Tunable VO2/Au hyperbolic metamaterial
Abstract
Vanadium dioxide (VO2) is known to have a semiconductor-to-metal phase transition at ∼68 °C. Therefore, it can be used as a tunable component of an active metamaterial. The lamellar metamaterial studied in this work is composed of subwavelength VO2 and Au layers and is designed to undergo a temperature controlled transition from the optical hyperbolic phase to the metallic phase. VO2 films and VO2/Au lamellar metamaterial stacks have been fabricated and studied in electrical conductivity and optical (transmission and reflection) experiments. The observed temperature-dependent changes in the reflection and transmission spectra of the metamaterials and VO2 thin films are in a good qualitative agreement with theoretical predictions. The demonstrated optical hyperbolic-to-metallic phase transition is a unique physical phenomenon with the potential to enable advanced control of light-matter interactions.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 08, 2016
- Source ID
- 10.1063/1.4954382
Entities
People
- A. Devine
- B. Mendoza
- Chan Kyaw
- M. A. Noginov
- R. B. van Dover
- Srujana Prayakarao
- V. Liberman
Organizations
- Air Force Office of Scientific Research
- Army Research Office
- Cornell University
- Division of Materials Research
- Massachusetts Institute of Technology
- Norfolk State University
- Office of Basic Energy Sciences
- United States Air Force