Control of spontaneous emission by complex nanostructures.
Spontaneous emission in the presence of complex nanostructures is discussed by use of a calculational scheme that permits us to deal with interfaces of arbitrary shape. Control over the field associated with the emission is shown to be attainable. In particular, decay rates are offered for geometries that lead to focusing and collimation of near- and far-field distributions. Emission from axially symmetric gratings is shown to lead to narrow angular distributions of emission, and focusing at the foci of dielectric ellipsoids is achieved for dimensions comparable with the wavelength. In the latter case the total emission rate for two atoms in an ellipsoidal cavity is shown to be enhanced in a way that deviates from the predictions of the Dicke effect by means of intermediate- and far-field contributions.
Blanco
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LA
Donostia International Physics Center Consejo Superior de Investigaciones Cientificas and Centro Mixto Universidad del Pais Vasco/Euskal Herriko Unibertsitatea, Apartado 1072, 20080 San Sebastián, Spain. swxbljil@sc.ehu.es
García de Abajo
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FJ