High performance vanadium dioxide based active nano plasmonic filter and switch

Abstract

We have designed a compact active nano-plasmonic waveguide-based filter and switch in a Fabry Perot structure, in which Vanadium dioxide (VO2) is used as the active material to form an Au/VO2/Au tri-layer structure, which is based on the effect of the electrical-driven phase transformation from the VO2 layer. The largest modulation depth and lowest insertion loss of the Au/VO2/Au tri-layer based FP resonator are 44.77 dB and 1.43 dB respectively in the near-infrared wavelength range from 1400 nm to 2100 nm. In addition, a moderate quality factor of 146 and a high figure-of-merit of 33.31 can be achieved by using a short nano-plasmonic waveguide. The compact size, wavelength tunability, high modulation depth and low insertion loss indicate that the proposed active nano-plasmonic waveguide can be used in a high-density integrated optical circuit.