Phase-change Fano resonator for active modulation of thermal emission

Khalichi, Bahram; Ghobadi, Amir; Osgouei, Ataollah Kalantari; Omam, Zahra Rahimian; Koçer, Hasan; Özbay, Ekmel

doi:10.1039/d3nr00673e

Cited by 10 publications

(3 citation statements)

References 49 publications

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“…Optical modulation of emission with infrared (IR) planar multilayers owns great potential in various aspects, including radiative cooling, heat management, photovoltaic systems, and other fields [1][2][3][4][5][6]. Nanophotonic structures can performance dramatically different from conventional emitters, offering excellent ability to control emission and absorption [2,[6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Wide-angle and Fano-shape contrast between emission and absorption in hybrid polariton-involved planar structure

Qian,

Xu,

et al. 2024

J. Opt.

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Nonreciprocal light propagation (NLP) in planar structure has become a hot topic because of the pattern-free fabrication process and the potentials for exploring heat transfer and energy management. An effective strategy incorporated with natural van der Waals (vdW) material (α-phase molybdenum trioxide, α-MoO3}), ultra-thin polar crystal (slicon carbide, SiC) thin film and a Weyl semimetal (WSM) interlayer sitting on a metal (silver, Ag) substrate is proposed. The emission and absorption of the suggested device is explored with electromagnetic (EM) simulations that utilizethe 4×4 transfer matrix method (TMM). Angular-resolved emission shows that the Fano-shape of nonreciprocity can be maintained within wide angle range. Tunable Fano resonances (FRs) with different line shapes are demonstrated by varying the structural parameters. Moreover, the enhanced nonreciprocal radiation effect can be observed for both s- and p-polarized incidence waves. The proposal allows simultaneous control of spectral distribution and polarization of radiation, which will facilitate the active design and aplication of mid-infrared (MIR) emitters.Angular-resolved emission shows that the Fano-shape of nonreciprocity can be maintained within wide angle range. Tunable Fano resonances (FRs) with different line shapes are demonstrated by varying the structural parameters. Moreover, the enhanced nonreciprocal radiation effect can be observed for both s- and p-polarized incidence waves. The proposal allows simultaneous control of spectral distribution and polarization of radiation, which will facilitate the active design and aplication of mid-infrared (MIR) emitters.

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Section: Introductionmentioning

confidence: 99%

Wide-angle and Fano-shape contrast between emission and absorption in hybrid polariton-involved planar structure

Qian,

Xu,

et al. 2024

J. Opt.

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“…One area where this technology shows particular promise is the development of tunable, multiband, and broadband metamaterial-based absorbers for use in the infrared (IR) wavelength range. These absorbers are essential for applications in spectroscopy, thermal emission, cloaking, and sensor technologies. − Various designs have been proposed to achieve multiband absorption, including the vertical stacking of subwavelength metal structures, combining resonators of different sizes or shapes, and using grating-based Fabry–Perot (FP) structures …”

Section: Introductionmentioning

confidence: 99%

Microheater-Integrated Spectrally Selective Multiband Mid-Infrared Nanoemitter for On-Chip Optical Multigas Sensing

Rahimian Omam,

Ghobadi,

Khalichi

et al. 2023

ACS Appl. Nano Mater.

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Traditional optical gas sensors often require multiple components such as broadband infrared sources, detectors, and band-pass filters to detect various target gases, resulting in bulky and expensive sensor designs. A streamlined optical gas-sensing platform utilizing a narrowband thermal emitter with a spectrally selective response, capable of accommodating various target gases, has the potential to supplant current bulky designs. Through the on-chip integration of a narrowband metamaterial perfect absorber with a microelectromechanical system (MEMS) heater, a selective infrared source emitter could be designed. In this paper, a multiband metamaterial absorber with resonance modes located at different gas absorption signatures is developed for optical multi-gas-sensing applications. The proposed nanoemitter supports penta-band light absorption through the simultaneous excitation of phononic modes (within the hexagonal boron nitride (hBN) topmost layer) and plasmonic modes (with the spectrally selective underlying metal−insulator−metal (MIM) absorber stack). It achieves five near-perfect sharp absorption resonance peaks compatible with the H 2 S, CH 4 , CO 2 , NO, and SO 2 gas absorption signatures in the mid-infrared (MIR) spectral range. This spectrally engineered multiwavelength absorption behavior is achieved by simultaneously coupling the optical phonons (OPhs) and the plasmonic modes in the vicinity of the OPh region of hBN and by exciting plasmonic modes with the help of the spacer (ZnTe: zinc telluride) and the metallic nanogratings. Finally, this low-cost and efficient penta-band absorber is combined with a MEMSbased microheater. The microheater uses a Peano-shaped configuration to provide a highly uniform surface temperature, which is crucial for accurate and reliable gas sensing. The proposed platform demonstrates excellent potential in terms of cost-effectiveness, source-free operation, and suitability for multi-gas-sensing platforms.

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“…In addition, metamaterials are utilized for chiral imaging 12 , cloaking 13 , and concentrators 14 . Moreover, metamaterials are widely used for broadband IR absorbers and thermal camouflage applications 15 – 17 . The fractal metamaterial technology builds metamaterials using fractal structure.…”

Section: Introductionmentioning

confidence: 99%

All silicon MIR super absorber using fractal metasurfaces

Ali,

Ghanim,

Othman

et al. 2023

Sci Rep

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Perfect absorbers can be used in photodetectors, thermal imaging, microbolometers, and thermal photovoltaic solar energy conversions. The spectrum of Mid-infrared (MIR) wavelengths offers numerous advantages across a wide range of applications. In this work, we propose a fractal MIR broadband absorber which is composed of three layers: metal, dielectric, and metal (MDM), with the metal being considered as n-type doped silicon (D-Si) and the dielectric is silicon carbide (SiC). The architectural design was derived from the Sierpinski carpet fractal, and different building blocks were simulated to attain optimal absorption. The 3D finite element method (FEM) approach using COMSOL Multiphysics software is used to obtain numerical results. The suggested fractal absorber exhibits high absorption enhancement for MIR in the range between 3 and 9 µm. D-Si exhibits superior performance compared to metals in energy harvesting applications that utilize plasmonics at the mid-infrared range. Typically, semiconductors exhibit rougher surfaces than noble metals, resulting in lower scattering losses. Moreover, silicon presents various advantages, including compatibility with complementary metal–oxide–semiconductor (CMOS) and simple manufacturing through conventional silicon fabrication methods. In addition, the utilization of doped silicon material in the mid-IR region facilitates the development of microscale integrated plasmonic devices.

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Phase-change Fano resonator for active modulation of thermal emission

Abstract: Optical modulation of heat emission using spectrally selective infrared (IR) metasurface nanoantenna designs has found potential applications in various fields, including radiative cooling and thermal camouflage. While radiative cooling requires...

Cited by 10 publications

References 49 publications

Wide-angle and Fano-shape contrast between emission and absorption in hybrid polariton-involved planar structure

Wide-angle and Fano-shape contrast between emission and absorption in hybrid polariton-involved planar structure

Microheater-Integrated Spectrally Selective Multiband Mid-Infrared Nanoemitter for On-Chip Optical Multigas Sensing

All silicon MIR super absorber using fractal metasurfaces

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