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Title: A terahertz Brewster switch based on superconductor hyperbolic metamaterial
Authors: Sreekanth, Kandammathe Valiyaveedu
Mahalakshmi, P.
Han, Song
Vigneswaran, D.
Rajan, M. S. Mani
Jha, Rajan
Singh, Ranjan
Keywords: Science::Physics
Issue Date: 2020
Source: Sreekanth, K. V., Mahalakshmi, P., Han, S., Vigneswaran, D., Rajan, M. S. M., Jha, R., & Singh, R. (2020). A terahertz Brewster switch based on superconductor hyperbolic metamaterial. Journal of Applied Physics, 128(17), 173106-. doi:10.1063/5.0025925
Project: RG191/17
Journal: Journal of Applied Physics
Abstract: Active polarization switching devices are important to control the polarization state of light including terahertz (THz) waves that are technologically challenging to manipulate. Here, we propose and numerically demonstrate a hyperbolic metamaterial-based (HMM-based) active Brewster polarization switch for the intensity and phase modulation of THz light. The proposed multilayered HMM consists of alternating thin layers of high temperature superconductors such as yttrium barium copper oxide and dielectric materials such as lanthanum aluminate. The HMM shows elliptical dispersion above the superconducting phase transition temperature and type II hyperbolic dispersion in the superconducting state. By varying the temperature from the dielectric to the superconducting phase of the HMM, we demonstrate above 98% THz intensity modulation and 100% phase tunability (180°) at Brewster’s angle. The proposed HMM can work as an efficient reflective THz modulator by properly selecting the angle of incidence.
ISSN: 0021-8979
DOI: 10.1063/5.0025925
Rights: © 2020 The Author(s). All rights reserved. This paper was published by AIP Publishing in Journal of Applied Physics and is made available with permission of The Author(s).
Fulltext Permission: open
Fulltext Availability: With Fulltext
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