A5074667240- Plasmonic and Surface Plasmon Research
- Photonic and Optical Devices
- Gold and Silver Nanoparticles Synthesis and Applications
- Optical Coatings and Gratings
- Thermal Radiation and Cooling Technologies
- Semiconductor Quantum Structures and Devices
- Metamaterials and Metasurfaces Applications
- Nanowire Synthesis and Applications
- Advanced biosensing and bioanalysis techniques
- Laser Design and Applications
- Single-cell and spatial transcriptomics
- Advanced Semiconductor Detectors and Materials
- Near-Field Optical Microscopy
- Photonic Crystals and Applications
- Spectroscopy and Laser Applications
- Quantum Dots Synthesis And Properties
- Laser-Matter Interactions and Applications
- Laser-induced spectroscopy and plasma
- Phase-change materials and chalcogenides
- Laser-Ablation Synthesis of Nanoparticles
- Chalcogenide Semiconductor Thin Films
- Genomics and Chromatin Dynamics
- Cell Image Analysis Techniques
- Photoacoustic and Ultrasonic Imaging
- Atmospheric Ozone and Climate
Centre de Biologie Structurale
2022-2024
Institut d'Électronique et des Systèmes
2015-2022
Université de Montpellier
2016-2020
Centre National de la Recherche Scientifique
2016-2020
COMUE Languedoc-Roussillon Universités
2016-2019
We propose 1D periodic, highly doped InAsSb gratings on GaSb substrates as biosensing platforms applicable for surface plasmon resonance and enhanced infrared absorption spectroscopies. Based finite-difference time-domain simulations, the electric field enhancement sensitivity refractive index variations are investigated different grating geometries. The proposed, optimized system achieves sensitivities of 900 nm RIU-1. A clear red shift well an line presented 2 thin adlayers in simulations....
Abstract A metamaterial perfect absorber based on layered, doped and undoped semiconductors is experimentally theoretically investigated. Design rules are given to control the multispectral, narrow, strong absorption features (>98% absorption) in mid‐IR spectrum. The proposed sub‐wavelength grating structures support localized surface plasmons photonic resonances associated quarter wavelength optical thickness of spacer layer. hybridize depending geometric setup material properties...
Abstract Tailored plasmonic nanoantennas are needed for diverse applications, among those sensing. Surface-enhanced infrared absorption (SEIRA) spectroscopy using adapted nanoantenna substrates is an efficient technique the selective detection of molecules by their vibrational spectra, even in small quantity. Highly doped semiconductors have been proposed as innovative materials plasmonics, especially more flexibility concerning targeted spectral range. Here, we report on rectangular-shaped,...
Surface-enhanced spectroscopy techniques using plasmonic nanoantennas or metasurfaces help to reduce the detection limit for biochemical sensing. While infrared is an excellent tool identify a molecular species, typically expensive IR light source needed. We report surface enhanced technique based on thermal emission of III–V semiconductor metasurfaces. The presence species grafted modulates spectrum analogously modulation achieved in surface-enhanced absorption (SEIRA) spectroscopy....
We report a detailed analysis of the influence doping level and nanoribbon width on localized surface plasmon resonance (LSPR) by means reflectance measurements. The plasmonic system, based one-dimensional periodic gratings highly Si-doped InAsSb/GaSb semiconductor nanostructures, is fabricated simple, accurate large-area technique fabrication. Increasing blueshifts peak while increasing ribbon results in redshift, as confirmed numerical simulations. This provides an efficient fine-tuning...
Multiplexed sequential and combinatorial imaging enables the simultaneous detection of multiple biological molecules,
We demonstrate surface enhanced infrared absorption spectroscopy using 1-dimensional highly doped semiconductors based on Si-doped InAsSb plasmonic nano-antennas. Engineering the array to support localized plasmon resonance aligned with molecular vibrational mode of interest involves finely setting doping level and nano-antenna width. Heavily nano-antennas require a wider size compared lightly resonators. Increasing level, consequently width nano-antenna, enhances ~15 nm thick organic layer...
All-semiconductor plasmonic gratings are investigated by spectroscopic nanoimaging in the vicinity of plasma frequency, where material behaves as an epsilon near-zero (ENZ) material. Both phase-sensitive scattering type nanoscopy (s-SNOM) and photoinduced force microscopy (PiFM) carried out on this structure. The obtained data models reveal that PiFM, for s-SNOM, can have a mostly dispersive line shape, contrast with recent near-field spectra photothermal AFM nanoscopic imaging ENZ...
III–V semiconductor plasmonics enables to perform microfluidic surface-enhanced mid-IR spectroscopy and access the so-called molecular fingerprint region from 6.7 μm 20 (1500–500 cm<sup>−1</sup>).
By using metal-free plasmonics, we report on the excitation of Fano-like resonances in mid-infrared where Fano asymmetric parameter, q, varies when dielectric environment plasmonic resonator changes. We use silicon doped InAsSb alloy deposited by molecular beam epitaxy GaSb substrate to realize resonators exclusively based semiconductors. first demonstrate possibility high quality samples embedded into host regrowth technique. The crystalline structure is confirmed scanning transmission...
à la diffusion de documents scientifiques niveau recherche, publiés ou non, émanant des établissements d'enseignement et recherche français étrangers, laboratoires publics privés.
Summary form only given. The development of efficient thermal emitters with controlled spectra is interest because the potential applications in infrared sensing, imaging, and thermophotovoltaics. In this work, we develop an room temperature emitter exclusively based on semiconductor materials. structure consists multilayered structures heavily-doped un-doped semiconductor. Semiconductor plasmonic resonators compose top layer structure. By careful design metamaterial perfect absorber, it...
We propose 1D periodic, highly doped InAsSb gratings on GaSb substrates as biosensing platforms applicable at the same time for surface plasmon resonance and enhanced infrared absorption spectroscopies. Finite-difference time-domain simulations frame array geometries (nanoribbon width spacing), in relation to electric field enhancement sensitivity refractive index variations, a given molecular region mid-infrared. These optimized systems achieve sensitivities of ~ 900 nm RIU <sup...
Vibrational spectroscopy techniques accomplish the task of detection and identification molecules. Plasmonic resonator substrates improve these inherently weak techniques: high electromagnetic field enhancement in proximity resonators is exploited to obtain sufficiently strong signals decrease limit.