Recent advances on perfect light absorbers and their promise for high-performance opto-electronic devices [Invited]

Zong, Shu; Zeng, Dongwen; Wen, Yumei; Liu, Guiqiang; Liu, Zhengqi

doi:10.3788/col202220.073603

Cited by 8 publications

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“…The control of the electromagnetic structure is accomplished by altering the unit structure, cycle, length, material, and other characteristics. Metamaterial absorbers have drawn a lot of attentions due to the novel optical properties, such as reflection, absorption, scattering and so on [8], [9]. A typical structure like the shape of sandwich is widely designed in the metamaterial absorber due to the generation of F-P cavity resonance.…”

Section: Introductionmentioning

confidence: 99%

Switchable Wideband Terahertz Absorber Based on Refractory and Vanadium Dioxide Metamaterials

et al. 2023

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Achieving actively tunable metamaterial absorption is a significant development direction. Phase-transition materials have attracted growing interest for the use in nanophotonics owing to their flexibility. In this work, we firstly demonstrate a wideband terahertz refractory absorber that achieves more than 90% absorptance in the range of 1.71-3.31 THz. The metal composing the structure is refractory metal, which could function in high-temperature conditions and complex electromagnetic environment. Then, we incorporate phase-change material vanadium dioxide (VO 2 ) film to this refractory absorber, realizing high reflection of more than 93% in the metallic state, while the wideband perfect absorption peak over 98% is obtained in the insulating state. Calculated results show that metamaterial absorber obtains switchable functions. Furthermore, the tunable absorber has polarization-insensitive behavior. So, our designed absorber with dynamic tunable characteristics provides flexibility to adjust the absorption performance and has significant value in application. The proposed architecture offers a novel method for creating dynamic and multi-functional photonic devices in phase-change materials.

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Section: Introductionmentioning

confidence: 99%

Switchable Wideband Terahertz Absorber Based on Refractory and Vanadium Dioxide Metamaterials

et al. 2023

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“…Since the first proposal is used to achieve perfect absorption by plasmonic structure in 2008, [1] more and more attention is drawn to the absorbers because they can apply in fields of solar cells, sensors, bolometers, and imaging equipment. [2][3][4] With developments of meta-surface materials, [5] various manners are used for controllation and tunable light absorptions in dual-band, multiband, wideband, and narrow-band. People are devoted to the applications in accurate operations in quick-response sensors [6][7][8][9] in single narrow absorption bands, precise infrared detectors, and high absorptivity solar cells in the atmosphere [10][11][12][13][14][15][16][17][18][19] in the ultrabroad band.…”

Section: Introductionmentioning

confidence: 99%

Infrared Absorber Leveling in Ultra‐Wideband by Using Hybrid Plasmonic Structure

Xu,

Liang,

Qin

et al. 2023

Annalen der Physik

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In this paper, an effective ultra‐broadband absorber in long‐wavelength infrared is achieved by a metal‐insulator‐metasurface (MIM) stacked structure. This absorber exhibits an average absorption of 90% at wavelengths ranging from 8 to 14 µm and a maximum absorption rate of up to 97.1%. It is found that the performance is achieved by three mode combinations. The ultra‐broadband leveling absorber is to be polarization‐independent due to its geometrical symmetry. The absorption property can be controlled by the parameters of the triangle unit. It has great potential in many applications such as infrared detection and imaging.

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Actively Tunable THz Absorber for Switchable Operations Between Different Absorption Behaviors

et al. 2022

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Many previous VO 2 -based perfect metamaterial absorbers can enhance light-matter interaction when VO 2 is in metal phase but with weak light-matter interaction when VO 2 is in insulator phase. In this work, an actively tunable terahertz (THz) absorber with the ability to switch between dual-band absorption and single ultra-narrowband absorption is theoretically proposed and numerically demonstrated. The electric dipole resonance, localized surface plasmon resonance, Fabry-Perot resonance and surface lattice resonance are utilized to enhance light-matter interaction. The simulation results show that an absorption peak has an absorptance of 98.6% and the Q-factor reaches 351.5 when vanadium dioxide (VO 2 ) is in the insulating phase. Then, two absorption peaks with the absorptance of 96.2% and 99.5% are presented at 2.30 THz and 3.31 THz, respectively, when VO 2 is in the metallic phase. To better understand the physical mechanisms of this absorber, the influence of parameters is further investigated. The proposed absorber with the dynamically tunable characteristic between such distinct states can pave numerous promising applications in sensing, imaging, active switch and modulator.

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Recent advances on perfect light absorbers and their promise for high-performance opto-electronic devices [Invited]

Cited by 8 publications

References 0 publications

Switchable Wideband Terahertz Absorber Based on Refractory and Vanadium Dioxide Metamaterials

Switchable Wideband Terahertz Absorber Based on Refractory and Vanadium Dioxide Metamaterials

Infrared Absorber Leveling in Ultra‐Wideband by Using Hybrid Plasmonic Structure

Actively Tunable THz Absorber for Switchable Operations Between Different Absorption Behaviors

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