非共线相位匹配条件下的级联太赫兹参数发生器

IF 1.8 3区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Sota Mine, Kodo Kawase, Kosuke Murate
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引用次数: 0

摘要

我们在太赫兹参数发生器中直接观测到了非共线相位匹配条件下以级联方式产生的太赫兹(THz)波。虽然人们已经广泛研究了由共线相位匹配引起的级联,但使用非共线相位匹配的级联,如使用我们的注入种子太赫兹参数发生器(is-TPG)的设备,却较少受到关注。然而,了解 is-TPG 级联不仅是进一步开发 THz 波源的需要,也是 THz 范围参量探测和放大的需要;直接观测是必不可少的。在这里,我们使用高功率种子束来有效地诱导级联;当晶体倾斜时,我们在端面附近探测到了新的高阶太赫兹波。据我们所知,以前的研究还没有描述过在非共线相位匹配条件下级联产生的 THz 波。我们提出的经验数据将大大有助于参数 TH 波产生的理论探索。我们的工作为提高 THz 源的输出功率铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Cascaded Terahertz Parametric Generation Under Noncollinear Phase-Matching Condition

Cascaded Terahertz Parametric Generation Under Noncollinear Phase-Matching Condition

We directly observed terahertz (THz) waves generated in a cascading manner under noncollinear phase-matching conditions in a THz parametric generator. Although cascading induced by collinear phase matching has been extensively studied, cascading featuring noncollinear phase matching, using devices such as our injection-seeded THz parametric generator (is-TPG), has received less attention. However, an understanding of is-TPG cascading is required not only for the further development of THz-wave sources but also for THz-range parametric detection and amplification; direct observations are essential. Here, we used a high-power seed beam to induce cascading efficiently; when the crystal was tilted, we detected new higher-order THz waves near the end face. To the best of our knowledge, no previous study has described THz waves generated by cascading under noncollinear phase-matching conditions. We present empirical data that will greatly aid the theoretical exploration of parametric TH-wave generation. Our work paves the way toward enhancement of the output powers of THz sources.

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来源期刊
Journal of Infrared, Millimeter, and Terahertz Waves
Journal of Infrared, Millimeter, and Terahertz Waves 工程技术-工程:电子与电气
CiteScore
6.20
自引率
6.90%
发文量
51
审稿时长
3 months
期刊介绍: The Journal of Infrared, Millimeter, and Terahertz Waves offers a peer-reviewed platform for the rapid dissemination of original, high-quality research in the frequency window from 30 GHz to 30 THz. The topics covered include: sources, detectors, and other devices; systems, spectroscopy, sensing, interaction between electromagnetic waves and matter, applications, metrology, and communications. Purely numerical work, especially with commercial software packages, will be published only in very exceptional cases. The same applies to manuscripts describing only algorithms (e.g. pattern recognition algorithms). Manuscripts submitted to the Journal should discuss a significant advancement to the field of infrared, millimeter, and terahertz waves.
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