Nano-pillars metasurface modelled for perfect absorption at specific wavelengths in infrared spectral regime

Tomescu, Roxana; Kusko, C.; Cristea, Dana; Calinoiu, Ramona; Pârvulescu, Cătălin

doi:10.1016/j.ssel.2020.11.002

Cited by 5 publications

(5 citation statements)

References 24 publications

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“…Structure/ Material Bandwidth Tuning range Absorption [49] Nano-pillars metasurface 0.4 μm 2.2 -3.6 μm 90 % [50] Cross shape Si3N4/Gold stake metasurface 0.2 μm 7 -9 70 % [51] Nano disk metasurface with alternating SiO2 and TiO2 stacked geometry with GST phase change material 0.022 μm 1.902 -1.942 μm - [52] Polystyrene thin film metasurface 0.502 μm 9.5 -11 μm 96 % [53] Circular Dichroism metasurface 0.6 nm 0.726 -0.745 μm 92 % [54] Tri layer MIM stacked chiral Metasurface -5 -5.9 μm 63 % This work Single layer cross shape metasurface integrated with hexagon resonators 2 μm 7 -9.5 μm 94 %…”

Section: Refsmentioning

confidence: 99%

Interparticle-Coupled Metasurface for Infrared Plasmonic Absorption

et al. 2023

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Plasmonic metasurfaces operating in the long-wavelength infrared region (LWIR) are primarily employed for bio-sensing and imaging applications. The key factor affecting the capability of LWIR metasurfaces is absorption efficiency, whereas significant advances have been made to attain higher absorption intensities, using metal-insulator-metal (MIM) stack structures, which require a complex nanofabrication process and repetition of the patterning process to develop each layer. This study experimentally demonstrates the integration of metasurfaces with plasmonic resonators. The metasurfaces and plasmonic resonators are developed through electron beam lithography (EBL) on the same plane of the Silicon substrate. The fabricated prototype has broad incident angle stability at a bandwidth of 2µm with near-perfect absorption at 8µm resonance wavelength when characterized through the Attenuated Total Reflectance -Fourier Transforms Infrared Spectroscopy (ATR-FTIR) setup. The metasurface device achieves tunable resonance behavior when the incident angles reach up to 70°. The proposed integration of metasurface with plasmonic resonators are well-suited for enhanced biosensing applications with metasurface devices.

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Section: Refsmentioning

confidence: 99%

Interparticle-Coupled Metasurface for Infrared Plasmonic Absorption

et al. 2023

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“…The refractive index of the metals is modelled by a standard Lorentz-Drude formula. More details about the conditions we use to model and simulate a plasmonic metasurface structure are given in [5].…”

Section: Modelmentioning

confidence: 99%

Numerical analysis of plasmonic metasurfaces for fluorescence enhancement

et al. 2021

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The paper presents an extensive numerical analysis performed by three-dimensional (3D) simulations using the finite difference in time and space (FDTD) method to identify the optimal geometry, size and configuration of the nano-antennas that constitute a plasmonic metasurface. The aim was to achieve the highest resonance at various wavelengths (NIR-VIS), for local enhancement of the excitation field and collection efficiency of emitted photons. We investigated ten different types of metals, two shapes (disks and U-shape resonators) and various geometrical parameters for the nanoresonators composing the metasurface. The best results for Rhodamine 6G excitation and emission were obtained using silver resonators with 105 nm diameter of the cylinder elements in a rectangular array with a 110 nm period, and with 110 nm long U-shape placed at a period of 40 nm.

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“…A variety of chemical and physical methods have been employed for the synthesis of silver nanoparticles, like chemical reductions of metallic ions, 8 electrochemical methods, 9 laser ablation and high energy irradiation etc. 10 However these processes are expensive and often require the use of toxic and harmful chemicals and can result in the formation of dangerous by-products.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] Among nanoparticles of noble metals, silver has received much interest because of its distinguished properties 4,5 and possible utilization in biomedical science and environmental remediation. 6,7 A variety of chemical and physical methods have been employed for the synthesis of silver nanoparticles, like chemical reductions of metallic ions, 8 electrochemical methods, 9 laser ablation and high energy irradiation etc. 10 However these processes are expensive and often require the use of toxic and harmful chemicals and can result in the formation of dangerous by-products.…”

Section: Introductionmentioning

confidence: 99%