研究双色场激发的气体灯丝的全空间太赫兹发射

IF 2.1 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Journal Pub Date : 2024-11-18 DOI:10.1109/JPHOT.2024.3500358

Huicheng Guo;Chengpu Liu

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引用次数: 0

摘要

本文采用有限差分时域（FDTD）方法，研究了基于光电流模型的双色场诱导微等离子体产生的太赫兹发射的全空间分布。结果表明，太赫兹发射主要集中在正向，极化方向与激发场相同。当发射角增大时，带宽变窄，峰值频率红移，发射强度减小，基于相干叠加机理可以准确解释得到的结果。此外，通过将理论结果与实验数据进行比较，证实了太赫兹发射在整个空间分布的正确性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Investigation of Entire-Space Terahertz Emission From Gas Filament Excited by a Two-Color Field

By using the finite-difference time-domain (FDTD) method, this paper studys the entire-space distribution of terahertz emission generated by a two-color field induced micro-plasma based on photocurrent model. The spatial distributions of terahertz spectra and waveforms versus emission angle are investigated in three planes perpendicular with each other for the first time, and the results show that terahertz emission mainly focuses on forward direction with polarization same as the excitation field. When emission angle increasing, the bandwidth narrows, the peak frequency red shifts, the emission intensity decreases, and the obtained results are accurately explained based on coherent superposition mechanism. In addition, through comparing theoretical results with experimental data, the correctness of terahertz emission distribution in entire space is comfirmed.

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来源期刊

IEEE Photonics Journal ENGINEERING, ELECTRICAL & ELECTRONIC-OPTICS

CiteScore

4.50

自引率

8.30%

发文量

489

审稿时长

1.4 months

期刊介绍： Breakthroughs in the generation of light and in its control and utilization have given rise to the field of Photonics, a rapidly expanding area of science and technology with major technological and economic impact. Photonics integrates quantum electronics and optics to accelerate progress in the generation of novel photon sources and in their utilization in emerging applications at the micro and nano scales spanning from the far-infrared/THz to the x-ray region of the electromagnetic spectrum. IEEE Photonics Journal is an online-only journal dedicated to the rapid disclosure of top-quality peer-reviewed research at the forefront of all areas of photonics. Contributions addressing issues ranging from fundamental understanding to emerging technologies and applications are within the scope of the Journal. The Journal includes topics in: Photon sources from far infrared to X-rays, Photonics materials and engineered photonic structures, Integrated optics and optoelectronic, Ultrafast, attosecond, high field and short wavelength photonics, Biophotonics, including DNA photonics, Nanophotonics, Magnetophotonics, Fundamentals of light propagation and interaction; nonlinear effects, Optical data storage, Fiber optics and optical communications devices, systems, and technologies, Micro Opto Electro Mechanical Systems (MOEMS), Microwave photonics, Optical Sensors.