Quadrupole transitions near interface: general theory and application to atom inside a planar cavity

Details Quadrupole transitions near interface: general theory and application to atom inside a planar cavity Quadrupole transitions near interface: general theory and application to atom inside a planar cavity

2005-04-18

arxiv.org/abs/physics/0504119v2

Physics

Optics

18 pages, 7 figures

Scientific paper

10.1103/PhysRevA.72.043809

Quadrupole radiation of an atom in an arbitrary environment is investigated within classical as well as quantum electrodynamical approaches. Analytical expressions for decay rates are obtained in terms of Green function of Maxwell equations. The equivalence of both approaches is shown. General expressions are applied to analyze the quadrupole decay rate of an atom placed between two half spaces with arbitrary dielectric constant. It is shown that in the case when the atom is close to the surface, the total decay rate is inversely proportional to the fifth power of distance between an atom and a plane interface.

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