Freiburg 2024 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
A: Fachverband Atomphysik
A 3: Bosonic Quantum Gases I (joint session Q/A)
A 3.5: Vortrag
Montag, 11. März 2024, 12:00–12:15, Aula
Bose-Einstein condensation of photons in a vertical-cavity surface-emitting laser — Maciej Pieczarka1, Marcin Gebski2, Aleksandra N. Piasecka1, James A. Lott3, •Axel Pelster4, Michał Wasiak2, and Tomasz Czyszanowski2 — 1Department of Experimental Physics, Wrocław University of Science and Technology, Poland — 2Institute of Physics, Łodź University of Technology, Poland — 3Institute of Solid State Physics and Center of Nanophotonics, Technical University Berlin, Germany — 4Physics Department and Research Center OPTIMAS, RPTU Kaiserslautern-Landau, Germany
Here we show the Bose-Einstein condensation of photons in a broad-area vertical-cavity surface-emitting laser with positive cavity mode-gain peak energy detuning. We observed a Bose-Einstein condensate in the fundamental transversal optical mode at the critical phase-space density. The experimental results follow the equation of state for a two-dimensional gas of bosons in thermal equilibrium, although the extracted spectral temperatures were lower than those of the device. This is interpreted as originating from the driven-dissipative nature of the device and the stimulated cooling effect. In contrast, non-equilibrium lasing action is observed in the higher-order modes in a negatively detuned device. Our work opens the way for the potential exploration of superfluid physics of interacting photons mediated by semiconductor optical non-linearities. It also shows great promise for enabling single-mode high-power emission from a large aperture device.
[1] M. Pieczarka, M. Gebski, A.N. Piasecka, J.A. Lott, A. Pelster, M. Wasiak, and T. Czyszanowski, arXiv:2307.00081
Keywords: photon Bose-Einstein condensate; vertical-cavity surface-emitting laser; laser rate equations; equation of state; spectral temperature