Enhanced absorption study of one-way absorber based on magnetophotonic crystal combined with graphene

Han, Wenjuan; Ouyang, Fangzhou; Lei, Yazhou

doi:10.1007/s12596-021-00678-y

Cited by 4 publications

(4 citation statements)

References 20 publications

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“…Jun et al [18][19][20] have made remarkable progress in the field of nonreciprocal radiation by adding magneto-optical materials to PCs, which has excellent application prospects in new thermal emitters. Wang et al [21][22][23] investigated two PCs with different dimensions, which achieved well-performing multi-peak absorption at two different wavelengths. Rongkun et al 24 achieved near-perfect non-reciprocal absorption by the transmission matrix method, combined with magneto-optical materials and surface plasmon resonance.…”

Section: Introductionmentioning

confidence: 99%

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Absorption characteristics of a typical photonic crystal unidirectional absorber under graphene modulation

2022

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.Unidirectional absorbers have potential applications in infrared detection, energy conversion, and solar energy harvesting. In this work, the absorption properties of a typical photonic crystal (PC) unidirectional absorber in the visible- and near-infrared modulated by graphene are systematically investigated. This is achieved by placing a typical non-periodic PC in an air medium. When the electromagnetic wave is incident vertically, double peak absorption is formed at wavelengths of 560 nm as well as 755 nm. The achieved non-reciprocal absorption is attributed by the surface plasmon resonance between the semiconductor and metal defect layers. In this work, the effect of period numbers is discussed to improve absorption performance. Meanwhile, the role of the metal defect layer is explored by the variation of the electric field inside the device. And the unidirectional absorption performance was verified. In addition, the absorption characteristics of the two types of semi-conductor material devices are analyzed. Compared to existing unidirectional devices, this structure has the advantages of small size, high efficiency, wide bandwidth, and easy optoelectronic integration. This structure, based on its own absorption and emission characteristics, can facilitate the development of LIDAR stealth devices, and thus, the advancement of infrared radar steganography.

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Section: Introductionmentioning

confidence: 99%

“…Wang et al 21 – 23 investigated two PCs with different dimensions, which achieved well-performing multi-peak absorption at two different wavelengths. Rongkun et al.…”

Section: Introductionmentioning

confidence: 99%

Absorption characteristics of a typical photonic crystal unidirectional absorber under graphene modulation

2022

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“…In 2019, Luo and Lai proposed a near-perfect omnidirectional absorber by using the impedance matching property of PCs [34]. By utilizing graphene in PC structures, the absorption magnitude of the absorbers can be improved about 50% due to large third-order nonlinearity of graphene as a result of field localization in the graphene layer [35]. Gao et al designed a tunable and multifunctional structure based on 1D AGPC in which a phase-change material, VO 2 , placed as a defect layer in the middle of the PC.…”

Section: Introductionmentioning

confidence: 99%

Tunable Terahertz Perfect Absorber and Polarizer Based on one-Dimensional Anisotropic Graphene Photonic Crystal

2022

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In this article, a new tunable absorber and polarizer using one-dimensional anisotropic graphene photonic crystal (1D AGPC) is proposed for terahertz applications. The optical properties of the 1D AGPC structure is obtained through the transfer matrix method (TMM) calculations. In our design, a single defect layer is introduced in the 1D AGPC structure to increase its absorption. The absorption coefficient is further modified by optimizing the AGPC parameters such as the number of photonic crystal periods, the defect layer thickness, and the chemical potential of graphene. The modified structure can provide perfect absorption with a narrow bandwidth of 0.05 THz. On the other hand, considering the anisotropic optical properties of graphene, polarization dependence of the absorption coefficient is investigated. This feature of the structure can be employed to realize a tunable terahertz polarizer by adjusting incident angle at θ 0 = 80°. In this way, high tunable polarization extinction ratio of 6.1 dB to 11.63 dB with respectively very narrow bandwidth of 0.031 THz to 0.023 THz are obtained. The maximum insertion losses within the tunable frequency range are as low as 0.023 dB and 0.031 dB. Hence, our design may have potential applications in narrow-band optoelectronic devices at the terahertz frequency range.

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“…The research on OTS absorbers has mostly been focused on these two structures. Generally, thin metal or thin lossy material layers are placed on a photonic crystal [29][30][31][32] or are inserted at the interface [15,33,34]. The absorption characteristics of these structures are very sensitive to the thickness of the thin metal or the thin lossy material layer.…”

Section: Introductionmentioning

confidence: 99%

Perfect Optical Absorbers by All-Dielectric Photonic Crystal/Metal Heterostructures Due to Optical Tamm State

Zhang

Zhao

et al. 2021

Nanomaterials

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In this study, we theoretically and experimentally investigated the perfect optical absorptance of a photonic heterostructure composed of a truncated all-dielectric photonic crystal (PC) and a thick metal film in the visible regions. The three simulated structures could achieve narrow-band perfect optical absorption at wavelengths of 500 nm, 600 nm, and 700 nm, respectively. Based on the measured experimental results, the three experimental structures achieved over 90% absorption at wavelengths of 489 nm, 604 nm, and 675 nm, respectively. The experimental results agreed well with the theoretical values. According to electromagnetic field intensity distributions at the absorption wavelengths, the physical mechanism of perfect absorption was derived from the optical Tamm state (OTS). The structure was simple, and the absorption characteristics were not significantly affected by the thickness of the thick metal layer, which creates convenience in the preparation of the structure. In general, the proposed perfect absorbers have exciting prospects in solar energy, optical sensor technology, and other related fields.

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Enhanced absorption study of one-way absorber based on magnetophotonic crystal combined with graphene

Cited by 4 publications

References 20 publications

Absorption characteristics of a typical photonic crystal unidirectional absorber under graphene modulation

Absorption characteristics of a typical photonic crystal unidirectional absorber under graphene modulation

Tunable Terahertz Perfect Absorber and Polarizer Based on one-Dimensional Anisotropic Graphene Photonic Crystal

Perfect Optical Absorbers by All-Dielectric Photonic Crystal/Metal Heterostructures Due to Optical Tamm State

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