Polarization-insensitive high-efficiency two-dimensional metal-dielectric grating by nanodisks arrays

Huang, Zhisen; Wang, Bo

doi:10.1088/1402-4896/ac2f7e

Cited by 17 publications

(16 citation statements)

References 43 publications

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“…The structural parameters of the MA are optimized by combining FDTD with simulated annealing (SA) [38,39]. The cost function of SA is:…”

Section: Resultsmentioning

confidence: 99%

Ultra-wideband and wide-angle metamaterial absorber for solar energy harvesting from ultraviolet to near infrared

Luo,

Li,

2023

Phys. Scr.

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In this paper, an ultra-wideband solar absorber consisting of a four-layer structure of Al2O3-TiN-Al2O3-Ti is proposed. The proposed absorber achieves an average absorption of 97.85% in the wavelength range of 250-2000 nm (49.96% improvement over the reference planar structure), and its bandwidth of absorption over 90 % is even as high as 1742 nm. As a result of the symmetrical design of the structure, the absorber has polarization insensitivity and wide-angle absorption characteristics. In particular, the absorber has a large process tolerance in the structural parameters and a high degree of universality for other metals and dielectric materials, which is highly advantageous in manufacturing. In addition, we explored the reasons for the high absorption of the structure in detail, discussed the influence of different structures on the absorption, and analyzed the absorption characteristics and thermal conversion efficiency of the structure under the solar spectrum. The proposed structure provides a broader bandwidth and higher light absorption than the recently reported work and further reduces the structure's thickness. Therefore, the absorber will have broad application prospects in photothermal conversion, solar cells, imaging, and stealth.

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“…The structural parameters of the MA are optimized by combining FDTD with simulated annealing (SA) [38,39]. The cost function of SA is:…”

Section: Resultsmentioning

confidence: 99%

Ultra-wideband and wide-angle metamaterial absorber for solar energy harvesting from ultraviolet to near infrared

Luo,

Li,

2023

Phys. Scr.

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show abstract

“…To make the structure achieve the performance of broadband high-e ciency absorption, its structural parameters are optimized using simulated annealing (SA) [38,39] combined with the FDTD. The cost function of SA is:…”

Section: Resultsmentioning

confidence: 99%

Ultra-broadband and wide-angle thin metamaterial solar absorber based on the square-disk array

Luo,

Liu,

Zhao

et al. 2023

Preprint

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In this paper, an ultra-wideband solar absorber consisting of a four-layer structure of Al2O3-TiN-Al2O3-Ti is proposed. The proposed absorber achieves an average absorption of 97.85% in the wavelength range of 250–2000 nm (49.96% improvement over the reference planar structure), and its bandwidth of absorption over 90% is even as high as 1742 nm. As a result of the symmetrical design of the structure, the absorber has a polarization insensitivity as well as a wide-angle absorption characteristic. In particular, the absorber has a large process tolerance in the structural parameters and a high degree of universality for other metals and dielectric materials, which is highly advantageous in manufacturing. In addition, we explored the reasons for the high absorption of the structure in detail, discussed the influence of different structures on the absorption, and analyzed the absorption characteristics of the structure under the solar spectrum. The proposed structure provides a broader bandwidth and higher light absorption than the recently reported work and further reduces the structure's thickness. Therefore, the absorber will have broad application prospects in photothermal conversion, solar cells, imaging, and stealth.

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“…The above work demonstrated that wide bandwidth can be obtained with two-layer gratings compared to single-layer gratings. Huang et al described a 2D reflective grating with nanodisks arrays, which can achieve high efficiency and polarization-insensitive output of (−1, 0) order [27]. Although high efficiency can be obtained in high-density gratings and 2D gratings with polarizationdependent or polarization-independent properties, there are still few reports of designing bidirectional gratings to achieve dual-functional outputs with polarization-dependent and polarization-independent properties.…”

Section: Introductionmentioning

confidence: 99%

Double-sided structure grating for dual-functional polarizing or non-polarizing splitter

Huang,

Wang

2024

Phys. Scr.

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In this paper, a novel bidirectional dual-functional metal-dielectric reflective grating with a double-sided structure is described, which can achieve transverse-electric (TE) polarization in the -1st order and transverse-magnetic (TM) polarization in the 0th order as a polarizing beam splitter in the upper part of the grating or TE and TM polarizations in the -1st order with polarization-independent property in the lower part of the grating. The proposed grating works at wavelength 1550 nm under Littrow mounting. Rigorous coupled-wave analysis (RCWA) is used to optimize grating parameters. The upper part can achieve diffraction efficiencies of 99.53% and 99.11% for TE polarization in the -1st order and TM polarization in the 0th order, respectively. In addition, the extinction ratios of -1st order and 0th order are 58.87 dB and 52.02 dB, respectively. The lower part can achieve diffraction efficiencies of 99.41% and 99.26% for TE and TM polarizations in the -1st order, respectively. Furthermore, wide incident wavelength and angular bandwidths can be obtained in both the upper and lower parts. Such a high-efficiency dual-functional grating has a wide range of applications in optical systems.

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Polarization-insensitive high-efficiency two-dimensional metal-dielectric grating by nanodisks arrays

Cited by 17 publications

References 43 publications

Ultra-wideband and wide-angle metamaterial absorber for solar energy harvesting from ultraviolet to near infrared

Ultra-wideband and wide-angle metamaterial absorber for solar energy harvesting from ultraviolet to near infrared

Ultra-broadband and wide-angle thin metamaterial solar absorber based on the square-disk array

Double-sided structure grating for dual-functional polarizing or non-polarizing splitter

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