Single and cascaded, magnetically controllable metasurfaces as terahertz filters

Andriy E. Serebryannikov; Akhlesh Lakhtakia; Ekmel Ozbay

doi:10.1364/JOSAB.33.000834

Journal of the Optical Society of America B
Vol. 33,
Issue 5,
pp. 834-841
(2016)
•https://doi.org/10.1364/JOSAB.33.000834

Single and cascaded, magnetically controllable metasurfaces as terahertz filters

Andriy E. Serebryannikov, Akhlesh Lakhtakia, and Ekmel Ozbay

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Andriy E. Serebryannikov, Akhlesh Lakhtakia, and Ekmel Ozbay, "Single and cascaded, magnetically controllable metasurfaces as terahertz filters," J. Opt. Soc. Am. B 33, 834-841 (2016)

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Table of Contents Category
- Instrumentation, Measurement, and Metrology
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About this Article
History
- Original Manuscript: January 26, 2016
- Revised Manuscript: March 7, 2016
- Manuscript Accepted: March 10, 2016
- Published: April 7, 2016

Abstract

Transmission of a normally incident, linearly polarized, plane wave through either a single electrically thin metasurface comprising H-shaped subwavelength resonating elements made of magnetostatically controllable InAs or a cascade of several such metasurfaces was simulated in the terahertz regime. Stop bands that are either weakly or strongly controllable can be exhibited by a single metasurface by proper choice of the orientation of the magnetostatic field, and a $\sim 19 %$ downshift of stop bands in the 0.1–5.5 THz spectral regime is possible on increasing the magnetostatic field strength from 0 to 1 T. Better controllability and wider bandwidths are possible by increasing the number of metasurfaces in a cascade, although increase of the total losses can lead to some restrictions. ON/OFF switching regimes, realizable either by applying/removing the magnetostatic field or just by changing its orientation, exist.

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	Faraday		Voigt-X		Voigt-Y
$B_{0} (T)$	$\| τ_{x x} \|$	$\| τ_{y y} \|$	$\| τ_{x x} \|$	$\| τ_{y y} \|$	$\| τ_{x x} \|$	$\| τ_{y y} \|$
0	1.81	3.59	1.81	3.59	1.81	3.59
0.2	1.80	3.59	1.82	3.60	1.81	3.62
0.4	1.75	3.51	1.82	3.54	1.79	3.64
0.6	1.67	3.37	1.82	3.43	1.75	3.65
0.8	1.58	3.21	1.81	3.30	1.69	3.64
1.0	1.48	3.03	1.79	3.13	1.63	3.64
2.0	1.02	2.17	1.64	2.34	1.29	3.58

	Faraday		Voigt-X		Voigt-Y
$B_{0} (T)$	$\| τ_{x x} \|$	$\| τ_{y y} \|$	$\| τ_{x x} \|$	$\| τ_{y y} \|$	$\| τ_{x x} \|$	$\| τ_{y y} \|$
0	2.03	4.02	2.03	4.02	2.03	4.02
0.2	2.03	4.03	2.05	4.03	2.03	4.07
0.4	1.98	3.94	2.05	3.97	2.01	4.09
0.6	1.90	3.78	2.05	3.85	1.97	4.10
0.8	1.80	3.58	2.4	3.69	1.91	4.10
1.0	1.68	3.36	2.02	3.50	1.83	4.10
2.0	1.17	2.39	1.84	2.58	1.44	4.02

	Faraday		Voigt-X		Voigt-Y
$B_{0} (T)$	$\| τ_{x x} \|$	$\| τ_{y y} \|$	$\| τ_{x x} \|$	$\| τ_{y y} \|$	$\| τ_{x x} \|$	$\| τ_{y y} \|$
0	1.81	3.59	1.81	3.59	1.81	3.59
0.2	1.80	3.59	1.82	3.60	1.81	3.62
0.4	1.75	3.51	1.82	3.54	1.79	3.64
0.6	1.67	3.37	1.82	3.43	1.75	3.65
0.8	1.58	3.21	1.81	3.30	1.69	3.64
1.0	1.48	3.03	1.79	3.13	1.63	3.64
2.0	1.02	2.17	1.64	2.34	1.29	3.58

	Faraday		Voigt-X		Voigt-Y
$B_{0} (T)$	$\| τ_{x x} \|$	$\| τ_{y y} \|$	$\| τ_{x x} \|$	$\| τ_{y y} \|$	$\| τ_{x x} \|$	$\| τ_{y y} \|$
0	2.03	4.02	2.03	4.02	2.03	4.02
0.2	2.03	4.03	2.05	4.03	2.03	4.07
0.4	1.98	3.94	2.05	3.97	2.01	4.09
0.6	1.90	3.78	2.05	3.85	1.97	4.10
0.8	1.80	3.58	2.4	3.69	1.91	4.10
1.0	1.68	3.36	2.02	3.50	1.83	4.10
2.0	1.17	2.39	1.84	2.58	1.44	4.02

Abstract

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Equations (3)

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