Ultra-broadband, polarization-independent, wide-angle absorption in impedance-matched metamaterials with anti-reflective moth-eye surfaces

Contractor, Rushin; D’Aguanno, Giuseppe; Menyuk, Curtis R.

doi:10.1364/oe.26.024031

Cited by 29 publications

(20 citation statements)

References 38 publications

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“…The dielectric layer between the metal film and the resonator plate assists the structure in creating coupling capacitance 27 , 28 . The reflection of the incident wave is at a minimum if the metasurface impedance and the open space impedance are adequately matched 29 .…”

Section: Introductionmentioning

confidence: 99%

Polarization and angular insensitive bendable metamaterial absorber for UV to NIR range

Shuvo

Hossain

Mahmud

et al. 2022

Sci Rep

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Broadband absorbers are required for solar energy harvesting because they efficiently absorb the incident photon in the wide-ranging solar spectrum. To ensure high absorption of photons, metamaterial absorbers (MMAs) have been a growing area of interest in recent years. In this article, an MMA is proposed using a metal–insulator–metal (MIM) structure (Ni–SiO2–Ni) that shows a near-unity broadband absorption of wavelengths from 300 to 1600 nm, with a 95.77% average absorption and a peak absorption of 99.999% at 772.82 nm. The MMA is polarization insensitive as well as wide incident angle stable. Analysis of the effects of mechanical bending on the absorption of the proposed structure shows that absorption holds satisfactory values at different degrees of mechanical loading. The suggested MMA unit cell structure was computationally simulated using the Finite Integration Technique (FIT) and verified using the Finite Element Method (FEM). To analyze the feasibility of the proposed MMA as a solar cell, it is investigated with the universal AM 1.5 solar spectrum characteristics. Besides solar energy harvesting, the proposed MMA unit cell may be employed in a variety of diverse optical applications, including sensors, detectors, and imaging.

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Section: Introductionmentioning

confidence: 99%

Polarization and angular insensitive bendable metamaterial absorber for UV to NIR range

Shuvo

Hossain

Mahmud

et al. 2022

Sci Rep

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“…Metal layers prevent the propagation of the EM waves, and a coupling capacitance is constructed between the backlayer and the resonator in an MA with the help of a dielectric substance [17], [18]. Plasmonic resonance characteristics of a dielectric substrate [19], [20], perfect impedance match [21], [22], symmetric structure of the resonator [23], [24], and a good E-field, H-field and surface charge distribution [25], [26] causes high absorption of an PMA. Most common MA absorber structures are three-layered structures [27], [28], but there are also two-layered [29], four-layered [30], [31], multi-layered stacks [32]- [35].…”

Section: Introductionmentioning

confidence: 99%

A Multi-Band Near Perfect Polarization and Angular Insensitive Metamaterial Absorber With a Simple Octagonal Resonator for Visible Wavelength

et al. 2021

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A multi-band, ultrathin, polarization-insensitive, near-perfect metamaterial absorber (PMA) has been proposed and substantiated numerically for solar thermophotovoltaic (STPV) systems which also can be used in some other applications. This kind of absorber currently drawing massive interest throughout the research of optics. Especially in solar harvesting metamaterial absorbers can give a huge boost in efficiency by intensifying the solar electromagnetic wave. Visible wavelength has been the key focus of the proposed design so that the structure can utilize solar energy proficiently. Aluminum (Al) and Gallium Arsenide (GaAs) have been chosen as materials for their higher electron mobility along with good temperature stability. The PMA is a three-layer metal-dielectric-metal called sandwiched structure. For proper characterization of the PMA absorber, extensive parametric inspections were carried out with underlying physics. The finite integration technique (FIT) in computer simulation technology microwave studio (CST MWS) is used to perform the numerical analysis and for verification finite element method (FEM) in COMSOL Multiphysics has been used along with interference theory model (ITM) for calculating the absorbance. The PMA shows 99.27%, 99.89%, 99.91%, and 99.06% perfect absorption at 454.75nm, 505.53nm, 568.72nm, and 600.85nm resonance wavelength in all three modes of waveguide propagation. The design also exhibits incident wave stability up to 60 • for both transverse electric (TE), and transverse magnetic (TM) wave modes. Excellent glucose concentration sensing ability was also observed with the proposed structure. So, the proposed PMA can be implemented in solar energy harvesting devices along with solar sensors or detectors, light trappers, light modulators, or light wavelength detectors.

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“…However, these may not be the only reasons for a nearperfect MMA. Perfect impedance match of the metal with the free space of the solar spectrum [37], [38], the plasmonic resonance characteristics of the dielectric layer [39], [40], a symmetrical structure resonator with good confinement of the EM wave [41], [42], and a good E-field, H-field and distributed surface charge are also reasons for high absorption [43], [44]. MMA may also consist of two-layer [45], fourlayer [46], [47], multilayer stacks [48]- [50] along with most common three-layer structure.…”

Section: Introductionmentioning

confidence: 99%

A Wide Incident Angle, Ultrathin, Polarization-Insensitive Metamaterial Absorber for Optical Wavelength Applications

et al. 2020

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Polarization-insensitive metamaterial absorbers (MMAs) are currently attracting a great deal of interest throughout the optical region. These kinds of MMAs can be used as energy harvesting, thermal imaging, plasmonic sensor, magnetic imaging, light trapping, optical modulator, and can help to decipher an inherence for the field. Here, a polarization-insensitive ultrathin MMA has been proposed with an extensive incident angular stability for the optical region with a sandwiched three-layer structure. Tungsten (W) and silicon dioxide (SiO2) have been chosen as materials for their various advantages in the optical spectrum with higher temperature stability. The design simulated with the finite integration technique (FIT), and validation of the simulated data is assured with the interference theory model (ITM). Underlying physics of the absorption characteristics and performance of the structure are immensely explained. The design acquired an average absorption of 96.7% from 380nm to 700nm and 96.61% for both transverse electric (TE) and transverse magnetic (TM) polarization. It has a peak absorption of 99.99% at 498.25nm, and over 99% from 460nm to 540nm, due to a very good impedance match with plasmonic resonance characteristics. For both TE and TM mode, it has wide angular independence up to 60⁰, which can be used for solar cell and solar thermo-photovoltaics (STPV). The various parametric sweep also analyzed for acquiring the geometric shape with a wide bandwidth to find resonance wavelength. As the MMA shifts its resonance wavelength with the change of its dielectric thickness, it can be used as an optical sensor. Changing dielectric in a Pyrex will enable the structure to be used as a light detector. Such outstanding absorption properties render the proposed MMA a successful candidate for the optical wavelength applications mentioned above. INDEX TERMS polarization-insensitive, metamaterial absorber, incident angular stability, impedance match, plasmonic resonance characteristics.

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Ultra-broadband, polarization-independent, wide-angle absorption in impedance-matched metamaterials with anti-reflective moth-eye surfaces

Cited by 29 publications

References 38 publications

Polarization and angular insensitive bendable metamaterial absorber for UV to NIR range

Polarization and angular insensitive bendable metamaterial absorber for UV to NIR range

A Multi-Band Near Perfect Polarization and Angular Insensitive Metamaterial Absorber With a Simple Octagonal Resonator for Visible Wavelength

A Wide Incident Angle, Ultrathin, Polarization-Insensitive Metamaterial Absorber for Optical Wavelength Applications

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