Spontaneous emission properties of a quasi-continuum

Martin P. van Exter, Gerard Nienhuis, J. P. Woerdman

In the literature two different simplified expressions exist for the spontaneous emission factor \ensuremath{\beta}, being the fraction of spontaneous emission radiated into a specific optical mode. These expressions are valid in two mutually exclusive regimes. By treating the coupling between one discrete cavity mode and the outside optical continuum quasi one dimensionally in the spirit of Fano [Phys. Rev. 124, 1866 (1961)], we extend the validity range of both expressions and show that they lead to essentially the same result. The relevance and limitation of this result are discussed. \textcopyright{} 1996 The American Physical Society.

Dan Agassi

D. V. Skobelʹt︠s︡yn

Jung‐Tsung Shen, Shanhui Fan

A two-level system coupled to a one-dimensional continuum is investigated. By using a real-space model Hamiltonian, we show that spontaneous emission can coherently interfere with the continuum modes and gives interesting transport properties. The technique is applied to various related problems with different configurations, and analytical solutions are given.

ALBERT ROSE

Xiao-shen Li, GONG CHANG-DE, (1)南京大学物理系; (2)中国高等科学技术中心(世界实验室)理论物理中心,南京大学物理系

The surface-dressed optical Bloch equations and the Maxwell equations are combined consistently to obtain spontaneous decay rates and frequency shifts for an atom near the surface of a superlattice film with periodic or quasi-periodic structure. The effects of the number, thickness and dielectric properties of the layers constructing this film on the spontaneous emission properties are discussed. The results for the two different cases of periodic structure and quasi periodic structure are comparable.