Near-field imaging of coupled photonic-crystal microcavities

Vignolini, Silvia; Intonti, Francesca; Zani, Margherita; Riboli, Francesco; Wiersma, Diederik S.; Li, Lianhe H.; Balet, Laurent; Francardi, Marco; Gerardino, Annamaria; Fiore, Andrea; Gurioli, Massimo
April 2009
Applied Physics Letters;4/13/2009, Vol. 94 Issue 15, p151103
Academic Journal
We report by means of near-field microscopy on the coupling between two adjacent photonic crystal microcavities. Clear-cut experimental evidence of the spatial delocalization of coupled-cavity optical modes is obtained by imaging the electromagnetic local density of states. We also demonstrate that it is possible to design photonic structures with selective coupling between different modes having orthogonal spatial extensions


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