BOUCHOULE , S.

Diffusion at the AlN/Al0.3Ga0.7N interface was investigated by X-ray diffraction, high-angle annular dark field scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy. AlN/Al0.3Ga0.7N superlattices (SLs) have been grown at 800 °C on (111) silicon substrates by ammoniaassisted molecular beam epitaxy. Annealings on a...

We experimentally demonstrate polariton laser in a GaN ridge waveguide. The strong-coupling regime is assessed through a comparison of the measured and modeled cavity free spectral range (FSR). The findings reveal that the laser exhibits a transition from monomode to multimode operation as the temperature is increased from 70K to 150K. The...

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Le laser à polaritons en géométrie de guide d'onde intéresse de par ses propriétés uniques résultant du couplage fort exciton-photon. Cette étude se concentre sur une cavité GaN courte de 60 µm, où le fonctionnement en continu ou en régime de blocage de mode est observé. La dépendance de ces régimes est étroitement liée au spectre de gain, à la...

Le laser à polaritons en géométrie de guide d'onde intègre une couche active en régime de couplage fort exciton-photon. Dans une cavité GaN horizontale courte (60µm), nous démontrons un fonctionnement en continu ou en régime de blocage de modes contrôlable, dépendant du spectre de gain, de la dispersion de vitesse de groupe et de la...

Polaritons in waveguides offer novel potentialities for their application in optoelectronics, based on the concept of the polariton laser. Unlike a conventional semiconductor laser, polariton laser does not require any population inversion in order to stimulate the light emission, which potentially allows the creation of laser components...

Polariton lasers rely on the stimulated relaxation of polaritons instead of the population inversion involved in conventional semiconductor lasers. Exciton-polaritons are hybrid quasi-particles arising from the strong coupling between excitons and photons. Polariton lasers have first been investigated in vertical microcavities, and more...

Planar microcavities filled with active materials containing excitonic resonances host radiative exciton-polariton (polariton) modes with in-plane wave vectors within the light cone. They also host at least one mode that is guided in the cavity plane by total internal reflection and that is not radiatively coupled to the vacuum modes except...

Polaritonic waveguides are bringing new potentialities to the field of polaritonics. The low waveguide losses allow for long propagation distances, up to hundreds of microns. In GaAs waveguides at T=4K, the formation of bright temporal solitons was demonstrated [1], as well as the generation of a super-continuum. Wide bandgap materials offer...

The physics of gain in interband semiconductor lasers is mostly discussed in terms of population inversion for electrons and holes and the associated Bernard-Durrafourg condition. Due to the reciprocity between the processes of absorption and stimulated emission, one consequence is that lasing action can only be reached in standard ridge lasers...

We present a ridge waveguide polariton laser very similar to standard ridge lasers but, operating on a fundamentally different lasing scheme. The structure consists in a GaN waveguide, operating under strong coupling up to 300K with a 80meV Rabi splitting, and grown by metal-organic vapor phase epitaxy (MOVPE) on c-plane sapphire. Polariton in...