Yu.P. Rakovich, M. Gerlach, A.L. Bradley, J.F. Donegan, T.M. Connolly, J.J. Boland, M.A. Przyjalgowski, A. Ryder, N. Gaponik and A.L. Rogach ‘Confined optical modes in small photonic molecules with semiconductor nanocrystals’ in Journal of Applied Physics, 96, (11), 2004, pp 6761 - 6765
Journal of Applied Physics 96 11
We report on the coherent coupling of whispering gallery modes (WGMs) in a photonic molecule
formed from two melamine-formaldehyde spherical microcavities coated with a thin shell of
light-emitting CdTe nanocrystals (NCs). Utilizing different excitation conditions, the splitting of the
WGM resonances originating from bonding and antibonding branches of the photonic states is
observed, and fine structure consisting of very sharp peaks resulting from lifting of the WGM
degeneracy has been detected. Time-resolved measurements showed a slight increase in the
spontaneous emission rate of NCs in a photonic molecule when compared to the spontaneous
emission rate for NCs coating a single microsphere.
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