Directional bistability and nonreciprocal lasing with cold atoms in a ring cavity

Autor:	Megyeri, Balazs, Harvie, Graeme, Lampis, Andreas, Goldwin, Jon
Rok vydání:	2018
Předmět:	Physics - Atomic Physics Physics - Optics Quantum Physics
Zdroj:	PRL 121, 163603 (2018)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.121.163603
Popis:	We demonstrate lasing into counter-propagating modes of a ring cavity using a gas of cold atoms as a gain medium. The laser operates under the usual conditions of magneto-optical trapping with no additional fields. We characterize the threshold behavior of the laser and measure the second-order optical coherence. The laser emission exhibits directional bistability, switching randomly between clockwise and counter-clockwise modes, and a tuneable nonreciprocity is observed as the atoms are displaced along the cavity axis. Comment: Authors' version, with supplemental material included. Published in PRL at https://doi.org/10.1103/PhysRevLett.121.163603
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1810.03147 Zobrazit plný text záznamu View this record from Arxiv