We experimentally demonstrate the difference between a ridge polariton laser, and a conventional edge-emitting ridge laser operating under electron-hole population inversion. The horizontal laser cavities are 20 -- 60 μm long GaN etched ridge structures with vertical Bragg reflectors. We investigate the laser threshold under optical pumping and assess quantitatively the effect of a varying optically-pumped length. The laser effect is achieved for an exciton reservoir length of just 15% of the cavity length, which would not be possible in a conventional ridge laser, with an inversion-less polaritonic gain about 10 times larger than in equivalent GaN lasers. The modelling of the cavity free spectral range demonstrates the polaritonic nature of the modes.
Cite
@article{arxiv.2201.04348,
title = {Ridge polariton laser: different from a semiconductor edge-emitting laser},
author = {H Souissi and M Gromovyi and T Gueye and C Brimont and L Doyennette and D Solnyshkov and G Malpuech and E Cambril and S Bouchoule and B Alloing and S Rennesson and F Semond and J Zúñiga-Pérez and T Guillet},
journal= {arXiv preprint arXiv:2201.04348},
year = {2022}
}