Spontaneous emission from a two-level atom in a three-dimensional photonic crystal

Yaping Yang, Shi Yao ZHU

Research output: Contribution to journalArticlepeer-review

98 Citations (Scopus)

Abstract

We investigate spontaneous emission from a two-level atom embedded in a photonic crystals with three-dimensional dispersion relation, where the dependence of wave vectors on direction is taken into account. Due to the difference of the density of states of electromagnetic modes between a three-dimensional and a one-dimensional photonic crystal (lack of singularity), the dynamics of the population in the excited state and the emitted field are quite different from those of a one-dimensional photonic crystal. There is no quasi-oscillation for the population evolution. The localized field and the propagating field cannot coexist. When the upper level moves from the gap to the band, the emitted field changes from a localized field to a diffusion field and then to a propagating field. The energy of the diffusion and propagating fields propagates out incoherently and coherently, respectively. An analytical expression for the Lamb shift is obtained. The Lamb shift for the current case is smaller than that in an ordinary vacuum or in one-dimensional photonic crystals.

Original languageEnglish
Article number013805
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume62
Issue number1
DOIs
Publication statusPublished - Jun 2000

Scopus Subject Areas

  • Atomic and Molecular Physics, and Optics

Fingerprint

Dive into the research topics of 'Spontaneous emission from a two-level atom in a three-dimensional photonic crystal'. Together they form a unique fingerprint.

Cite this