Terahertz switchable broadband linear-to-linear/ circular polarization converter based on vanadium dioxide

Zhenjie Feng; Bo Ni; Haibin Ni; Xiaoyan Zhou; Lingsheng Yang; Jianhua Chang

doi:10.1364/JOSAB.496216

Journal of the Optical Society of America B
Vol. 40,
Issue 8,
pp. 2174-2182
(2023)
•https://doi.org/10.1364/JOSAB.496216

Terahertz switchable broadband linear-to-linear/circular polarization converter based on vanadium dioxide

Zhenjie Feng, Bo Ni, Haibin Ni, Xiaoyan Zhou, Lingsheng Yang, and Jianhua Chang

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Zhenjie Feng, Bo Ni, Haibin Ni, Xiaoyan Zhou, Lingsheng Yang, and Jianhua Chang, "Terahertz switchable broadband linear-to-linear/ circular polarization converter based on vanadium dioxide," J. Opt. Soc. Am. B 40, 2174-2182 (2023)

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Abstract

In this paper, a terahertz (THz) polarization device that achieves four polarization conversion modes with high relative bandwidth and high performance by varying the phase transition properties of vanadium dioxide (${{\rm VO}_2}$) is investigated. In particular, when the device behaves as an orthogonal linear polarization converter, it has a polarization conversion ratio greater than 0.9, an operating bandwidth of 2.14 THz, and a relative bandwidth of 99.5%. In addition, the relationship between different polarization conversion modes of this polarization converter can be analyzed by the Jones matrix. The proposed ${{\rm VO}_2}$-based switchable THz polarization converter has important potential for applications in fields such as THz communication encryption and bio-detection.

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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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Refs.	Tunable Materials	Conversion Mode	Operating Bands (THz)	Working Efficiency	FBW
[20]	photosensitive silicon	LTL	6.62–10.44	$P C R > 0.9$	44.8%
		LTLC	5.64–9.2	$\| η \| > 0.95$	48%
		LTRC	10.76–11.18	$\| η \| > 0.95$	3.8%
[21]	${V O}_{2}$	LTL	0.668–0.942	$P C R > 0.94$	34%
		LTC	0.444–0.751	$\| η \| > 0.92$	12.8%
[23]	${V O}_{2}$	LTC/CTL	0.87–1.2	$P C R > 0.9$	31.9%
		LTL/CTC	0.65–1.45	$\| η \| > 0.9$	76.2%
[24]	${V O}_{2}$	LTL	1.15–1.95/4.2–4.4	$P C R > 0.9$	51.6%/4.7%
		LTC	2.1–2.5/3.8–4.1/4.6–4.8	$A R < 3 d B$	17.4%/7.6%/4.3%
[29]	graphene	LTL	13.94–17.52	$P C R > 0.8$	23%
		LTRC	14.24–15.75	$\| η \| > 0.95$	10%
		LTLC	17.02–17.48	$\| η \| > 0.95$	2.7%
[30]	graphene	LTL	1.38–1.85	$P C R > 0.9$	42%
		LTRC	1.12–1.72	$\| η \| > 0.9$	29%
		LTLC	1.38–1.72	$\| η \| > 0.9$	22%
[31]	graphene	LTL	0.39–1.22	$P C R > 0.9$	103%
		LTLC	1.57–2.74	$\| η \| > 0.9$	54%
		LTRC	1.13–1.59	$\| η \| > 0.9$	34%
This work	${V O}_{2}$	LTL/CTC	1.08–3.22	$P C R > 0.9$	99.5%
		LTC	1.38–2.99	$\| η \| > 0.95$	73.7%
		RCTL	1.42–2.98	$P C R > 0.983$	70.9%
		LCTL	1.35–2.99	$P C R > 0.979$	75.6%

Refs.	Tunable Materials	Conversion Mode	Operating Bands (THz)	Working Efficiency	FBW
[20]	photosensitive silicon	LTL	6.62–10.44	$P C R > 0.9$	44.8%
		LTLC	5.64–9.2	$\| η \| > 0.95$	48%
		LTRC	10.76–11.18	$\| η \| > 0.95$	3.8%
[21]	${V O}_{2}$	LTL	0.668–0.942	$P C R > 0.94$	34%
		LTC	0.444–0.751	$\| η \| > 0.92$	12.8%
[23]	${V O}_{2}$	LTC/CTL	0.87–1.2	$P C R > 0.9$	31.9%
		LTL/CTC	0.65–1.45	$\| η \| > 0.9$	76.2%
[24]	${V O}_{2}$	LTL	1.15–1.95/4.2–4.4	$P C R > 0.9$	51.6%/4.7%
		LTC	2.1–2.5/3.8–4.1/4.6–4.8	$A R < 3 d B$	17.4%/7.6%/4.3%
[29]	graphene	LTL	13.94–17.52	$P C R > 0.8$	23%
		LTRC	14.24–15.75	$\| η \| > 0.95$	10%
		LTLC	17.02–17.48	$\| η \| > 0.95$	2.7%
[30]	graphene	LTL	1.38–1.85	$P C R > 0.9$	42%
		LTRC	1.12–1.72	$\| η \| > 0.9$	29%
		LTLC	1.38–1.72	$\| η \| > 0.9$	22%
[31]	graphene	LTL	0.39–1.22	$P C R > 0.9$	103%
		LTLC	1.57–2.74	$\| η \| > 0.9$	54%
		LTRC	1.13–1.59	$\| η \| > 0.9$	34%
This work	${V O}_{2}$	LTL/CTC	1.08–3.22	$P C R > 0.9$	99.5%
		LTC	1.38–2.99	$\| η \| > 0.95$	73.7%
		RCTL	1.42–2.98	$P C R > 0.983$	70.9%
		LCTL	1.35–2.99	$P C R > 0.979$	75.6%

Abstract

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Equations (11)

Journal of the Optical Society of America B