Voltage switching of a VO2 memory metasurface using ionic gel

Journal Article (Journal Article)

We demonstrate an electrolyte-based voltage tunable vanadium dioxide (VO2) memory metasurface. Large spatial scale, low voltage, non-volatile switching of terahertz (THz) metasurface resonances is achieved through voltage application using an ionic gel to drive the insulator-to-metal transition in an underlying VO2 layer. Positive and negative voltage application can selectively tune the metasurface resonance into the "off" or "on" state by pushing the VO2 into a more conductive or insulating regime respectively. Compared to graphene based control devices, the relatively long saturation time of resonance modification in VO2 based devices suggests that this voltage-induced switching originates primarily from electrochemical effects related to oxygen migration across the electrolyte-VO2 interface. © 2014 AIP Publishing LLC.

Full Text

Duke Authors

Cited Authors

  • Goldflam, MD; Liu, MK; Chapler, BC; Stinson, HT; Sternbach, AJ; McLeod, AS; Zhang, JD; Geng, K; Royal, M; Kim, BJ; Averitt, RD; Jokerst, NM; Smith, DR; Kim, HT; Basov, DN

Published Date

  • July 28, 2014

Published In

Volume / Issue

  • 105 / 4

International Standard Serial Number (ISSN)

  • 0003-6951

Digital Object Identifier (DOI)

  • 10.1063/1.4891765

Citation Source

  • Scopus