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Title: Switchable wavelength-selective and diffuse metamaterial absorber/emitter with a phase transition spacer layer

We numerically demonstrate a switchable metamaterial absorber/emitter by thermally turning on or off the excitation of magnetic resonance upon the phase transition of vanadium dioxide (VO{sub 2}). Perfect absorption peak exists around the wavelength of 5 μm when the excitation of magnetic resonance is supported with the insulating VO{sub 2} spacer layer. The wavelength-selective absorption is switched off when the magnetic resonance is disabled with metallic VO{sub 2} that shorts the top and bottom metallic structures. The resonance wavelength can be tuned with different geometry, and the switchable metamaterial exhibits diffuse behaviors at oblique angles. The results would facilitate the design of switchable metamaterials for active control in energy and sensing applications.
Authors:
; ;  [1]
  1. School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287 (United States)
Publication Date:
OSTI Identifier:
22310876
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; EXCITATION; LAYERS; MAGNETIC RESONANCE; PHASE TRANSFORMATIONS; SPACERS; SWITCHES; VANADIUM OXIDES; WAVELENGTHS