Spontaneous emission of a cesium atom near a nanofiber: Efficient coupling of light to guided modes
- 28 September 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 72 (3), 032509
- https://doi.org/10.1103/physreva.72.032509
Abstract
We study the spontaneous emission of a cesium atom in the vicinity of a subwavelength-diameter fiber. We show that the confinement of the guided modes and the degeneracy of the excited and ground states substantially affect the spontaneous emission process. We demonstrate that different magnetic sublevels have different decay rates. When the fiber radius is about , a significant fraction (up to 28%) of spontaneous emission by the atom can be channeled into guided modes. Our results may find applications for developing nanoprobes for atoms and efficient couplers for subwavelength-diameter fibers.
Keywords
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