V. Astratov, S. Yang, S. Lam, B. Jones, D. Sanvitto, D. Whittaker, A. M. Fox, M. S. Skolnick, A. Tahraoui, P. Fry, M. Hopkinson
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引用次数: 0
Abstract
We observed whispering gallery resonances (WGMs) in semiconductor micropillars by employing geometry in which both excitation and collection of emission is in a direction normal to the sidewall surface of the pillars. The spectral positions of the peaks are found to be in a good agreement with the results of numerical modeling performed by finite difference time domain technique. The quality factors of WGMs (Q ~ 20000 for the 4-5 mum circular pillars) are found to be well in excess of Q-factors for the low k-vector "photonic dot" states measured from the same pillars. Due to high Q-factors and small modal volumes ~0.3 mum3 such WGM resonances can be used in cavity quantum electrodynamics experiments.
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