The power density in the vicinity of a tapered fiber is calculated, with the vectorial model of step-index circular waveguides. For the fundamental HE11 mode carrying a power of 1 Watt, we show that it is possible to obtain theoretical densities in the range of 108 W/cm2 at the fiber surface. The promising use of such intense evanescent fields as “atomic mirrors” is considered, and the feasibility of these guides is investigated.
© 1999 Optical Society of America
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2400) Fiber optics and optical communications : Fiber properties
Jacques Bures and René Ghosh, "Power density of the evanescent field in the vicinity of a tapered fiber," J. Opt. Soc. Am. A 16, 1992-1996 (1999)