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arXiv · 1510.05562

Spatiotemporal coherence of non-equilibrium multimode photon condensates

Jakov Marelic·Lydia F. Zajiczek·Henry J. Hesten·Kon H. Leung·Edward Y. X. Ong·Florian Mintert·Robert A. Nyman
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Abstract

We report on the observation of quantum coherence of Bose-Einstein condensed photons in an optically-pumped, dye-filled microcavity. We find that coherence is long-range in space and time above condensation threshold, but short-range below threshold, compatible with thermal-equilibrium theory. Far above threshold, the condensate is no longer at thermal equilibrium and is fragmented over non-degenerate, spatially overlapping modes. A microscopic theory including cavity loss, molecular structure and relaxation shows that this multimode condensation is similar to multimode lasing induced by imperfect gain clamping.

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Jakov Marelic, Lydia F. Zajiczek, Henry J. Hesten, Kon H. Leung, Edward Y. X. Ong, Florian Mintert, Robert A. Nyman. 2016-02-19. Spatiotemporal coherence of non-equilibrium multimode photon condensates. https://doi.org/10.1088/1367-2630%2F18%2F10%2F103012

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