Research activities

Our activity is mostly experimental and includes growth by molecular beam epitaxy, nanofabrication in clean room and optics experiments. In addition, we are involved in the design of the structures, in close collaboration with colleagues who are leading specialists in the modelling of photonic nanostructures. Finally, we also investigate in detail the physics of these devices, in order to optimize their performance. Our main current research topics are detailed below.



Nature Photonics cover

1D photonic systems for quantum optics


Fiber-like photonic nanowires are monomode waveguides made of a high refractive index material. In strak contrast with microcavities (Purcell effect), they ensure a broadband spontaneous emission control of an embedded emitter. We are interested in the fundamental mechanisms associated with SE control in these structures, in order to optimize their performance. In addition, we take advantage of their unique properties to realise ultrabright sources of quantum light (single photon sources and sources of entangled photon pairs).



Whispering gallery mode resonators and non-linear generation of THz radiation


Whispering gallery modes (WGM) are confined by total internal reflection at the periphery of a resonator featuring a circular section. We develop micro-cylinder resonators which combine key assets for the realization of a WGM microlaser. Our principal objective is the realization of a compact and innovative THz source, using a non-linear frequency difference between to WGM lasing in the near infrared.



Ultrafast switching of optical microcavities


In collaboration with the group of Willem Vos, we investigate several strategies to switch the resonance frequency of III-As microcavities. The underlying priciple is to induce a fast change in the refractive index of the material constituting the cavity, using a pump light pulse. These researches address a broad spectrum of applications, ranging from the development of ultrafast optical switches for telecommunications to the study of more fundamental physical effects.









Quantum coherence - CQ

Quantum coherence - CQ

Revealing quantum phenomena in electronic nano-circuits
Helium : from fundamental to applications - HELFA

Helium : from fundamental to applications - HELFA

Helium as model system, hydrodynamic and turbulence, space and astrophysics, instrumentation and cryogenic development, kinetic inductance detectors.
Magnetism and Superconductivity - MagSup

Magnetism and Superconductivity - MagSup

Team Magnetism and Superconductivity at Institut NEEL - Systems involving charge, spin or lattice degrees of freedom.
Optics and materials - OPTIMA

Optics and materials - OPTIMA

a complete chain of competences that goes from the design and elaboration of new materials to the study of nonlinear optical properties and plasmonics
Materials, Radiations, Structure - MRS

Materials, Radiations, Structure - MRS

Understanding of the physico-chemical properties of complex materials based on the precise description of their structure
Micro and NanoMagnetism - MNM

Micro and NanoMagnetism - MNM

Complementary expertise in fabrication, characterisation, and simulations for studies in nanomagnetism with applications in spin electronics and micro-systems
Quantum Nano-Electronics and Spectroscopy - QNES

Quantum Nano-Electronics and Spectroscopy - QNES

Electron transport and local spectroscopy of quantum structures
Nano-Optics and Forces - NOF

Nano-Optics and Forces - NOF

Nano - optics and forces
Nanophysics and Semiconductors - NPSC

Nanophysics and Semiconductors - NPSC

Growth of III-V and II-VI semiconductor nanostructures and their physics in search of new functions for potential applications.
Nanospintronics and Molecular Transport - NanoSpin

Nanospintronics and Molecular Transport - NanoSpin

Studying magnetism at the nanoscale, where classical and quantum properties can be combined and used for molecular quantum spintronics
Wide bandgap semiconductors - SC2G

Wide bandgap semiconductors - SC2G

Physics of diamond and other wide bandgap semiconductors towards applications in electronics and biotechnologies
Surfaces, Interfaces and Nanostructures - SIN

Surfaces, Interfaces and Nanostructures - SIN

Experimental and theoretical studies of low dimensional systems
Hybrid systems at low dimensions - HYBRID

Hybrid systems at low dimensions - HYBRID

Electronic, optical, vibrational, mechanical properties, as well as their interplay at the nanoscale, of novel hybrid systems (nanotubes, graphene, two-dimensional and functionalized materials) which are developed by the group .
Condensed Matter Theory -TMC

Condensed Matter Theory -TMC

Novel physical phenomena in materials and model systems.
Thermodynamics and Biophysics of small systems - TPS

Thermodynamics and Biophysics of small systems - TPS

Ultra-sensitive instrumentation for electrical and thermal measurements: from biophysics to low temperature condensed matter physics.
Theory of Quantum Circuits - ThQC

Theory of Quantum Circuits - ThQC

Theoretical studies of electronic transport in nanometer-scale devices showing remarkable quantum effects.
Ultra-low temperatures - UBT

Ultra-low temperatures - UBT

Quantum physics at the ultra-low temperature frontier.

Ultrafast switching of optical microcavities

In collaboration with the group of Willem Vos, we investigate several strategies to switch the resonance frequency of III-As microcavities. The underlying priciple is to induce a fast change in the refractive index of the material constituting the cavity, using a pump light pulse. To this end,... > read more

Whispering gallery mode resonators and non-linear generation of THz radiation

Whispering gallery modes (WGM) are confined by total internal reflection at the periphery of a resonator featuring a circular section. We develop micro-cylinder resonators which combine key assets for the realization of a WGM microlaser. Our principal objective is the realization of a compact... > read more

1D photonic systems for quantum optics

Following the inspiration of atomic physics, spontaneous emission (SE) control in semiconductors has been first achieved using the Purcell effect that arises in high-Q microcavities. To overcome the tiny operation bandwidth inherent to a resonant effect, we have recently introduced fiber-like... > read more

© Institut Néel 2012 l Webdesign chrisgaillard.com l Powered by spip l Last update mardi 5 juin 2018 l