Dual-band perfect graphene absorber with an all-dielectric zero-contrast grating-based resonant cavity

Hu, Jinhua; Liang, Junfang; Zou, Jun; Shi, Chaoying; Zhao, Jijun

doi:10.1016/j.optcom.2022.128908

Cited by 7 publications

(2 citation statements)

References 38 publications

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“…According to Figure 4a, the central resonant wavelength exhibits a red-shifts as d h varies from 335 to 375 nm. The absorption efficiency of the proposed dual-layer asymmetric meta-grating structure is high, which differs from our previous work [29]. Figure 4b shows the absorption spectra of the designed structure when the period P increases from 666 to 726 nm.…”

Section: Resultscontrasting

confidence: 66%

“…With the proposal of various types of graphene absorbers such as multi-band absorbers [29][30][31], broadband absorbers [32], and polarization-insensitive wide-angle metamaterial absorbers [33], the dynamic control of graphene absorbers has become an important issue. For instance, Wu et al investigated the tunable near-infrared perfect absorption of graphene with bandwidth ranging from 5.7 to 187.1 nm in the compound grating waveguide structure supporting the quasi-BICs [34].…”

Section: Introductionmentioning

confidence: 99%

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Near-Perfect Narrow-Band Tunable Graphene Absorber with a Dual-Layer Asymmetric Meta-Grating

Liang

Liu

et al. 2022

Photonics

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A near-perfect narrow-band graphene-based absorber was fabricated using a resonant system integrated with an asymmetric meta-grating at a wavelength of 1550 nm. By optimizing the gap between the two grating strips, the absorption of monolayer graphene can be increased to 99.6% owing to the strong field confinement of the bottom zero-contrast grating (ZCG). The position of the absorption spectrum could be adjusted by tailoring the grating period or the thickness of the waveguide layer. Interestingly, absorption spectrum linewidth can be tailored by changing the thickness of the spacer layer. The accidental bound states in the continuum (BICs) are then demonstrated in the structure. Moreover, the designed structure realizes the dynamic adjustment of the absorption efficiency at a specific wavelength, which has excellent potential in integrated optical devices and systems.

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Section: Resultscontrasting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

Near-Perfect Narrow-Band Tunable Graphene Absorber with a Dual-Layer Asymmetric Meta-Grating

Liang

Liu

et al. 2022

Photonics

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Dielectric‐Based Metamaterials for Near‐Perfect Light Absorption

Wang,

Qin,

Duan

et al. 2024

Adv Funct Materials

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The emergence of metamaterials and their continued prosperity have built a powerful working platform for accurately manipulating the behavior of electromagnetic waves, providing sufficient possibility for the realization of metamaterial absorbers with outstanding performance. However, metamaterial absorbers composed of metallic materials typically possess many unfavorable factors, such as non‐adjustable absorption, easy oxidation, low‐melting, and expensive preparation costs. The selection of dielectric materials provides excellent alternatives due to their remarkable properties, thus dielectric‐based metamaterial absorbers (DBMAs) have attracted much attention. To promote breakthroughs in DBMAs and guide their future development, this work systematically and deeply reviews the recent research progress of DBMAs from four different but progressive aspects, including physical principles; classifications, material selections and tunable properties; preparation technologies; and functional applications. Five different types of theories and related physical mechanisms, such as Mie resonance, guided‐mode resonance, and Anapole resonance, are briefly outlined to explain DBMAs having near‐perfect absorption performance. Mainstream material selections, structure designs, and different types of tunable DBMAs are highlighted. Several widely utilized preparation methods for customizing DBMAs are given. Various practical applications of DBMAs in sensing, stealth technology, solar energy absorption, and electromagnetic interference suppression are reviewed. Finally, some key challenges and feasible solutions for DBMAs’ future development are provided.

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Polarization-independent nonreciprocal thermal radiation by cylindrical grating structure

Zou,

Wang,

2024

International Journal of Heat and Mass Transfer

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Dual-band perfect graphene absorber with an all-dielectric zero-contrast grating-based resonant cavity

Cited by 7 publications

References 38 publications

Near-Perfect Narrow-Band Tunable Graphene Absorber with a Dual-Layer Asymmetric Meta-Grating

Near-Perfect Narrow-Band Tunable Graphene Absorber with a Dual-Layer Asymmetric Meta-Grating

Dielectric‐Based Metamaterials for Near‐Perfect Light Absorption

Polarization-independent nonreciprocal thermal radiation by cylindrical grating structure

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