Spontaneous emission from a two-level atom in a bisphere microcavity

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Tetsuyuki Ochiai,¹ Jun-ichi Inoue,¹ and Kazuaki Sakoda^1,2
¹Quantum Dot Research Center, National Institute for Materials Science (NIMS), Tsukuba 305-0044, Japan
²Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8577, Japan

Received 17 April 2006; published 18 December 2006

Dynamicsof the spontaneous emission from a two-level atom embedded ina bisphere microcavity is analyzed theoretically. A bisphere supports amorphology-dependent resonance having such a high quality factor with localfield enhancement that the strong coupling between the atom andthe cavity can be realized. By taking full account ofthe photon degree of freedom, we derive theoretically the couplingconstant between the atom and the cavity as well asthe radiation damping constants, which are used in the conventionalcavity QED approach. In addition, we show that the powerspectrum of the spontaneous emission at a local observation pointis strongly affected by the photon Green function.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.74.063818
DOI:	10.1103/PhysRevA.74.063818
PACS:	42.50.Pq; 42.50.Ct; 42.55.Sa 42.50.Pq Cavity quantum electrodynamics; micromasers 42.50.Ct Quantum description of interaction of light and matter; related experiments 42.55.Sa Microcavity and microdisk lasers YEAR: 2006
KEYWORDS:	spontaneous emission, microcavities, quantum optics, quantum electrodynamics, Green's function methods

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