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An all-optical control terahertz intensity modulator and terahertz intensity modulator

An intensity modulator and terahertz technology, applied in the field of terahertz spectroscopy, can solve the problems of low modulation speed and narrow spectral range

Inactive Publication Date: 2016-07-13
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: aiming at the problems of low modulation speed and narrow spectral range of existing terahertz intensity modulators and improving the application range of the system, the present invention proposes an all-optical control terahertz intensity modulator and The terahertz intensity modulator enhances the photon absorption efficiency of the graphene layer through the nano-gold particle layer, increases the density of photogenerated carriers, and then strengthens the absorption of terahertz waves and enhances the modulation effect of the modulator

Method used

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  • An all-optical control terahertz intensity modulator and terahertz intensity modulator

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Embodiment 1

[0090] Embodiment 1: An all-optical control terahertz intensity modulator includes:

[0091] Terahertz wave generator, used to generate terahertz wave;

[0092] Pump light wave generator for generating pump light waves;

[0093] The terahertz intensity modulator is used to absorb the photons of the pump light wave to generate photogenerated carriers, and then absorb the terahertz wave used to drive the movement of the photogenerated carriers. The photogenerated carriers are driven by the terahertz wave electric field and other Particles interact to consume and disperse the energy of the terahertz wave electric field into other particles, thereby modulating the intensity of the terahertz wave; by adjusting the intensity of the pump light wave, the concentration of photogenerated carriers in the graphene layer is adjusted, and the terahertz wave is finally modulated The output intensity of the terahertz intensity modulator includes:

[0094] The nano-gold particle layer is used to abso...

Embodiment 2

[0097] Embodiment 2: On the basis of embodiment 1, the terahertz wave generating device includes a terahertz generator for generating terahertz wave signals, and a terahertz wave input for focusing the terahertz wave energy output by the terahertz generator The regulator, after the terahertz wave input regulator performs energy focusing on the terahertz wave signal, the terahertz wave focus is located on the upper surface of the graphene layer, and the quartz substrate is located on the lower surface of the graphene layer.

Embodiment 3

[0098] Embodiment 3: On the basis of Embodiment 2, the terahertz wave input angle adjuster is a terahertz lens or a parabolic mirror.

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Abstract

The invention relates to the technical field of terahertz spectroscopy, in particular to a graphene-based all-optical control ultra-high-speed terahertz intensity modulator. The technical problem to be solved by the present invention is: aiming at the problems of low modulation speed and narrow spectral range of existing terahertz intensity modulators and improving the application range of the system, the present invention proposes a graphene-based all-optical control ultra-high-speed terahertz The intensity modulator enhances the photon absorption efficiency of graphene through gold nanoparticles, increases the concentration of photogenerated carriers, and then strengthens the absorption of terahertz waves and enhances the modulation effect of the modulator. The present invention includes: a terahertz wave generating device, a pumping light wave generating device, a terahertz intensity modulator, and a terahertz wave detecting device, and the design of the present invention is completed through the above connections. The invention is mainly applied in the fields of terahertz communication system and terahertz research.

Description

Technical field [0001] The present invention relates to the technical field of terahertz spectrum, in particular to an all-optical control terahertz intensity modulator and a terahertz intensity modulator. Background technique [0002] Terahertz waves have broad application prospects in biomedical diagnosis, airport security imaging, military exploration, atmospheric research, high-speed communications, quality control of packaging products, and agricultural humidity analysis. Driven by application requirements, terahertz science and technology has made great progress. In the past two decades, the development of terahertz time-domain spectroscopy technology and quantum cascade lasers has provided suitable light sources and detection methods for the study of terahertz waves, which has led to great developments in terahertz emission and detection technologies. As a key component of the terahertz signal transmission system, the terahertz intensity modulator is of great significance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/01G02F1/11
Inventor 彭龙瑶朱礼国钟森城孟坤刘乔李泽仁
Owner INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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