Journal
NANOPHOTONICS
Volume 11, Issue 9, Pages 1847-1862Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/nanoph-2021-0714
Keywords
extreme THz; lithium niobate; local field enhancement; nonlinear metasurface; strong-field THz radiation; tilted pulse front
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Funding
- National Natural ScienceFoundation of China [61905007, 11827807, 62005140]
- National Key RD Project [2019YFB2203102]
- Open Project Program of Wuhan National Laboratory for Optoelectronics [2018WNLOKF001]
- Open Fund of Guangdong Provincial Key Laboratory of Information Photonics Technology (Guangdong University of Technology) [GKPT20]
- China Postdoctoral Science Foundation [2020M670310]
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Extremely nonlinear terahertz (THz)-matter interactions and applications have become the next frontier in quantum information, nonlinear optics, and particle acceleration. However, the lack of highly intense THz sources and the diffraction limit hinder the growth of extreme THz. To address this issue, researchers are developing highly concentrated THz sources and utilizing resonant artificial structures to enhance local fields.
Extremely nonlinear terahertz (THz)-matter interactions and applications have positioned themselves as the next frontier in quantum information, nonlinear optics, and particle acceleration. However, the absence of free-space highly intense THz sources and the diffraction limit, which prevents THz waves from being concentrated to the nanoscale scale, are inhibiting the growth of extreme THz. To address this difficulty, suitably extremely concentrated THz sources are being produced, while (non-)resonant artificial metastructures are being widely used to enhance local fields, resulting in deep-subwavelength (
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