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Phys Rev Lett. 2006 Mar 17;96(10):103902. Epub 2006 Mar 16.

Spontaneous emission suppression via quantum path interference in coupled microcavities.

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Centre for Ultrahigh bandwidth Devices for Optical Systems, CUDOS, School of Physics, University of Sydney 2006, Australia.


We examine theoretically the spontaneous emission rate in optical microstructures with cavity resonances that overlap in both position and frequency. Using projection techniques, we show that the spontaneous emission in such structures can be accurately described by the direct emission and quantum path interference of emission into a few discrete resonant modes, even though the exact infinite-dimensional problem involves a coupling to the continuum of radiation states. Moreover, we obtain an efficient numerical time-domain method for determining the spontaneous emission rate that incorporates these effects, including the suppression of spontaneous emission into some modes.

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