Broadband bidirectional visible light absorber with wide angular tolerance

Zhou, Lei; Zhou, Yun; Zhu, Yanji; Dong, Xiaoxuan; Gao, Bin; Wang, Yanzong; Shen, Shanpu

doi:10.1039/c5tc03168k

Cited by 38 publications

(20 citation statements)

References 46 publications

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“…al. [22] proposed a visible light absorber based on a quasi-periodic gold nanocone array, achieving an average front absorption of 87.4% and a corresponding rear absorptivity of 76.2% in the range 300-700 nm. Cui et al presented a near-perfect absorber at visible frequency based on homogenous meta-surface nickel with a two-dimension cylinder array, which achieves average absorption at normal incidence are beyond 94% and 92% over the entire visible wavelength band from 400 nm to 700 nm, respectively [23].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of an Efficient Broadband Metamaterial Absorber in Visible Light Region

Tuan

Quynh

2019

IEEE Photonics J.

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We report a numerical study of a broadband metamaterial absorber in visible light region by utilizing a single layer of metal-dielectric-metal configuration. The absorption bandwidth and absorption performances are tailored by varying the resonator shapes and metal materials. The absorption bandwidth of the proposed metamaterial absorber (MA) structure is enhanced significantly with decreasing the order of rotational symmetry of the resonator shape. Using gold configuration, the twofold symmetry MA structure based on the double-sized axe shaped resonator exhibits the broadband absorption response over the entire visible light and apart of infrared spectrum range from 320 to 982 nm with absorptivity above 90% for both transverse electric and transverse magnetic polarizations. The physical mechanism of broadband absorption is explained by the current, electric, and magnetic distributions, significantly affected by the propagating surface and localized surface plasmon resonances. Furthermore, the high absorber performances of the twofold symmetry MA structure can be obtained over entire visible light region (400-700 nm) for both noble metal of gold and low-cost metal of nickel configurations, indicating the proposed absorber is a promising candidate for low-cost and large-scale fabricate device operated in visible light region.

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Section: Introductionmentioning

confidence: 99%

Numerical Study of an Efficient Broadband Metamaterial Absorber in Visible Light Region

Tuan

Quynh

2019

IEEE Photonics J.

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“…Finally, the calculated results show that total photothermal conversion efficiency for the metamaterial solar absorber can reach 91.53%, which is very close to the photothermal conversion efficiency (95.6%) of the ideal cut‐off solar absorber. The result shows greatly improvement of photothermal conversion efficiency compare to previously reported solar absorbers …”

Section: Introductionmentioning

confidence: 57%

“…With the increase of the incident angle, the absorption efficiency decrease slightly at the wavelength beyond 1000 nm, whereas the absorption efficiency is enhanced at the UV region with increasing the incident angle. Note that, even with a 60 degrees angle of incidence, the solar absorber can still maintain a high absorption above 94% at the range of 270–1240 nm and a low absorption below 20% at the wavelength beyond 2050 nm, which shows an excellent absorption performance better than most of previously reported solar absorbers at the normal incidence . As shown in Figure b, the absorption spectra with different incident angles at TE polarization are calculated and depicted.…”

Section: Resultsmentioning

confidence: 82%

“…For example, Li proposed and demonstrated a broadband absorber based on a symmetrical nanostructure consisting of tri‐layer Cr/SiO 2 /Cr uniform films on Si substrate, which realize a near‐perfect absorption with polarization‐independence from 450 to 800 nm . However, the high absorption can only be realized in visible range, causing a low overall efficiency in the entire solar spectrum, and the same problem also can be found in many reported solar absorbers . Liang proposed and numerically investigated a metamaterial‐based nanopyramid array with 17 metal/dielectric pairs, which shows an absorption exceeding 90% in the range of 200–2900 nm .…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study of the Wide‐angle Polarization‐Independent Ultra‐Broadband Efficient Selective Solar Absorber in the Entire Solar Spectrum

