Polarization-insensitive, ultra-broadband, and compact metamaterial-inspired optical absorber via wide-angle and highly efficient performances

Mohammad Mehrabi; Hamid Rajabalipanah; Ali Abdolali; Majid Tayarani

doi:10.1364/AO.57.003693

Applied Optics
Vol. 57,
Issue 14,
pp. 3693-3703
(2018)
•https://doi.org/10.1364/AO.57.003693

Polarization-insensitive, ultra-broadband, and compact metamaterial-inspired optical absorber via wide-angle and highly efficient performances

Mohammad Mehrabi, Hamid Rajabalipanah, Ali Abdolali, and Majid Tayarani

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Mohammad Mehrabi, Hamid Rajabalipanah, Ali Abdolali, and Majid Tayarani, "Polarization-insensitive, ultra-broadband, and compact metamaterial-inspired optical absorber via wide-angle and highly efficient performances," Appl. Opt. 57, 3693-3703 (2018)

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Abstract

Because of exhibiting extraordinary features, metamaterial absorbers have captured considerable attention in recent years, especially at visible frequencies. In this paper, a new design of a metamaterial-inspired perfect visible absorber (MIPVA) is investigated, which exhibits ultra-broadband, polarization-independent, and wide-angle performances. The proposed MIPVA provides a flat and near unity absorbance ( $> 99 %$ ) in an ultra-broad range of radiation wavelengths from $λ = 500$ to 625 nm, while retaining its convincing absorptivity over the entire visible wavelengths. A comprehensive parametric study is accomplished to demonstrate the effects of structural parameters on the absorptivity of the designed MIPVA. To clarify the physical mechanism of absorption, the electric field and surface current distributions of MIPVA are also monitored and elaborately discussed throughout the paper. The results show that the proposed MIPVA exhibits a polarization-insensitive absorption behavior in a wide range of incident wave angles. The interference theory is also utilized to verify the results. In addition, our MIPVA has a compact and low-profile design, while its ability to absorb solar radiation is significantly improved with respect to preceding studies in terms of both the frequency bandwidth and absorptivity; thereby, it is a worthy candidate to play an essential role in different visible-range applications.

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$P$	$L$	$a$	$b$
186 nm	40 nm	42 nm	11 nm
$x$	$y$	$w$	$f$
16 nm	10 nm	3 nm	4 nm
$d$	$t$	$h$
30 nm	5 nm	35 nm

Paper	Operating Wavelength (nm)	Cell Dimension	Functionality	Absorptivity (%)	Perfect Absorber	Thickness (nm)
[14]	714–790	$420 nm \times 420 nm$	single band	$> 90 %$	×	155
[52]	453–529	$550 nm \times 550 nm$	single band	$> 70 %$	×	185
[23]	428	$600 nm \times 600 nm$	dual band	99.96%	✓	144.78
[23]	489	$600 nm \times 600 nm$	dual band	99.37%	✓	144.78
[24]	451.9	$520 nm \times 520 nm$	dual band	99.9%	✓	267.33
[24]	551.7	$520 nm \times 520 nm$	dual band	99.9%	✓	267.33
[53]	450	$370 nm \times 370 nm$	dual band	99%	✓	245
[53]	584	$370 nm \times 370 nm$	dual band	$> 96 %$	✓	245
[25]	1044.5, 1111.9	$980 nm \times 980 nm$	multiband	98.9%, 99.39%	×	130
	1407.7, 1666.8			86.46%, 92.8%
	2014.7			97.96%
[26]	455.7–480.8	$400 nm \times 400 nm$	multiband	$> 99 %$	✓	115
[26]	666	$400 nm \times 400 nm$	multiband	$> 99 %$	✓	115
[54]	471.8–557.7	$530 nm \times 530 nm$	wideband	$> 70 %$	×	207
[55]	389.6–674.1	$500 nm \times 500 nm$	wideband	$> 90 %$	×	125
[56]	387–800	$280 nm \times 280 nm$	wideband	$> 76 %$ , $< 90 %$	×	146
[29]	490–847	$520 nm \times 520 nm$	wideband	$> 90 %$	×	56
[31]	500–529.6	$530 nm \times 530 nm$	wideband	$> 99 %$	✓	213.6
Our work	500–625	$186 nm \times 186 nm$	wideband	$> 99 %$	✓	70

$P$	$L$	$a$	$b$
186 nm	40 nm	42 nm	11 nm
$x$	$y$	$w$	$f$
16 nm	10 nm	3 nm	4 nm
$d$	$t$	$h$
30 nm	5 nm	35 nm

Paper	Operating Wavelength (nm)	Cell Dimension	Functionality	Absorptivity (%)	Perfect Absorber	Thickness (nm)
[14]	714–790	$420 nm \times 420 nm$	single band	$> 90 %$	×	155
[52]	453–529	$550 nm \times 550 nm$	single band	$> 70 %$	×	185
[23]	428	$600 nm \times 600 nm$	dual band	99.96%	✓	144.78
[23]	489	$600 nm \times 600 nm$	dual band	99.37%	✓	144.78
[24]	451.9	$520 nm \times 520 nm$	dual band	99.9%	✓	267.33
[24]	551.7	$520 nm \times 520 nm$	dual band	99.9%	✓	267.33
[53]	450	$370 nm \times 370 nm$	dual band	99%	✓	245
[53]	584	$370 nm \times 370 nm$	dual band	$> 96 %$	✓	245
[25]	1044.5, 1111.9	$980 nm \times 980 nm$	multiband	98.9%, 99.39%	×	130
	1407.7, 1666.8			86.46%, 92.8%
	2014.7			97.96%
[26]	455.7–480.8	$400 nm \times 400 nm$	multiband	$> 99 %$	✓	115
[26]	666	$400 nm \times 400 nm$	multiband	$> 99 %$	✓	115
[54]	471.8–557.7	$530 nm \times 530 nm$	wideband	$> 70 %$	×	207
[55]	389.6–674.1	$500 nm \times 500 nm$	wideband	$> 90 %$	×	125
[56]	387–800	$280 nm \times 280 nm$	wideband	$> 76 %$ , $< 90 %$	×	146
[29]	490–847	$520 nm \times 520 nm$	wideband	$> 90 %$	×	56
[31]	500–529.6	$530 nm \times 530 nm$	wideband	$> 99 %$	✓	213.6
Our work	500–625	$186 nm \times 186 nm$	wideband	$> 99 %$	✓	70

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