Spontaneous emission in the near-field of 2D photonic crystals
msra(2005)
摘要
We show theoretically that photonic crystal membranes cause large variations
in the spontaneous emission rate of dipole emitters, not only inside but also
in the near-field above the membranes. Our three-dimensional finite difference
time-domain calculations reveal an inhibition of more than five times and an
enhancement of more than ten times for the spontaneous emission rate of
emitters with select dipole orientations and frequencies. Furthermore we
demonstrate theoretically, the potential of a nanoscopic emitter attached to
the end of a glass fiber tip as a local probe for mapping the large spatial
variations of the photonic crystal local radiative density of states. This
arrangement is promising for on-command modification of the coupling between an
emitter and the photonic crystal in quantum optical experiments.
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关键词
photonic crystal,finite difference time domain,spatial variation,near field,quantum optics,density of state,glass fiber,three dimensional,spontaneous emission
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