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Integrated terahertz generation focusing filter element and terahertz detection system

A filter element and terahertz technology, applied in the field of terahertz time-domain spectroscopy system, can solve the problems of complex production process, difficulty in large-scale use, and low production efficiency, and achieve the effects of small size, low cost, and improved production efficiency

Active Publication Date: 2019-08-09
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

[0004] The present invention aims at the problems that the traditional terahertz source crystals are complicated in manufacturing process, expensive in price, low in production efficiency, and difficult to be used on a large scale, and proposes an integrated terahertz generation focusing filter element and terahertz detection system, through simple integration The device can both generate terahertz waves and focus terahertz waves while filtering out pump light

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Embodiment Construction

[0019] Due to its wide application prospects and unique properties, such as penetration, bandwidth, coherence, transient, etc., terahertz waves have attracted more and more attention from scientific researchers. However, the lack of high power, low price, small size, and portability are the main problems that limit the development and application of terahertz.

[0020] In the terahertz time-domain spectroscopy system, if the optical rectification method is used to generate terahertz radiation and at the same time want to improve its radiation efficiency, in addition to selecting crystals with high nonlinear coefficients, it is also possible to use highly nonlinear nanoparticles doped with some special materials, such as Molybdenum trioxide to improve the conversion efficiency of terahertz wave.

[0021] It has been found through research that integrated components have the advantages of small size, portability, low price, and high stability. If the pump source system can be in...

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Abstract

The invention relates to an integrated terahertz generation focusing filter element and a terahertz detection system. The integrated terahertz generation focusing filter element comprises a circular arc-shaped plastic-type colloid material and a coating layer, wherein the circular arc-shaped plastic-type colloid material is prepared by uniformly stirring a liquid plastic-type colloid material andhighly nonlinear nano particles and then placing in a grinding tool for plastic molding. The coating layer adopts any coating layer which absorbs visible and near infrared light and transmits terahertz, the coating layer is uniformly wrapped on the outer arc surface of the plastic-type colloid material which is formed into a circular arc shape after the high nonlinear nano particles are added, andone side of the integrated terahertz generation focusing filter element is a plastic-type colloid material plane, and the other side is an arc-shaped coating layer. Through a simple integrated device, terahertz waves can be generated, terahertz can be focused, and pump light can be filtered meanwhile. Meanwhile, a terahertz time domain spectroscopy system formed by the element integrates a current system, and a hand-held terahertz detection system can be realized.

Description

technical field [0001] The invention relates to a terahertz time-domain spectroscopy system, in particular to an integrated terahertz generation focusing filter element and a terahertz detection system. Background technique [0002] Terahertz wave (THz) is electromagnetic radiation with a frequency between the microwave and infrared bands. Generally speaking, it refers to electromagnetic waves with a frequency between 0.1THz-10THz (that is, a wavelength of 0.03mm-3mm). It does not have the characteristics, such as coherence, broadband, transmittance and other advantages. It has important application prospects in the fields of material research, terahertz imaging, biological applications, industrial processing, national defense and security. [0003] Most of the existing terahertz time-domain spectroscopy systems use the photorectification effect to generate terahertz radiation. The nonlinear crystal growth cycle is long and expensive, making it difficult to use on a large s...

Claims

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Application Information

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IPC IPC(8): G01N21/3581
CPCG01N21/3581
Inventor 袁帅杜迎生聂源徐晖王瑾曾和平
Owner UNIV OF SHANGHAI FOR SCI & TECH
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