【摘 要】
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Nonlinear plasmonic metasurfaces are compatible with complementary metal oxide semiconductor technology and highly promising for on-chip optical switching and modulations and nanoscale frequency conversions.However,the low nonlinear-optical response of me
【机 构】
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Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzh
【出 处】
：
中国科学：物理学 力学 天文学（英文版）
论文部分内容阅读
Nonlinear plasmonic metasurfaces are compatible with complementary metal oxide semiconductor technology and highly promising for on-chip optical switching and modulations and nanoscale frequency conversions.However,the low nonlinear-optical response of metasurface devices limits their practical applications.To circumvent this constraint,we propose the design ofa nanocavity plasmonic metasurface,in which the strong light localization in the nanocavity can be used to boost the efficiency of second-harmonic generation.Compared with the single-layer counterpart,experimental results show that the intensity of the second-harmonic waves in the nanocavity metasurface is enhanced by ～790 times.The proposed nanocavity plasmonic meta-surfaces in this work may open new routes for developing highly efficient nonlinear metacrystals for on-chip nonlinear sources,nonlinear image encryption,information processing,and so on.
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