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...
-
February 2021 (v1)Journal articleUploaded on: December 4, 2022
-
May 6, 2024 (v1)Journal article
Bound states in the continuum (BICs) are of special interest in photonics due to their theoretically infinite radiative lifetime. In this work, we take a specific example (a structure composed of GaN and a TiO2 photonic crystal slab), showcasing how the interactions affect BICs. The photonic BIC hosted by the photonic crystal slab couples with...
Uploaded on: April 5, 2025 -
June 5, 2023 (v1)Conference paper
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...
Uploaded on: December 10, 2023 -
July 1, 2024 (v1)Conference paper
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...
Uploaded on: January 13, 2025 -
October 1, 2024 (v1)Publication
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...
Uploaded on: January 13, 2025 -
2018 (v1)Conference paper
International audience
Uploaded on: December 4, 2022