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Two-photon cavity solitons in active optical media

Vilaseca, R.; Torrent, M.C.; García-Ojalvo, J.; Brambilla, M.; San Miguel, M.
Physical Review Letters 87, 083902 (1-4) (2001)

We show that broad-area cascade lasers support the
spontaneous formation of two-dimensional bright localized
structures in a dark background. These cavity solitons
consist of islands of two-photon emission embedded in a
background of single-photon emission. We discuss the
mechanism through which these strucutres are formed, along
with their properties and stability.

paper.pdf