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- W3127435244 abstract "Metamaterial (MM) perfect absorbers are realised over various spectra from visible to microwave. Recently, different approaches have been explored to integrate tunability into MM absorbers. Particularly, tuning has been illustrated through electrical-, thermal-, and photo-induced changes to the permittivity of the active medium within MM absorbers. However, the intricate design, expensive nanofabrication process, and the volatile nature of the active medium limit the widespread applications of MM absorbers. Metal-dielectric stack layered hyperbolic metamaterials (HMMs) have recently attracted much attention due to their extraordinary optical properties and rather simple design. Herein, we experimentally realised a reconfigurable HMM perfect absorber based on alternating gold (Au) and Ge2Sb2Te5 (GST225) layers for the near-infrared (N-IR) region. It shows that a red-shift of 500 nm of the absorptance peak can be obtained by changing the GST225 state from amorphous to crystalline. The nearly perfect absorptance is omnidirectional and polarisation-independent. Additionally, the absorptance peak can be reversibly switched in just five nanoseconds by re-amorphising the GST225, enabling a dynamically reconfigurable HMM absorber. Experimental data are validated numerically using the finite-difference time-domain method. The absorber fabricated using our strategy has advantages of being reconfigurable, uncomplicated, and lithography-free over conventional MM absorbers, which may open up a new path for applications in energy harvesting, photodetectors, biochemical sensing, and thermal camouflage techniques." @default.
- W3127435244 created "2021-02-15" @default.
- W3127435244 creator A5031781888 @default.
- W3127435244 creator A5063333932 @default.
- W3127435244 creator A5074522250 @default.
- W3127435244 creator A5084822166 @default.
- W3127435244 date "2021-01-01" @default.
- W3127435244 modified "2023-10-17" @default.
- W3127435244 title "A reconfigurable hyperbolic metamaterial perfect absorber" @default.
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- W3127435244 doi "https://doi.org/10.1039/d0na00787k" @default.
- W3127435244 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36132556" @default.
- W3127435244 hasPublicationYear "2021" @default.