Wavelength-tunable infrared metamaterial by tailoring magnetic resonance condition with VO2phase transition

Hao Wang, Yue Yang, Liping Wang

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

In this work, we report the design of a wavelength-tunable infrared metamaterial by tailoring magnetic resonance condition with the phase transition of vanadium dioxide (VO2). Numerical simulation based on the finite-difference time-domain method shows a broad absorption peak at the wavelength of 10.9 μm when VO2is a metal, but it shifts to 15.1 μm when VO2changes to dielectric phase below its phase transition temperature of 68 °C. The large tunability of 38.5% in the resonance wavelength stems from the different excitation conditions of magnetic resonance mediated by plasmon in metallic VO2but optical phonons in dielectric VO2. The physical mechanism is elucidated with the aid of electromagnetic field distribution at the resonance wavelengths. A hybrid magnetic resonance mode due to the plasmon-phonon coupling is also discussed. The results here would be beneficial for active control of thermal radiation in novel electronic, optical, and thermal devices.

Original languageEnglish (US)
Article number123503
JournalJournal of Applied Physics
Volume116
Issue number12
DOIs
StatePublished - Jan 1 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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