CHERY , Nicolas

In this work, InGaN/GaN Multi-Quantum Wells (MQWs) with strain compensating AlGaN interlayers grown by metalorganic vapour phase epitaxy have been investigated by high resolution X-ray diffraction, transmission electron microscopy and photoluminescence (PL). For different AlGaN strain compensating layer thicknesses varying from 0 to 10.6 nm, a...

In this work, we investigate the impact of the quantum confined Stark effect and of the carrier localization on the internal quantum efficiency of polarized single or multiple InxGa1-xN/GaN quantum well(s), and semi-polar (11e22) multiple InxGa1-xN/InyGa1-yN quantum well. We find that increasing the influence of the quantum confined Stark...

SrVO3 is a strongly correlated metal which has been highly studied in recent years due to its optical and electrical properties which makes it a promising transparent conducting oxide (TCO). By investigating and optimizing these interesting properties, SrVO3 might be able to replace in the future Indium-Tin Oxide which is the most commonly used...

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...

Plasmonic hyperdoped Si nanocrystals embedded in silica synthesized via a combination of sequential low energy ion implantation and rapid thermal annealing. We show that phosphorus dopants are incorporated into the nanocrystal cores at concentrations up to six times higher than P solid solubility in bulk Si by combining 3D mapping with atom...

Plasmonic hyperdoped Si nanocrystals embedded in silica synthesized via a combination of sequential low energy ion implantation and rapid thermal annealing. We show that phosphorus dopants are incorporated into the nanocrystal cores at concentrations up to six times higher than P solid solubility in bulk Si by combining 3D mapping with atom...

Many applications as optical spectroscopy, photothermal therapy, photovoltaics or photocatalysis take advantage of localized surface plasmon resonance of noble metal nanoparticles. Among them, Ag nanoparticles are multi-functionnal nano-objects that can be used as efficient plasmonic antennae but also as electron reservoirs for charge transfer...

In this work, we analyse the microstructure and local chemical composition of green-emitting InxGa1-xN/GaN quantum well (QW) heterostructures in correlation with their emission properties. Two samples of high structural quality grown by metalorganic vapour phase epitaxy (MOVPE) with a nominal composition of x = 0.15 and 0.18 indium are...

Using localized surface plasmon resonance (LSPR) as an optical probe we demonstrate the presence of free carriers in phosphorus doped silicon nanocrystals (SiNCs) embedded in a silica matrix. In small SiNCs, with radius ranging from 2.6 to 5.5 nm, the infrared spectroscopy study coupled to numerical simulations allows us to determine the number...