Liu

et al. 2017

Solar RRL

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Increasing the absorption efficiency of solar radiation has great significance for the renewable energy applications, such as residential water heating, seawater desalination, wastewater treatment and solar thermophotovoltaic devices. Optical absorbers based on metamaterials have been widely investigated using a variety of structural designs. However, the near‐ideal solar thermal absorber has not yet been demonstrated, which has a near unity absorption from the ultraviolet to the near‐infrared region and meanwhile an absorption close to zero in the mid‐infrared region. Here, using FEM and FDTD methods respectively, we propose and numerically demonstrate an ultra‐broadband selective solar absorber with an extremely high absorption efficiency above 99% within the range of 435–1520 nm. And meanwhile the emissivity of the nanostructure is below 20% in mid‐infrared region. The total photothermal conversion efficiency of the proposed solar absorber can reach 91.53%, which is very close to the photothermal conversion efficiency (95.6%) of the ideal cut‐off absorber. The physical mechanisms of the nearly perfect absorption are also investigated and analyzed clearly, which is attributed to the hybridization of localized surface plasmon resonance, gap plasmon resonance, and propagating surface plasmon resonance. Particularly, the near‐ideal efficient selective absorption can still be maintained very well at a wide incident angle regardless of the incident light polarization. Owing to the characteristics such as polarization and angle independence, broadband operation, near‐perfect absorption and strong spectral selectivity, the solar absorbers are promising candidates for solar energy harvesting, stealth technology, and thermo‐photovoltaic energy conversion.

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“…Materials with good light-to-heat conversion have relied on metal-based micro or nanostructures [23][24][25][26][27]28] and nanoparticles. [29][30][31]32] These structures mainly employed a strategy of light absorption based on the plasmonic strong near-field formation at the interface of the metallic nanostructures and the dielectric substrate.…”

Section: Introductionmentioning

confidence: 99%

Omnidirectional, Broadband Light Absorption in a Hierarchical Nanoturf Membrane for an Advanced Solar‐Vapor Generator

Kim

Kang

Lee

et al. 2020

Adv Funct Materials

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Solar‐thermal materials have been intensively studied in the context of production and localization of thermal energy, targeting an industry level application. Although photonic and optical strategies for enhancing light absorption have increased the efficiency of photo excitation/conversion into thermal energy, most of them have several limitations such as large area fabrication, thermal stability and broadband/omnidirectional light absorption. In this study, a gold‐coated hierarchical nanoturf membrane (Au/h‐Nanoturf membrane) incorporated with randomly distributed high aspect ratio (AR) nanostructures and micro‐through holes is proposed. The Au/h‐Nanoturf has peculiar black structures that provide advantages in forming a membrane with a large area and in absorbing broadband solar light spectrum. Furthermore, the membrane is combined with micro‐cone array which makes it exhibit exceptionally omnidirectional light absorption properties. Using computational analysis, it is confirmed that the micro‐cone array substantially contributes to the omnidirectional solar absorption irrespective of the wavelength. The optimized structural parameters for the maximum efficiency of the solar‐thermal materials are also found. The prepared solar‐vapor generator with the optimized structural features exhibits 91% average conversion efficiency under one sun condition. The efficiency is sustainable for up to four weeks. The highly efficient and omnidirectional broadband‐absorbing solar‐thermal membrane can be readily employed, targeting an industry level application.

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Broadband bidirectional visible light absorber with wide angular tolerance

Abstract: A wide-band bidirectional visible light absorber has been developed based on a quasi-periodic nanocone array coated with a dielectric-loaded Au monolayer.

Cited by 38 publications

References 46 publications

Numerical Study of an Efficient Broadband Metamaterial Absorber in Visible Light Region

Numerical Study of an Efficient Broadband Metamaterial Absorber in Visible Light Region

Numerical Study of the Wide‐angle Polarization‐Independent Ultra‐Broadband Efficient Selective Solar Absorber in the Entire Solar Spectrum

Omnidirectional, Broadband Light Absorption in a Hierarchical Nanoturf Membrane for an Advanced Solar‐Vapor Generator

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