范德华材料中巨大光学整流的太赫兹发射

IF 37.2 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Taketo Handa, Chun-Ying Huang, Yiliu Li, Nicholas Olsen, Daniel G. Chica, David D. Xu, Felix Sturm, James W. McIver, Xavier Roy, Xiaoyang Zhu
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引用次数: 0

摘要

二维范德华晶体的剥离和堆积为发现量子相创造了前所未有的机会。该领域发展的主要障碍是由于样品尺寸(10−6-10−5 m)和与低能激发相关的电磁辐射波长(10−4-10−3 m)不匹配而限制了光谱访问。在这里,我们介绍了铁电半导体NbOI2作为二维范德华材料,能够作为范德华太赫兹发射器工作。我们展示了NbOI2产生的强烈和宽带太赫兹,其光整流效率比ZnTe(目前的标准太赫兹发射器)高出一个数量级以上。此外,该NbOI2太赫兹发射器可以集成到范德华异质结构中,以实现目标范德华材料和器件的片上近场太赫兹光谱。我们的方法为二维范德华材料和量子物质提供了一种通用的光谱工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Terahertz emission from giant optical rectification in a van der Waals material

Terahertz emission from giant optical rectification in a van der Waals material

The exfoliation and stacking of two-dimensional van der Waals crystals have created unprecedented opportunities in the discovery of quantum phases. A major obstacle to the advancement of this field is the limited spectroscopic access due to a mismatch in the sample sizes (10−6–10−5 m) and the wavelengths (10−4–10−3 m) of electromagnetic radiation relevant to their low-energy excitations. Here we introduce ferroelectric semiconductor NbOI2 as a two-dimensional van der Waals material capable of operating as a van der Waals terahertz emitter. We demonstrate intense and broadband terahertz generation from NbOI2 with an optical rectification efficiency that is more than one order of magnitude higher than that of ZnTe, the current standard terahertz emitter. Moreover, this NbOI2 terahertz emitter can be integrated into van der Waals heterostructures to enable on-chip near-field terahertz spectroscopy of a target van der Waals material and device. Our approach provides a general spectroscopic tool for two-dimensional van der Waals materials and quantum matter.

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来源期刊
Nature Materials
Nature Materials 工程技术-材料科学:综合
CiteScore
62.20
自引率
0.70%
发文量
221
审稿时长
3.2 months
期刊介绍: Nature Materials is a monthly multi-disciplinary journal aimed at bringing together cutting-edge research across the entire spectrum of materials science and engineering. It covers all applied and fundamental aspects of the synthesis/processing, structure/composition, properties, and performance of materials. The journal recognizes that materials research has an increasing impact on classical disciplines such as physics, chemistry, and biology. Additionally, Nature Materials provides a forum for the development of a common identity among materials scientists and encourages interdisciplinary collaboration. It takes an integrated and balanced approach to all areas of materials research, fostering the exchange of ideas between scientists involved in different disciplines. Nature Materials is an invaluable resource for scientists in academia and industry who are active in discovering and developing materials and materials-related concepts. It offers engaging and informative papers of exceptional significance and quality, with the aim of influencing the development of society in the future.
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