Light absorption abilities of hypercrystals

  • Chaozhi Xu Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus
  • Andrey V. Novitsky Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

Abstract

Here, we employ the theory of electromagnetic waves in non-magnetic multilayer hypercrystals to determine their spectra and derive dispersion relations for ordinary and extraordinary waves. We demonstrate that the reflection of a hypercrystal vanishes, while the absorption increases, if its wave impedance is matched to that of the surrounding medium. We study the absorption properties of hypercrystals focusing on absorption dependence on thicknesses of available layers. We reveal that the peak values of absorption increase for thicker spacer layer, while the wavelength at the peak is red-shifted. Dependence on the filling fraction of metal is shown to be strongly dependent on the dispersive properties of hypercrystals exhibiting lower absorption for greater filling fractions, while the absorption peak value and absorption bandwidth can be tailored with number of layers. This research might be useful for maximsing absorption to achieve a broadband perfect absorber on the hypercrystal platform.

Author Biographies

Chaozhi Xu, Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

master’s degree student at the department of physical optics and applied informatics, faculty of physics

 

Andrey V. Novitsky, Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

doctor of science (physics and mathematics), docent; professor at the department of physical optics and applied informatics, faculty of physics

 

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Published
2024-06-04
Keywords: electromagnetic wave, hyperbolic metamaterial, hypercrystal, absorption, impedance
Supporting Agencies The research was supported by the Ministry of Education of the Republic of Belarus (assignment 2.2.3 of the state programme of scientific research «Photonics and electronics for innovations», 2021–2025; state registration No. 20211793).
How to Cite
Xu, C., & Novitsky, A. V. (2024). Light absorption abilities of hypercrystals. Journal of the Belarusian State University. Physics, 2, 4-10. Retrieved from https://journals.bsu.by/index.php/physics/article/view/6227
Issue
No 2 (2024): Journal of the Belarusian State University. Physics
Section
Optics and Spectroscopy

Copyright (c) 2024 Journal of the Belarusian State University. Physics

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