The electro-optic spatial light modulator of lithium niobate metasurface based on plasmonic quasi-bound states in the continuum
Yao Ju, Hao Zhou, Yulei Huang, Yin Zhao, Xin Deng, Zuogang Yang, Fangjie Wang, Qiongqiong Gu, Guoliang Deng, Haoyi Zuo
Abstract
). The quasi-bound states in the continuum (quasi-BIC) are achieved in the metasurface. In addition, the plasmonic quasi-BIC and the guided-mode resonance (GMR) can be modulated by controlling the polarization of the incident light without any geometric adjustment. Thus, the working wavelength range from 1480 nm to 1620 nm was achieved, and the maximum resonance depth reached about 51% at the resonant wavelength. In addition, the insertion loss of the device was -2.8 dB at a wavelength of 1510 nm. Furthermore, the dynamic modulation speed reached up to 190 MHz and the highest signal-to-noise ratio (SNR) could reach about 49 dB at a frequency of 65 MHz. The data showed potential for the material for applications such as near-infrared imaging, beam steering, and free-space optical communication links.