Antenna-assisted picosecond control of nanoscale phase transition in vanadium dioxide.

ABSTRACT: Nanoscale devices in which the interaction with light can be configured using external control signals hold great interest for next-generation optoelectronic circuits. Materials exhibiting a structural or electronic phase transition offer a large modulation contrast with multi-level optical switching and memory functionalities. In addition, plasmonic nanoantennas can provide an efficient enhancement mechanism for both the optically induced excitation and the readout of materials strategically positioned in their local environment. Here, we demonstrate picosecond all-optical switching of the local phase transition in plasmonic antenna-vanadium dioxide (VO₂) hybrids, exploiting strong resonant field enhancement and selective optical pumping in plasmonic hotspots. Polarization- and

SUBMITTER: Muskens OL 

PROVIDER: S-EPMC6059831 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature