Abstract
So far, exciton-polariton (polariton) lasers were mostly single-mode lasers based on microcavities. Despite the large repulsive polariton-polariton interaction, a pulsed mode-locked polariton laser was never, to our knowledge, reported. Here, we use a 60-µm-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.
| Original language | English |
|---|---|
| Pages (from-to) | 962-970 |
| Number of pages | 9 |
| Journal | Optica |
| Volume | 11 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 10 Jul 2024 |
Funding
The authors acknowledge fundings from the French National Research Agency (ANR-11-LABX-0014, ANR-21-CE24-0019-01, IDEX-ISITE 16-IDEX-0001 "CAP 20-25") and the Region Occitanie (ALDOCT-001065), and the support of the European Union’s Horizon 2020 program, through a FET Open research and innovation action under the grant agreement No. 964770 (TopoLight). C2N is a member of RENATECH-CNRS, the French national network of large micro-nanofacilities.
Keywords
- polariton laser
- mode-locked laser
- blue-UV
- waveguide
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