# Hyper-doped silicon nanoantennas and metasurfaces for tunable infrared plasmonics

2 LAAS-MPN - Équipe Matériaux et Procédés pour la Nanoélectronique
LAAS - Laboratoire d'analyse et d'architecture des systèmes
3 LAAS-IDEA - Service Informatique : Développement, Exploitation et Assistance
LAAS - Laboratoire d'analyse et d'architecture des systèmes
5 LAAS-I2C - Service Instrumentation Conception Caractérisation
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : We present the experimental realization of ordered arrays of hyper-doped silicon nanodisks, which exhibit a localized surface plasmon resonance. The plasmon is widely tunable in a spectral window between 2 and 5 $\mu$m by adjusting the free carrier concentration between 10$^{20}$ and 10$^{21}$ cm$^{-3}$. We show that strong infrared light absorption can be achieved with all-silicon plasmonic metasurfaces employing nano-structures with dimensions as low as 100\,nm in diameter and 23 nm in height. Our numerical simulations show an excellent agreement with the experimental data and provide physical insights on the impact of the nanostructure shape as well as of near-field effects on the optical properties of the metasurface. Our results open highly promising perspectives for integrated all-silicon-based plasmonic devices for instance for chemical or biological sensing or for thermal imaging.
Document type :
Journal articles
Domain :

https://hal.laas.fr/hal-03040170
Contributor : Peter Wiecha <>
Submitted on : Friday, December 4, 2020 - 11:09:35 AM
Last modification on : Wednesday, June 9, 2021 - 10:00:28 AM

### Citation

Jean-Marie Poumirol, Clément Majorel, Nicolas Chery, Christian Girard, Peter Wiecha, et al.. Hyper-doped silicon nanoantennas and metasurfaces for tunable infrared plasmonics. ACS photonics, American Chemical Society,, 2021, 8 (5), pp.1393-1399. ⟨10.1021/acsphotonics.1c00019⟩. ⟨hal-03040170⟩

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