Inhibited spontaneous emission of quantum dots observed in a 3D photonic band gap

Details Inhibited spontaneous emission of quantum dots observed in a 3D photonic band gap Inhibited spontaneous emission of quantum dots observed in a 3D photonic band gap

2011-06-08

arxiv.org/abs/1106.1681v1

Phys. Rev. Lett. 107, 193903:1-5 (2011)

Physics

Optics

5 figures

Scientific paper

10.1103/PhysRevLett.107.193903

We present time-resolved emission experiments of semiconductor quantum dots in silicon 3D inverse-woodpile photonic band gap crystals. A systematic study is made of crystals with a range of pore radii to tune the band gap relative to the emission frequency. The decay rates averaged over all dipole orientations are inhibited by up to a factor of 12\times in the photonic band gap, and enhanced up to 2\times outside the gap, in quantitative agreement with theory. We discuss the effects of spatial inhomogeneity, non-zero non-radiative decay, and transition dipole orientations on the observed inhibition in the band gap.

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