Lattice Enhanced Terahertz Modulator Based on Metal-Silicon Hybrid Metasurface
摘要
Via the combination of various modes, light-matter interaction (LMI) is enhanced to trigger desired resonances with high quality factors (QF) for nonlinear optical systems and ultrasensitive sensors. However, directly enhancing LMI and flexibly controlling electromagnetic radiation cost significant efforts. Here, based on a metal-silicon hybrid metasurface with dual-mode resonances, we propose and experimentally demonstrate the lattice mode as a straight solution to strengthen LMI. The coupling of lattice mode enables QF > 10 for high-order resonance and a 2.6-fold increase in QF with intensity above 0.63 for the low-order one. Bridging a straightforward way to elevate LMI and modulated capabilities without additional complication, this work also offers a potential strategy for advanced optical computers, forthcoming new generational communication, and ultra-sensitive sensing.