Organic Crystals for THz Photonics

Organic Crystals for THz Photonics
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DOI：
10.21256/zhaw-4792
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发表时间：
2019-03
期刊：
Applied Sciences
影响因子：
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通讯作者：
M. Jazbinšek;Uroš Puc;Andreja Abina;A. Zidanšek
M. Jazbinšek;Uroš Puc;Andreja Abina;A. Zidanšek
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文献类型：
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作者：
M. Jazbinšek;Uroš Puc;Andreja Abina;A. Zidanšek

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具有二阶光学非线性的有机晶体具有很高的光学非线性和超快的光学非线性，因此在各种光子学应用中具有很大的吸引力。在过去的十年里，人们发现它们对太赫兹(THz)光子学特别有吸引力。这主要是由于这些晶体可以产生非常强烈和超宽带的太赫兹波。本文综述了用于太赫兹波产生和探测应用的有机晶体材料的最新进展和面临的挑战。我们讨论了它们的结构、固有性质以及与无机替代品相比的优势。分析比较了目前应用最广泛的DAST、DSTMS、OH1、HMQ-TMS和BNA等有机晶体的特性。我们总结了太赫兹波产生和探测的最重要的原理，以及基于差频产生和光学整流的有机太赫兹系统结构。此外，我们还给出了依赖有机晶体的非常强和超宽带太赫兹系统的最先进的例子。最后，我们介绍了由非常强的有机晶体太赫兹光源实现的非线性太赫兹光子学的一些最新突破性演示，以及在各种科学和技术应用中使用有机晶体作为太赫兹光源的太赫兹光谱和太赫兹成像的例子。
Organic crystals with second-order optical nonlinearity feature very high and ultra-fast optical nonlinearities and are therefore attractive for various photonics applications. During the last decade, they have been found particularly attractive for terahertz (THz) photonics. This is mainly due to the very intense and ultra-broadband THz-wave generation possible with these crystals. We review recent progress and challenges in the development of organic crystalline materials for THz-wave generation and detection applications. We discuss their structure, intrinsic properties, and advantages compared to inorganic alternatives. The characteristic properties of the most widely employed organic crystals at present, such as DAST, DSTMS, OH1, HMQ-TMS, and BNA are analyzed and compared. We summarize the most important principles for THz-wave generation and detection, as well as organic THz-system configurations based on either difference-frequency generation or optical rectification. In addition, we give state-of-the-art examples of very intense and ultra-broadband THz systems that rely on organic crystals. Finally, we present some recent breakthrough demonstrations in nonlinear THz photonics enabled by very intense organic crystalline THz sources, as well as examples of THz spectroscopy and THz imaging using organic crystals as THz sources for various scientific and technological applications.