Y.P. Rakovich, J.F. Donegan, M. Gerlach, A.L. Bradley, T.M. Connolly, J.J. Boland, N. Gaponik, and A. Rogach, Fine structure of coupled optical modes in photonic molecules, Physical Review A, 70, 5, 2004, 051801(R) - 051801(R)
Physical Review A; 70; 5;
We report on the coherent coupling of whispering gallery modes (WGM) in a photonic molecule formed
from two melamine-formaldehyde spherical microcavities with a thin shell of CdTe nanocrystals. Utilizing a
microporous polymer structure to orient the photonic molecule, we have excited the photonic molecule both on
and off axis. This controllable geometry has allowed the observation of an off-axis fine structure that consists
of very sharp peaks resulting from the removal of the WGM degeneracy with respect to the azimuthal quantum
number m. The mode splittings are in very good agreement with theory.
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