Purcell Effect
  • Atomic spontaneous emission is proportional to the vacuum energy density, which is inversely proportional to the mode volume
  • The spontaneous emission can therefore be enhanced in a small cavity (small V) by the Purcell factor Fp given by


the vacuum Rabi frequency

the cavity quality factor

  • As seen from its relation with the vacuum Rabi frequency, the Purcell factor comes from the cavity-QED principle.
Purcell factor can be large in micro & nano cavities
Last updated: February 25, 2014