Abstract

Recently reported active metamaterial analogues of electromagnetically induced transparency (EIT) are promising in developing novel optical components, such as active slow light devices. Through integrating materials susceptible to optical intensity, the self-resonance and mode coupling of individual meta-atoms can be tailored with different excitations. Here we present the manipulation of resonance properties in the terahertz regime by integrating photoactive silicon into the metamaterial unit cell, realizing on-to-off switching responses or frequency tuning. These straightforward approaches may enable novel tunable devices for integrated plasmonic circuits.

© 2017 Optical Society of America