High-performance circular polarization modulation using a dielectric metasurface

Shahid Hussain; Shahid Hussain; Shahid Hussain; Ruonan Ji; Shaowei Wang; Shaowei Wang; Shaowei Wang; Shaowei Wang

doi:10.1364/AO.491366

Applied Optics
Vol. 62,
Issue 18,
pp. 4860-4865
(2023)
•https://doi.org/10.1364/AO.491366

High-performance circular polarization modulation using a dielectric metasurface

Shahid Hussain, Ruonan Ji, and Shaowei Wang

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Shahid Hussain, Ruonan Ji, and Shaowei Wang, "High-performance circular polarization modulation using a dielectric metasurface," Appl. Opt. 62, 4860-4865 (2023)

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Abstract

We demonstrate a chiral metasurface that exhibits a giant chiroptical response as well as functions as an optical diode due to geometrical asymmetry for circularly polarized light (CPL). Engineering the Mie-type multipole radiation using geometrical features led to performance values in terms of near-unity transmission and circular dichroism (CD) efficiency (about 0.96) and an extinction ratio of ${\sim}{3.8} \times {{10}^4}$ for 1550 nm wavelength. A continuous stopband of 1538–1556 nm is achieved for an unchosen component of CPL while keeping the transmission efficiency of the chosen CPL component larger than 0.9. Because of the high extinction ratio and CD efficiency, the proposed metasurface has the potential for chiroptical applications including high-contrast polarization imaging, precise Stokes parameters measurement, optical diodes, and polarization detection for CPL.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Wavelength (µm)	Structure [References]	Metamaterial Composition	Transmission Efficiency	$\| C D \|$	AT	CPER
0.582	Twisted arrays [16]	Plasmonic	$≃ 0.87$	$≃ 0.78$	N. A.	$≃ 9.6$
1.30	Twisted arcs [17]	Plasmonic	$≃ 0.70$	$≃ 0.64$	N. A.	$≃ 11.6$
1. 55	S-shaped [19]	Plasmonic	$≃ 0.91$	$≃ 0.87$	$≃ 0.87$	$≃ 22.7$
3.83	Cross-shaped [20]	Plasmonic	$≃ 0.11$	$≃ 0.11$	N. A.	$≃ 300$
4.00	Nanoantenna [21]	Plasmonic	$≃ 0.90$	$≃ 0.90$	N. A.	$≃ 400$
1.47	Nanopillars [22]	Dielectric-metal	$≃ 0.85$	$≃ 0.848$	N. A.	$≃ 400$
1.55	Nanowires [23]	Dielectric-metal	$≃ 0.965$	$≃ 0.965$	N.A.	$≃ 1200$
1.655	$z$ -shaped medium [27]	Dielectric	$≃ 0.95$	$≃ 0.88$	$≃ 0.78$	$≃ 13.5$
0.997, 1.042, 1.055	Elliptical cylinders [28]	Dielectric	$≃ 0.895, ≃ 0.800, ≃ 0.965$	$≃ 0.825, ≃ 0.720, ≃ 0.955$	$≃ - 0.83, ≃ - 0.68, ≃ 0.94$	$≃ 12.8, ≃ 10, ≃ 96.5$
1.50	$z$ -shaped etch [31]	Dielectric	$≃ 0.97$	$≃ 0.967$	N. A.	$≃ 345$
0.545	Gammadion [32]	Dielectric	$≃ 0.95$	$≃ 0.92$	N. A.	$≃ 31.6$
1.55	Deformed H-shaped (this work)	Dielectric	$≃ 0.96$	$≃ 0.96$	$≃ 0.92$	$≃ 3.8 \times 10^{4}$

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Applied Optics