Nokia Bell Labs: Photon Lasing Similar to Polariton Condensate
Nokia's Bell Labs published research comparing the photon lasing behavior in GaAs microcavities to that of a polariton condensate. The study found similarities at both low and high excitation levels.
Nokia Oyj's Bell Labs has published research detailing similarities between the lasing regime of photon lasers in gallium arsenide (GaAs) microcavities and phenomena observed in polariton condensates. The study, conducted under strong optical pumping, examined a GaAs-based microcavity sample.
The research indicated that the same sample exhibits strong coupling at low excitation powers, with a Rabi splitting of up to 15 meV. Crucially, the study demonstrated that features previously considered evidence of polariton Bose-Einstein condensation can also be observed in the weak coupling regime when the cavity functions as a standard photon laser.
Experimental results showed that the emission pattern in the lasing regime displays a sharp peak near the energy minimum, followed by a Boltzmann distribution at higher energies. This finding provides new insights into light-matter interactions and could inform the development of future optical devices.