A four-band and polarization-independent BDS-based tunable absorber with high refractive index sensitivity

Wu, Xianglong; Zheng, Ying; Luo, Yao; Zhang, Jianguo; Yi, Zao; Wu, Xianwen; Cheng, Shubo; Yang, Wen-Xing; Yu, Yang; Wu, Pinghui

doi:10.1039/d1cp04568g

Cited by 196 publications

(62 citation statements)

References 72 publications

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“…The array periods of the Au nanospheres are p x and p y along the x-axis and the y-axis directions, respectively. Each Au nanosphere is able to support the excitation of the localized surface plasmon polariton resonance [52][53][54][55][56]. The SiO 2 substrate and the SiO 2 cover layer have a constant refractive index of 1.45.…”

Section: Methodsmentioning

confidence: 99%

The Light Absorption Enhancement in Graphene Monolayer Resulting from the Diffraction Coupling of Surface Plasmon Polariton Resonance

Liu

Yan

et al. 2022

Nanomaterials

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In this study, we investigate a physical mechanism to improve the light absorption efficiency of graphene monolayer from the universal value of 2.3% to about 30% in the visible and near-infrared wavelength range. The physical mechanism is based on the diffraction coupling of surface plasmon polariton resonances in the periodic array of metal nanoparticles. Through the physical mechanism, the electric fields on the surface of graphene monolayer are considerably enhanced. Therefore, the light absorption efficiency of graphene monolayer is greatly improved. To further confirm the physical mechanism, we use an interaction model of double oscillators to explain the positions of the absorption peaks for different array periods. Furthermore, we discuss in detail the emerging conditions of the diffraction coupling of surface plasmon polariton resonances. The results will be beneficial for the design of graphene-based photoelectric devices.

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Section: Methodsmentioning

confidence: 99%

The Light Absorption Enhancement in Graphene Monolayer Resulting from the Diffraction Coupling of Surface Plasmon Polariton Resonance

Liu

Yan

et al. 2022

Nanomaterials

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“…For an ideal absorber must have a high efficiency of light absorption and many other physical properties, such as polarization stability and adjustability etc. (Jiang et al, 2021a;Li et al, 2021b;Li R. et al, 2021c;Li-Ying et al, 2021;Wu et al, 2021). However, the existing absorbers are generally limited by low temperature tolerance, low light absorption efficiency and materials (Briggs et al, 2010;Li et al, 2020a;Chen et al, 2021a;Chen et al, 2021b;Jiang et al, 2021b).…”

Section: Introductionmentioning

confidence: 99%

Design and Photoelectric Performance of Perfect Solar Absorber Based on GaAs Grating

Liu

et al. 2022

Front. Mater.

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In recent years, solar energy has received extensive attention as a clean and renewable energy. We present a perfect broadband solar absorber based on tungsten and semiconductor GaAs in this paper. The structure of GaAs grating-GaAs film-W substrate has been proposed. And the finite time domain difference method (FDTD) has been used for the numerical simulation of the model. Broadband absorption has been realized in the 500–1,850 nm, by adjusting the parameters of geometry to excite high-efficiency surface plasmon resonance. The absorption spectrum of the structure can be changed by adjusting the geometric parameters to meet different needs. The proposed absorber has incidence insensitive (0–60°) and high short-circuit current characteristics. The structure is simple and easy to manufacture, and has superior photoelectric properties to be application in photothermal conversion, collection and utilization of solar energy.

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“…Hollow plasmonic nanoresonators, such as circular waveguides, periodic patterns of spherical rings and apertures, allow for multiple bands engineering with controlled polarization sensitivity that is advantageous also in emission enhancement [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Plasmonically Enhanced Superradiance of Broken-Symmetry Diamond Color Center Arrays Inside Core-Shell Nanoresonators

et al. 2022

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Superradiance was demonstrated in broken-symmetry arrays of SiV diamond color centers embedded into concave plasmonic nanoresonators. The coupled configurations, including the diamond-silver (bare) and diamond-silver-diamond (coated) nanoresonators’ geometry parameters as well as the emitters’ azimuthal orientation and distance from the metal, were numerically optimized. An objective function consisting of the total fluorescence enhancement multiplied by the corrected emission quantum efficiency was used to design nanoresonators that promote superradiance. A larger total fluorescence enhancement was achieved via a larger number of emitters in both geometries, in coated spherical and in bare ellipsoidal nanoresonators. The superradiance performance was better in the case of a smaller number of emitters in bare spherical and coated ellipsoidal nanoresonators and in the case of a larger number of emitters in coated spherical and bare ellipsoidal nanoresonators. Ellipsoidal geometry is advantageous independent of composition and seeding. The configurations optimal for non-cooperative fluorescence enhancement and superradiance are coincidental. A radiative rate enhancement proportional to the number of emitters was found in wide spectral regions; therefore, superradiance implies N-fold enhancements coexist at excitation and emission. In ellipsoidal nanoresonators, the better superradiance achieved via a smaller quality-factor is accompanied by larger frequency pulling.

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A four-band and polarization-independent BDS-based tunable absorber with high refractive index sensitivity

Abstract: We proposed a four-band terahertz tunable narrow-band perfect absorber based on bulk Dirac semi-metallic (BDS) metamaterials with microstructure. The resonance frequency of the absorber can be adjusted by adjusting the Fermi level of BDS.

Cited by 196 publications

References 72 publications

The Light Absorption Enhancement in Graphene Monolayer Resulting from the Diffraction Coupling of Surface Plasmon Polariton Resonance

The Light Absorption Enhancement in Graphene Monolayer Resulting from the Diffraction Coupling of Surface Plasmon Polariton Resonance

Design and Photoelectric Performance of Perfect Solar Absorber Based on GaAs Grating

Plasmonically Enhanced Superradiance of Broken-Symmetry Diamond Color Center Arrays Inside Core-Shell Nanoresonators

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