Active control of broadband plasmon induced transparency window and amplitude modulation based on embedded-vanadium-dioxide metamaterials

A Vanadium-Dioxide (VO2)-embedded metamaterial is designed to achieve amplitude modulation and on-off switch at plasmon induced transparency window. With conductivity of VO2 across the phase transition by thermal and electrical stimuli, mode switch between PIT and dipole mode can be achieved. The amplitude modulation depth and the maximum frequency width at half-maximum are 77.58% and 0.4 THz, respectively. Such VO2 embedded PIT modulator is useful for manipulating terahertz radiation in various practical applications.