Active directional switching of surface plasmon polaritons using a phase transition material.

ABSTRACT: Active switching of near-field directivity, which is an essential functionality for compact integrated photonics and small optoelectronic elements, has been challenging due to small modulation depth and complicated fabrication methods for devices including active optical materials. Here, we theoretically and experimentally realize a nanoscale active directional switching of surface plasmon polaritons (SPPs) using a phase transition material for the first time. The SPP switching device with noticeable distinction is demonstrated based on the phase transition of vanadium dioxide (VO₂) at the telecom wavelength. As the insulator-to-metal phase transition (IMT) of VO₂ induces the large change of VO₂ permittivity at telecom wavelengths, the plasmonic response of

SUBMITTER: Kim SJ 

PROVIDER: S-EPMC5338025 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature