Développement de sources supercontinuum et applications biomédicales
Fluides quantiques de lumière pour la photonique intégrée : dispositifs à polaritons guidés
Les interactions entre les excitons, particules bosoniques composées d'un électron et d'un trou liés par l'interaction coulombienne, et les photons sont grandement améliorés dans les guides d'ondes où la lumière est confinée par réflexion totale interne. Lorsque l’interaction est suffisamment importante, le régime de couplage fort entre le mode pho...
An Organic Laser Based on Thermally Activated Delayed Fluorescence with Aggregation-Induced Emission and Local Excited S...
Published in Angewandte Chemie (International ed. in English)
The spatial separation between the highest occupied and the lowest unoccupied molecular orbitals (HOMO and LUMO) in thermally activated delayed fluorescent (TADF) molecules leads to charge transfer (CT) states, which degrade the oscillator strength of emission transition and sacrifices high solid-state photoluminescence quantum yield (PLQY), togeth...
Modal properties of photonic crystal cavities and applications to lasers
Photonic crystal cavities enable strong light–matter interactions, with numerous applica-tions, such as ultra-small and energy-efficient semiconductor lasers, enhanced nonlinearities and single-photon sources. This paper reviews the properties of the modes of photonic crystal cavities, with a special focus on line-defect cavities. In particular, it...
III-nitrides on silicon : a platform for integrated photonics from the ultraviolet to the near-infrared
III-nitride semiconductors (AlN, GaN, InN and their alloys) have become an integral part of our daily lives as they are used in white, blue, green, and ultraviolet light emitting diodes, as well as laser diodes and power and high frequency electronics. This material is highly versatile due to its tuneable large direct band gap from the ultraviolet ...
π-Electronic Co-crystal Microcavities with Selective Vibronic-Mode Light Amplification: Toward Förster Resonance Energy ...
...Published in Nano letters
π-conjugated organic microcrystals often act as optical resonators in which the generated photons in the crystal are confined by the reflection at the crystalline facets and interfere to gain lasing action. Here, we fabricate microcrystals from a mixture of carbon-bridged oligo- para-phenylenevinylenes (COPVs) with energy-donor (D) and energy-accep...
Optofluidic Microlasers based on Femtosecond Micromachining Technology
Published in Optofluidics, Microfluidics and Nanofluidics
We present the different optofluidic lasers which have been realized using the Femtosecond Micromachining technique to fabricate the monolithic optofluidic structures in glass chips. We show how the great flexibility of this 3D technique allows getting different kind of optical cavities. The most recent devices fabricated by this technique as ring ...
Robust Whispering-Gallery-Mode Microbubble Lasers from Colloidal Quantum Dots.
Published in Nano letters
Microlasers hold great promise for the development of photonics and optoelectronics. Among the discovered optical gain materials, colloidal quantum dots (CQDs) have been recognized as the most appealing candidate due to the facile emission tunability and solution processability. However, to date, it is still challenging to develop CQD-based microla...
Étude de l'effet laser dans les structures à plasmon Tamm
Ce travail de thèse porte sur l'étude expérimentale de structures à plasmons Tamm actives, composées d'une couche d'argent déposée sur un miroir de Bragg semiconduc teur AlGaAs/GaAs contenant des puits quantiques InGaAs. Après une description des modes Tamm et de leurs propriétés planaires, nous nous sommes intéressés plus parti culièrement aux s...
Self-catalytic growth of CdS nanobelt and its Fabry–Perot lasing action
Published in Materials Letters
