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Apparatus and method generating powerful terahertz emission

A terahertz radiation, super-powerful technology, applied in masers, laser components, electrical components, etc., can solve problems such as large volume, insufficient THz radiation efficiency, and difficult to control coherence

Inactive Publication Date: 2008-12-31
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above schemes generally require electron accelerator devices, which are expensive and bulky, and are difficult to obtain in small laboratories. At the same time, the efficiency of THz radiation is not high enough, and the coherence is difficult to control.

Method used

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  • Apparatus and method generating powerful terahertz emission
  • Apparatus and method generating powerful terahertz emission
  • Apparatus and method generating powerful terahertz emission

Examples

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Embodiment 1

[0040] The device for generating ultra-strong terahertz radiation in this embodiment includes a gas-filled tube, a pump laser and an ionization laser. Wherein, the sidewall of the gas-filled tube is made of a metal material with high reflectivity (such as reflectivity greater than 90%) to the pump laser (copper is used in this embodiment, other metals or alloys can also be used; in addition, as in the above-mentioned materials Surface gold plating can improve reflectivity). The two end faces (that is, the incident end face and the exit end face of the gas-filled tube) are both mirror faces, made of quartz glass and other materials with high transmittance to incident laser and THz radiation. The axis of the gas-filled tube is a straight line, and the axis forms an angle α with the incident end face of the gas-filled tube. The laser output direction of the incident laser is perpendicular to the incident end face. The laser output direction of the ionization laser is consistent...

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Abstract

The invention relates to a device which can generate high power Terahertz radiation and a method thereof. The device comprises a gas filling pipe, an ionizing laser which is used for outputting ionized laser pulse to form a vacuum layer and an ionized gas layer in the gas filling pipe and a pump laser which is used for outputting pump laser pulse to activate a plurality of coherent Terahertz radiations to overlay the radiations into a super high Terahertz radiation. The device and method of the invention have the technical effects that: plasma adopted in the invention is the fully ionized quasi neutral medium without threshold value in which the medium can be damaged by incident laser, and can generate THz radiation of 100MW. Through the control of the proper delay between two incident radiation pulses, the density of the gas inside the cavity of the pipe can be controlled to overlay by coherence and amplify the monocyclic Terahertz pulses generated in the cavity of the pipe and generate quasi monocyclic Terahertz pulses, and thereby the conversion efficiency is greatly improved and super high Terahertz radiation can be generated in a table site.

Description

technical field [0001] The invention belongs to the technical field of strong field and ultrafast physics, in particular, the invention relates to a device and method for generating high-power terahertz radiation. Background technique [0002] At present, the relevant terahertz (THz, 10 12 The generation and application of electromagnetic radiation (Hertz) have received extensive attention in the physics community. THz radiation has a frequency between visible light and microwaves. The phonon frequency of condensed matter and the vibrational frequency of macromolecules have many characteristic fingerprints in the THz band, and contain very rich physical and chemical information. Therefore, in the fields of physics, materials, biology, information, etc., scanning imaging and spectral detection of research objects with THz radiation has broad application prospects. However, because the THz radiation generated based on the interaction between laser and solid materials is lim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/108H01S3/098H01S3/081H01S1/00
Inventor 盛政明武慧春张杰
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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