Dynamic metamaterial perfect absorber based on VO2 phase transition

Jing Ma; Chen Wang; Tiezhu Bo

doi:10.1117/12.2617893

15 February 2022 Dynamic metamaterial perfect absorber based on VO₂ phase transition

Jing Ma, Chen Wang, Tiezhu Bo

Proceedings Volume 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021); 121666T (2022) https://doi.org/10.1117/12.2617893
Event: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 2021, Hong Kong, Hong Kong

Abstract

The dynamic tunable performance of metamaterial absorbers generally refers to changing the response frequency or absorption rate (transmission or reflectivity) of the absorbers to the incident electromagnetic wave in real time by certain means. In the field of communication, it is necessary to make a real-time response to the incident electromagnetic wave according to the change of conditions, which requires the metamaterial absorbers to dynamically tune the spectrum, such as modulators, filters, optical switches and so on. The successful realization of the performance will be of great significance in the practical application of metamaterial absorbers. Based on the principle of VO₂ phase transition, a “perfect” absorbing metamaterial with resonant frequency in infrared band is proposed. When vanadium dioxide is adjusted to the metal state, the absorber has the performances of polarization-insensitivity, wide angle, dynamic tenability and absorption up to 99.5% at 5.25μm. Furthermore, it can be tuned arbitrarily in the range of 4μm to 5.8μm with the absorption remaining above 92% by changing its geometric parameters. The absorber remains absorptivity of over 83% with incident angles below 60° under transverse magnetic (TM) polarization and that of over 89% below 50° under transverse electric (TE) polarization. Meanwhile, the absorber is polarization insensitive when the resonant wavelength is 5.25 μm and the polarization angle is between 0 and 90°. As a verification, the real part of the relative impedance of the absorber is close to 1, that is, a successful impedance matching is achieved between the resonant wavelength and the free space.

Citation Download Citation

Jing Ma, Chen Wang, and Tiezhu Bo "Dynamic metamaterial perfect absorber based on VO₂ phase transition", Proc. SPIE 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 121666T (15 February 2022); https://doi.org/10.1117/12.2617893

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KEYWORDS

Absorption

Metamaterials

Electromagnetic radiation

Metals

Polarization

Vanadium

Dielectrics

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