Design of an optically transparent and broadband absorber based on a multi-objective optimization algorithm

Yulin Zhao; Jiahui Fu; Qunhao Zhang; Hao Feng; Wei Wei; Wan Chen; Kuang Zhang; Qun Wu

doi:10.1364/OL.524371

Optics Letters
Vol. 49,
Issue 11,
pp. 2942-2945
(2024)
•https://doi.org/10.1364/OL.524371

Design of an optically transparent and broadband absorber based on a multi-objective optimization algorithm

Yulin Zhao, Jiahui Fu, Qunhao Zhang, Hao Feng, Wei Wei, Wan Chen, Kuang Zhang, and Qun Wu

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Yulin Zhao, Jiahui Fu, Qunhao Zhang, Hao Feng, Wei Wei, Wan Chen, Kuang Zhang, and Qun Wu, "Design of an optically transparent and broadband absorber based on a multi-objective optimization algorithm," Opt. Lett. 49, 2942-2945 (2024)

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Abstract

In this Letter, an optically transparent and broadband absorber designed using a multi-objective genetic algorithm (MOGA) is proposed. The absorption of the multilayer lossy frequency selective surface-based absorber is calculated by multilayer absorption equations and equivalent circuit models. To solve the problem of the unbalanced structure absorption bandwidth and thickness, an algorithm is used for optimizing the geometric and sheet resistance parameters of the structure. A multilayer and optically transparent absorber with 90% absorption bandwidth covering a frequency range of 2–18 GHz (S-band to Ku-band) is developed based on the MOGA design method with optical transmittance of 60%. Its total thickness consists of a wavelength of only 0.095, and it has high oblique incidence stability, which makes it useful in the stealth technology and transparent electromagnetic shielding applications.

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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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Parameter	$p$	$g_{1}$	$s_{1}$	$d_{2}$	$g_{3}$	$s_{3}$	$h_{1}$
Value (mm)	17.6	0.6	7.2	13.1	7.4	2.5	4.6
Parameter	$h_{2}$	$h_{3}$	$t$	$t_{1}$	$t_{2}$	$t_{3}$	—
Value (mm)	4.6	4.6	0.175	0.05	0.125	0.125	—

Ref.	Bandwidth	Thickness	Optical Transmittance	Oblique Incidence
[3]	10–75.5 (153%)	$0.1 λ_{L}$	60%	$30^{\circ}$
[10]	4.3–11.1 (88.3%)	$0.138 λ_{L}$	69.4%	$60^{\circ}$
[11]	8.3–17.4 (70.8%)	$0.107 λ_{L}$	77%	$30^{\circ}$
[12]	3.9–15 (118.1%)	$0.079 λ_{L}$	53%	$30^{\circ}$
[13]	8.0–18 (76.9%)	$0.12 λ_{L}$	80.2%	$30^{\circ}$
This work	2–18 (160%)	$0.095 λ_{L}$	60%	$45^{\circ}$

Parameter	$p$	$g_{1}$	$s_{1}$	$d_{2}$	$g_{3}$	$s_{3}$	$h_{1}$
Value (mm)	17.6	0.6	7.2	13.1	7.4	2.5	4.6
Parameter	$h_{2}$	$h_{3}$	$t$	$t_{1}$	$t_{2}$	$t_{3}$	—
Value (mm)	4.6	4.6	0.175	0.05	0.125	0.125	—

Ref.	Bandwidth	Thickness	Optical Transmittance	Oblique Incidence
[3]	10–75.5 (153%)	$0.1 λ_{L}$	60%	$30^{\circ}$
[10]	4.3–11.1 (88.3%)	$0.138 λ_{L}$	69.4%	$60^{\circ}$
[11]	8.3–17.4 (70.8%)	$0.107 λ_{L}$	77%	$30^{\circ}$
[12]	3.9–15 (118.1%)	$0.079 λ_{L}$	53%	$30^{\circ}$
[13]	8.0–18 (76.9%)	$0.12 λ_{L}$	80.2%	$30^{\circ}$
This work	2–18 (160%)	$0.095 λ_{L}$	60%	$45^{\circ}$

Abstract

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Optics Letters