论文标题
全光散射控制中的全电向准完美吸收huygens metasurface
All-optical scattering control in an all-dielectric quasi-perfect absorbing Huygens metasurface
论文作者
论文摘要
在本文中，我们从理论上和实验上证明了来自准完美吸收基于硅的跨表面的前向和向后散射强度的光热诱导的非线性。在激光照射下，通过光热效应有效地加热了元表面，从而通过热光效应调节散射光谱。在几毫瓦的连续波激发下，向后散射的横截面双打，向前散射横截面减少到一半。我们的研究打开了散射方向性的全光动力控制，该控制将适用于硅光子设备。
In this paper, we theoretically and experimentally demonstrated photothermally-induced nonlinearities of both forward and backward scattering intensities from quasi-perfect absorbing silicon-based metasurface. The metasurface is efficiently heated up by photothermal effect under laser irradiation, which in turn modulates the scattering spectra via thermo-optical effect. Under a few milliwatt continuous-wave excitation, backward scattering cross-section doubles, and forward scattering cross-section reduces to half. Our study opens up the all-optical dynamical control of the scattering directionality, which would be applicable to silicon photonic devices.
