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 (VO2). Perfect absorption peak exists around the wavelength of 5 μm when the excitation of magnetic resonance is supported with the insulating VO2 spacer layer. The wavelength-selective absorption is switched off when the magnetic resonance is disabled with metallic VO2 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.
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18 August 2014
Research Article|
August 19 2014
Switchable wavelength-selective and diffuse metamaterial absorber/emitter with a phase transition spacer layer
Hao Wang;
Hao Wang
School for Engineering of Matter, Transport and Energy,
Arizona State University
, Tempe, Arizona 85287, USA
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Yue Yang;
Yue Yang
School for Engineering of Matter, Transport and Energy,
Arizona State University
, Tempe, Arizona 85287, USA
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Liping Wang
Liping Wang
a)
School for Engineering of Matter, Transport and Energy,
Arizona State University
, Tempe, Arizona 85287, USA
Search for other works by this author on:
a)
E-mail: liping.wang@asu.edu. Tel: 1-480-727-8615.
Appl. Phys. Lett. 105, 071907 (2014)
Article history
Received:
May 19 2014
Accepted:
August 09 2014
Citation
Hao Wang, Yue Yang, Liping Wang; Switchable wavelength-selective and diffuse metamaterial absorber/emitter with a phase transition spacer layer. Appl. Phys. Lett. 18 August 2014; 105 (7): 071907. https://doi.org/10.1063/1.4893616
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