Polariton lasing in AlGaN microring with GaN/AlGaN quantum wells

Anthonin Delphan, Maxim N. Makhonin, Tommi Isoniemi, Paul M. Walker, Maurice S. Skolnick, Dmitry N. Krizhanovskii, Dmitry V. Skryabin, Jean François Carlin, Nicolas Grandjean, Raphaël Butté

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5 Citations (SciVal)


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 toward the development of novel UV devices based on the high-speed slab waveguide polariton geometry operating up to room temperature with the potential to be integrated into complex photonic circuits.

Original languageEnglish
Article number021302
JournalAPL Photonics
Issue number2
Early online date2 Feb 2023
Publication statusPublished - 28 Feb 2023

Bibliographical note

Funding Information:
We acknowledge the UK EPSRC Grant Nos. EP/V026496/1, EP/S030751/1, and EP/R007977/1. Anthonin Delphan would like to thank Christopher Vickers and Thomas Ball for their help with the cryogenics setup.

The data that support the findings of this study are available from the corresponding author upon reasonable request.

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Computer Networks and Communications


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