Design of plasmonic nanoantennae for enhancing spontaneous emission

Year: 2007

Authors: Rogobete L., Kaminski F., Agio M., Sandoghdar V.

Autors Affiliation: ETH, Phys Chem Lab, CH-8093 Zurich, Switzerland.

Abstract: We apply two- and three-dimensional numerical calculations to study optical nanoantennae made of two coupled gold nanostructures, enclosing a single emitter in their gap. We show that, using structures manufacturable with today’s nanotechnology, it is possible to increase the radiative decay rate by three orders of magnitude while keeping a quantum efficiency larger than 80% in the near-infrared regime. We examine the competition between the radiative and nonradiative processes in the presence of the antennae as a function of wavelength and antenna geometry. Our results hold great promise for improving the quantum efficiency of poor emitters such as silicon nanocrystals or carbon nanotubes.

Journal/Review: OPTICS LETTERS

Volume: 32 (12)      Pages from: 1623  to: 1625

KeyWords: Optical-properties; Decay; Molecule; Nanostructures; Fluorescence; Particles
DOI: 10.1364/OL.32.001623

Citations: 234
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