, optics, etc., can solve problems such as limited modulation depth, low device sensitivity, and low Q value, and achieve easy packaging, mature technology, and good frequency selection Effects of Characteristics and Sensitivity
CN105676482AInactive Publication Date: 2016-06-15UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2016-06-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a terahertz modulator based on mode coupling and belongs to the technical field of electromagnetic functional devices. The terahertz modulator is formed by a substrate, a mode coupling artificial microstructure and a controllable dynamic semiconductor material. The mode coupling artificial microstructure comprises a bright mode resonance unit and a dark mode resonance unit. The dark mode resonance unit is located at the center of the bright mode resonance unit, and the two resonance units are subject to mode coupling to form an electromagnetic induction transmission window. The dynamic semiconductor material is located at the position of an opening of the dark mode resonance unit; under additional excitation, the dark mode working mode can be changed so that mode coupling between a bright mode and a dark mode is affected, and finally the tunable electromagnetic induction transmission window is obtained. The bright mode resonance unit and the dark mode resonance unit have the same resonance frequency point, so that very good coupling can be achieved between the bright mode and the dark mode, and the modulation bandwidth has a high Q value and large modulation depth. The terahertz modulator is processed in a micro machining mode, and a preparation process is mature and reliable. An obtained device is flexible and convenient to use and has very high potential application value in the field of terahertz wireless communication.
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Description

Technical field

[0001] The invention belongs to the technical field of electromagnetic functional devices, as well as the field of communication devices including modulators, filters, photoconductive switches, etc. Background technique

[0002] As the core device of the terahertz wireless communication system, the terahertz modulator has become a research hotspot in the field of terahertz dynamic devices in recent years. The terahertz modulator can be constructed by combining artificial microstructures with semiconductor materials, usually by photoetching a layer of artificial microstructured metal film on a semiconductor material substrate, and realizing dynamics of terahertz waves under temperature, light and voltage excitation conditions control. This scheme makes full use of the frequency response characteristics of artificial microstructures and the dynamic characteristics of semiconductor materials, and is a composite structure scheme. Although the terahertz modulator pre...

Claims

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