Terahertz Generation from GaAs Metasurfaces: Role of Surface Nonlinearity

Lucy L Hale,Hyunseung Jung,Sylvain Gennaro,Jayson Briscoe,Charles Thomas Harris,Ting Shan Luk,Sadhvikas J Addamane,John L Reno,Igal Brener,Oleg Mitrofanov

Conference on Lasers and Electro-Optics（2022）

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摘要

We show that a GaAs metasurface can generate THz radiation with comparable efficiency to a bulk GaAs crystal. We attribute the enhanced generation to second order nonlinearity with the surface making a strong contribution.

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关键词

terahertz generation,surface nonlinearity,enhanced generation,second order nonlinearity,THz radiation,GaAs

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