Bose-Einstein condensation of photons in an optical microcavity by Jan Klaers and others (2010, 10.1038/nature09567)

Nature 468, 545–548. The original byline credits Jan Klaers and collaborators.

The inspected author preprint, printed pp. 3–6, describes a dye-filled curved-mirror microcavity, absorption/re-emission thermalization, controlled excitation reservoir and observed condensation. Page numbering here refers to the preprint.