Wideband close perfect meta surface absorber for solar photovoltaic and optical spectrum applications

Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: 45, P. 103849 - 103849

Published: Jan. 4, 2024

Language: Английский

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Broadband near unity absorption meta-structure for solar thermophotovoltaic systems and optical window applications

Nanoscale, Journal Year: 2023, Volume and Issue: 15(31), P. 12972 - 12994

Published: Jan. 1, 2023

Developing a meta-structure with near-unity absorbance in the visible and infrared spectra for solar energy harvesting, photodetection, thermal imaging, photo-trapping, optical communications is long-term research challenge. This presents four-layered (insulator-metal-insulator-metal) unit cell that showed peak of 99.99% at 288-300 nm average 99.18% over 250-2000 wavelength range TE TM modes, respectively. The symmetric pattern resonator layer shows polarization insensitivity an absorption both modes. Furthermore, proposed design wide incident angle stability up to ≤60 degrees structure also exhibits negative index properties 1000-2000 nm, generate anti-parallel surface current flow ground layers, which induces magnetic electric field resonance increases absorption. performance further validated by interference theory model zero value conversion ratio (PCR). E, H, distribution are analyzed explain mechanism cell. It highest photo-thermal efficiency 99.11%, demonstrating viability as absorber. promises potentially valuable applications such because its decent performance.

Language: Английский

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Polarization controllable multi-window electromagnetic induced transparency-like in a graphene metamaterial

Photonics and Nanostructures - Fundamentals and Applications, Journal Year: 2025, Volume and Issue: unknown, P. 101370 - 101370

Published: Feb. 1, 2025

Language: Английский

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Synergistic self-assembly of MXene monolayer dispersions doped with NiFe2O4 nanoparticles for high-performance microwave absorbers

Journal of Materials Science, Journal Year: 2025, Volume and Issue: unknown

Published: April 14, 2025

Language: Английский

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Broadband plasmon-induced transparency to an anapole mode induced absorption conversion Janus metastructure by a waveguide structure in the terahertz region

Physical Chemistry Chemical Physics, Journal Year: 2023, Volume and Issue: 25(29), P. 19666 - 19683

Published: Jan. 1, 2023

A Janus metastructure (MS) assisted by a waveguide structure (WGS) resting on anapole modes and exhibiting direction-dependent behavior has been developed in the terahertz (THz) region. Ultra-broadband absorption is formed destructive interference through as well trait shaped nested WGS. In this design, vanadium dioxide (VO2) expected to attain functional transformation from plasmon-induced transparency (PIT) absorption. The insulating nature of VO2 results creation PIT, which characterized wide high transmission window ranging 1.944 THz 2.284 THz, corresponding relative bandwidth 7.4% above 0.9. However, when reaches metallic state, absorptivity 0.921 at 2.154 can be implemented -z-direction owing excitement toroidal dipole electric moments near-infrared And +z-direction, broadband 0.9 1.448-2.497 range takes shape virtue surface plasmon polariton modes, intensely localized oscillation free electrons confined metal-dielectric interface supported Noting that MS equipped with favorable sensitivity incidence angle, we develop an ultra-broadband backward TM mode 0.7-10 nearly all angle changes 30°-70°. Moreover, highly symmetrical structure, exhibits exotic polarization angular stability. All awesome properties make good candidate for various applications such electromagnetic wave steering, spectral analysis, sensors.

Language: Английский

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Unveiling photon-photon coupling induced transparency and absorption

Journal of Physics D Applied Physics, Journal Year: 2024, Volume and Issue: 57(46), P. 465305 - 465305

Published: Aug. 23, 2024

Abstract This study presents the theoretical foundations of analogous electromagnetically induced transparency and absorption, which we refer to as coupling (CIT) absorption (CIA), respectively, along with an exploration transition between these phenomena. We provide a concise phenomenological description analytical expressions for transmission spectra dispersion, elucidating how interplay coherent dissipative interactions in coupled system results emergence level repulsion (LR) attraction (LA), corresponding CIT CIA, respectively. theory comprehensively captures both phenomena while modelling microstrip line loaded resonators their couplings systematically. The model is validated through numerical simulations using hybrid comprising split ring resonator (SRR) electric inductive-capacitive (ELC) planar geometry. analyse two cases keeping ELC parameters constant, one involving dynamic adjustment SRR size fixed gap, other entailing varying gap maintaining constant size. Notably, first case, dispersion profile signal demonstrates LR, second case LA, effectively showcasing These simulated findings not only align but also underscore versatility our approach. Subsequently, extend more general demonstrating that controlled from CIA achievable by manipulating dissipation rate individual modes within system, leading either or modes. Our pathway designing systems can control group velocity light, offering potential applications fields optical switching quantum information technology.

Language: Английский

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Transformation of Broadband Absorption to Electromagnetically-Induced Transparency Utilizing Terahertz Metamaterial-Based Phase Change Vanadium Dioxide

Journal of Electronic Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 27, 2024

Language: Английский

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