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arXiv · 1912.11358

Photon thermalization and a condensation phase transition in an electrically pumped semiconductor microresonat

S. Barland·P. Azam·G. L. Lippi·R. A. Nyman·R. Kaiser
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Abstract

We report on an experimental study of photon thermalization and condensation in a semiconductor microresonator in the weak-coupling regime. We measure the dispersion relation of light and the photon mass in a single-wavelength, broad-area resonator. The observed luminescence spectrum is compatible with a room-temperature, thermal-equilibrium distribution. A phase transition, identified by a saturation of the population at high energies and a superlinear increase of the occupation at low energy, takes place when the phase-space density is of order unity. We explain our observations by Bose-Einstein condensation of photons in equilibrium with a particle reservoir and discuss the relation with laser emission.

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S. Barland, P. Azam, G. L. Lippi, R. A. Nyman, R. Kaiser. 2019-12-23. Photon thermalization and a condensation phase transition in an electrically pumped semiconductor microresonat. https://arxiv.org/abs/1912.11358

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