Purcell factor enhanced scattering efficiency in optical microcavities

Details Purcell factor enhanced scattering efficiency in optical microcavities Purcell factor enhanced scattering efficiency in optical microcavities

2005-05-16

arxiv.org/abs/physics/0505106v2

Physics

Optics

Scientific paper

Scattering processes in an optical microcavity are investigated for the case of silicon nanocrystals embedded in an ultra-high Q toroid microcavity. Using a novel measurement technique based on the observable mode-splitting, we demonstrate that light scattering is highly preferential: more than 99.8% of the scattered photon flux is scattered into the original doubly-degenerate cavity modes. The large capture efficiency is attributed to an increased scattering rate into the cavity mode, due to the enhancement of the optical density of states over the free space value and has the same origin as the Purcell effect in spontaneous emission. The experimentally determined Purcell factor amounts to 883.

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