圆二色性
二向色玻璃
电介质
等离子体子
物理
基质(水族馆)
二次谐波产生
光学
光电子学
铌酸锂
金属
材料科学
化学
结晶学
海洋学
地质学
冶金
激光器
作者
Kwang‐Hyon Kim,Ju-Ryong Kim
标识
DOI:10.1002/andp.202000078
摘要
Abstract Dielectric chiral metasurfaces can generate harmonic waves with high efficiency and strong circular dichroism (CD), when they are supported by metallic substrates. Numerical results show that the second‐harmonic generation (SHG) efficiency of about 10 −3 % for a peak pump intensity of about 5 GW cm −2 can be achieved in the blue‐UV, and the SHG CD reaches up to about 1.8, from a metasurface of Z‐shaped lithium niobate nanoantenna array supported by gold substrate. Highly efficient and strong circular dichroic nonlinear responses are attributed to the plasmon‐assisted local field enhancement in the dielectric chiral nanoantennae adjacent to the metallic substrate.
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