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Terahertz wave rapid modulator based on coplanar waveguide combining transistor

A coplanar waveguide and transistor technology, applied in the field of electromagnetic functional devices, can solve the problems of rapid modulation of terahertz waves, difficulty in increasing the modulation rate, and many unit structures, and achieve the effects of small circuit time constant, convenient customization, and mature technology

Active Publication Date: 2016-03-02
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

At present, quasi-optical methods are used to study terahertz external modulators in the world, but this method has large insertion loss, many unit structures, and difficult to increase the modulation rate. Fast Modulation of Hertzian Waves

Method used

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  • Terahertz wave rapid modulator based on coplanar waveguide combining transistor
  • Terahertz wave rapid modulator based on coplanar waveguide combining transistor
  • Terahertz wave rapid modulator based on coplanar waveguide combining transistor

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Embodiment Construction

[0018] The present invention proposes a waveguide-coplanar waveguide-waveguide structure formed by combining transistors and transmission line structures to realize a design scheme for dynamic modulation of terahertz waves propagating in space, and it is verified by simulation calculations and experiments It shows that this is a terahertz fast modulation device with simple structure, easy processing, and high modulation depth.

[0019] The invention comprises: input straight waveguide (1), waveguide input probe structure (2), applied voltage input (3), suspended coplanar waveguide combined with transistor nested artificial microstructure array (4), waveguide output probe structure ( 5), output straight waveguide (6).

[0020] The suspended coplanar waveguide combined with transistor nested artificial microstructure array structure may include at least one modulation unit, the modulation unit is composed of a single transistor combined with a resonant unit structure, and the re...

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Abstract

The invention discloses a terahertz wave rapid modulator based on a coplanar waveguide combining transistor, belongs to the electromagnetic function device technical field, and mainly aims at a rapid dynamic function device of the terahertz wave band; a straight waveguide cavity can introduce terahertz waves; a probe structure can couple the terahertz waves into the core portion transistor combining coplanar waveguide (CPW) structure; the core portion transistor combining coplanar waveguide (CPW) structure comprises a suspension coplanar waveguide formed by three metal wires combining with a semiconductor substrate, and a suspension transistor nested artificial microstructure array added between the coplanar waveguide and an adjacent metal transmission band; the connection / disconnection of the transistor array can be controlled so as to change transmission characteristics of the terahertz wave in the CPW, thus fast modulating the amplitude of the terahertz waves, and the modulated THz can be transmitted by the probe-waveguide structure. The terahertz wave rapid modulator is small in size, simple in processing, and fast in modulation speed.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic functional devices, focusing on fast dynamic functional devices in the terahertz band, which are used for terahertz wave modulators, terahertz wave switches, and terahertz shifters. Background technique [0002] Terahertz wave refers to the frequency between 0.1-10THz (1THz=10 12 Hz) range, which is in the transition zone from macroelectronics to microphotonics, and is the only frequency band resource that is still under development in the electromagnetic spectrum. It is between the relatively mature microwave and millimeter wave and the infrared and visible light region, and has unique electromagnetic characteristics; Anti-terrorism, communication radar and other fields have extremely important applications, and are one of the important foundations of science and technology for the next generation of information industry, and are of great significance to the national economy and national...

Claims

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Application Information

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IPC IPC(8): G02F1/01
CPCG02F1/011G02F2203/13
Inventor 张雅鑫孙翰乔绅赵运城杨梓强
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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