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 VO2 is a metal, but it shifts to 15.1 μm when VO2 changes 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 VO2 but 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.
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28 September 2014
Research Article|
September 23 2014
Wavelength-tunable infrared metamaterial by tailoring magnetic resonance condition with VO2 phase transition
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
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a)
Author to whom correspondence should be addressed. Electronic mail: liping.wang@asu.edu
J. Appl. Phys. 116, 123503 (2014)
Article history
Received:
August 08 2014
Accepted:
September 15 2014
Citation
Hao Wang, Yue Yang, Liping Wang; Wavelength-tunable infrared metamaterial by tailoring magnetic resonance condition with VO2 phase transition. J. Appl. Phys. 28 September 2014; 116 (12): 123503. https://doi.org/10.1063/1.4896525
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