2022/10/28 by Anthonin Delphan, Delphan, Anthonin, M. N. Makhonin +17
Engineering · Physics and Astronomy · #Blueshift #Condensed matter physics #Exciton #FOS: Physical sciences #Laser #Lasing threshold #Materials science #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Optics #Optics (physics.optics) #Optoelectronics #Photoluminescence #Photonic Crystals and Applications #Photonic and Optical Devices #Photonics #Physics #Polariton #Quantum well #Resonator #Strong Light-Matter Interactions #Wavelength
paper · pdf · doi:10.48550/arxiv.2210.16240
openalex publication_date 2022/10/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Microcavity polaritons are strongly interacting hybrid light-matter quasiparticles, which are promising for the development of novel light sources and active photonic devices. Here, we report polariton lasing in the UV spectral range in microring resonators based on GaN/AlGaN slab waveguides, with experiments carried out from 4 K up to room temperature. Stimulated polariton relaxation into multiple ring resonator modes is observed, which exhibit threshold-like dependence of the emission intensity with pulse energy. The strong exciton-photon coupling regime is confirmed by the significant reduction of the free spectral range with energy and the blueshift of the exciton-like modes with increasing pulse energy. Importantly, the exciton emission shows no broadening with power, further confirming that lasing is observed at electron-hole densities well below the Mott transition. Overall, our work paves the way towards development of novel UV devices based on the high-speed slab waveguide polariton geometry operating up to room temperature with potential to be integrated into complex photonic circuits.