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arXiv · 2310.18661

Mode-locked GaN waveguide polariton laser

H. Souissi·M. Gromovyi·I. Septembre·V. Develay·C. Brimont·L. Doyennette·E. Cambril·S. Bouchoule·B. Alloing·E. Frayssinet·J. Zúñiga-Pérez·T. Ackemann·G. Malpuech·D. D Solnyshkov·T. Guillet
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Abstract

So far, exciton-polariton (polariton) lasers were mostly single mode lasers based on microcavities. Despite the large repulsive polariton-polariton interaction, pulsed mode-locked polariton laser was never reported. Here, we use a $60 \ \mu m-$long GaN-based waveguide surrounded by distributed Bragg reflectors forming a multi-mode horizontal cavity. We demonstrate experimentally and theoretically a polariton mode-locked micro-laser operating in the blue-UV, at room temperature, with a 300$\ GHz$ repetition rate and 100$\ fs$-long pulses. The mode locking is demonstrated by the compensation (linearization) of the mode dispersion by the self-phase modulation induced by the polariton-polariton interaction. It is also supported by the observation in experiment and theory of the typical envelope frequency profile of a bright soliton.

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H. Souissi, M. Gromovyi, I. Septembre, V. Develay, C. Brimont, L. Doyennette, E. Cambril, S. Bouchoule, B. Alloing, E. Frayssinet, J. Zúñiga-Pérez, T. Ackemann, G. Malpuech, D. D Solnyshkov, T. Guillet. 2023-10-28. Mode-locked GaN waveguide polariton laser. https://doi.org/10.1364/optica.524753

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