Polarization-multiplexing achromatic metasurfaces for manipulation of terahertz waves

Chong Qin; Chong Qin; Wenhui Fan; Wenhui Fan; Wenhui Fan; Qi Wu; Qi Wu; Xiaoqiang Jiang; Xiaoqiang Jiang; Hui Yan; Hui Yan

doi:10.1364/JOSAB.462959

Journal of the Optical Society of America B
Vol. 39,
Issue 9,
pp. 2378-2386
(2022)
•https://doi.org/10.1364/JOSAB.462959

Polarization-multiplexing achromatic metasurfaces for manipulation of terahertz waves

Chong Qin, Wenhui Fan, Qi Wu, Xiaoqiang Jiang, and Hui Yan

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Chong Qin, Wenhui Fan, Qi Wu, Xiaoqiang Jiang, and Hui Yan, "Polarization-multiplexing achromatic metasurfaces for manipulation of terahertz waves," J. Opt. Soc. Am. B 39, 2378-2386 (2022)

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Abstract

Metasurfaces that can effectively manipulate electromagnetic waves provide a novel solution to realize efficient terahertz functional devices. However, the chromatic aberration of metasurfaces is a remarkable challenge for their extensive applications. Multi-functional metasurfaces are highly desirable in practical applications. Here, we demonstrate polarization-multiplexing achromatic metasurfaces working in the terahertz regime based on anisotropic meta-atoms which exhibit the form birefringence. Specifically, a polarization-multiplexing achromatic metalens working in the frequency range from 0.8 THz to 1.2 THz is proposed and verified numerically, which can focus terahertz waves within the working bandwidth to different focal planes by varying the polarization state of an incident terahertz wave; the deviation of focal length is less than 8.88% across the whole working bandwidth. In addition, a polarization-multiplexing achromatic deflector working in the frequency range from 0.8 THz to 1.2 THz is also designed and simulated, which can deflect a terahertz wave within the working bandwidth to different directions by manipulating the polarization state of an incident terahertz wave. The metasurfaces demonstrated here are of great significance for the development of ultra-compact, flexible, and multi-functional terahertz devices based on metasurfaces.

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Data availability

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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$r$ (µm)	$D_{x}$ (µm)	$D_{y}$ (µm)	$r$ (µm)	$D_{x}$ (µm)	$D_{y}$ (µm)
0	84	68	1300	78	54
100	84	68	1400	78	52
200	84	68	1500	60	92
300	82	68	1600	58	90
400	84	66	1700	58	86
500	82	66	1800	58	80
600	84	64	1900	58	74
700	82	64	2000	58	68
800	82	62	2100	58	64
900	82	60	2200	56	60
1000	82	58	2300	56	56
1100	80	58	2400	56	50
1200	80	56	2500	56	44

$x$ (µm)	$D_{x}$ (µm)	$D_{y}$ (µm)	$x$ (µm)	$D_{x}$ (µm)	$D_{y}$ (µm)
0	80	80	1000	62	70
100	76	84	1100	60	72
200	72	88	1200	56	78
300	68	92	1300	54	82
400	86	52	1400	52	86
500	82	54	1500	92	68
600	78	56	1600	88	72
700	72	60	1700	84	76
800	70	62	1800	80	80
900	64	66

$r$ (µm)	$D_{x}$ (µm)	$D_{y}$ (µm)	$r$ (µm)	$D_{x}$ (µm)	$D_{y}$ (µm)
0	84	68	1300	78	54
100	84	68	1400	78	52
200	84	68	1500	60	92
300	82	68	1600	58	90
400	84	66	1700	58	86
500	82	66	1800	58	80
600	84	64	1900	58	74
700	82	64	2000	58	68
800	82	62	2100	58	64
900	82	60	2200	56	60
1000	82	58	2300	56	56
1100	80	58	2400	56	50
1200	80	56	2500	56	44

$x$ (µm)	$D_{x}$ (µm)	$D_{y}$ (µm)	$x$ (µm)	$D_{x}$ (µm)	$D_{y}$ (µm)
0	80	80	1000	62	70
100	76	84	1100	60	72
200	72	88	1200	56	78
300	68	92	1300	54	82
400	86	52	1400	52	86
500	82	54	1500	92	68
600	78	56	1600	88	72
700	72	60	1700	84	76
800	70	62	1800	80	80
900	64	66

Abstract

Data availability

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Figures (7)

Tables (2)

Equations (4)

Journal of the Optical Society of America B