A terahertz Brewster switch based on superconductor hyperbolic metamaterial
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 swi...
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sg-ntu-dr.10356-1458942023-02-28T19:25:39Z A terahertz Brewster switch based on superconductor hyperbolic metamaterial Sreekanth, Kandammathe Valiyaveedu Mahalakshmi, P. Han, Song Vigneswaran, D. Rajan, M. S. Mani Jha, Rajan Singh, Ranjan School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies (CDPT) The Photonics Institute Science::Physics Terahertz Superconductor 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. Ministry of Education (MOE) Published version The authors acknowledge the Singapore Ministry of Education (MOE) under Grant Nos. AcRF Tier 1 RG191/17, MOE2017-T2-1-110 and MOE2016-T3-1-006(S) for funding this research. Also, the authors acknowledge DST-SERB under the scheme of AISTDF (Grant No. IMRC/AISTDF/R&D/P-15/2018) toward partial support for conducting the work. The authors thank Dr. Yogesh Kumar Srivastava from SPMS, NTU, for proving the optical constants of YBCO and LAO thin films. R.J. and R.S. acknowledge the SPARC program of MHRD, India, for this joint work. 2021-01-14T01:15:23Z 2021-01-14T01:15:23Z 2020 Journal Article 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 0021-8979 https://hdl.handle.net/10356/145894 10.1063/5.0025925 17 128 en RG191/17 MOE2017-T2-1-110 MOE2016-T3-1-006 Journal of Applied Physics © 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). application/pdf |
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Science::Physics Terahertz Superconductor Sreekanth, Kandammathe Valiyaveedu Mahalakshmi, P. Han, Song Vigneswaran, D. Rajan, M. S. Mani Jha, Rajan Singh, Ranjan A terahertz Brewster switch based on superconductor hyperbolic metamaterial |
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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. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Sreekanth, Kandammathe Valiyaveedu Mahalakshmi, P. Han, Song Vigneswaran, D. Rajan, M. S. Mani Jha, Rajan Singh, Ranjan |
format |
Article |
author |
Sreekanth, Kandammathe Valiyaveedu Mahalakshmi, P. Han, Song Vigneswaran, D. Rajan, M. S. Mani Jha, Rajan Singh, Ranjan |
author_sort |
Sreekanth, Kandammathe Valiyaveedu |
title |
A terahertz Brewster switch based on superconductor hyperbolic metamaterial |
title_short |
A terahertz Brewster switch based on superconductor hyperbolic metamaterial |
title_full |
A terahertz Brewster switch based on superconductor hyperbolic metamaterial |
title_fullStr |
A terahertz Brewster switch based on superconductor hyperbolic metamaterial |
title_full_unstemmed |
A terahertz Brewster switch based on superconductor hyperbolic metamaterial |
title_sort |
terahertz brewster switch based on superconductor hyperbolic metamaterial |
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2021 |
url |
https://hdl.handle.net/10356/145894 |
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1759854812183134208 |