Vectorial near-field imaging of a GaN based photonic crystal cavity

We report a full optical deep sub-wavelength imaging of the vectorial components of the electric local density of states for the confined modes of a modified GaN L3 photonic crystal nanocavity. The mode mapping is obtained with a scanning near-field optical microscope operating in a resonant forward scattering configuration, allowing the vectorial characterization of optical passive samples. The optical modes of the investigated cavity emerge as Fano resonances and can be probed without the need of embedded light emitters or evanescent light coupling into the nanocavity. The experimental maps, independently measured in the two in-plane polarizations, turn out to be in excellent agreement with numerical predictions. (C) 2015 AIP Publishing LLC.


Published in:
Applied Physics Letters, 107, 10, 101110
Year:
2015
Publisher:
Melville, Amer Inst Physics
ISSN:
0003-6951
Laboratories:




 Record created 2015-12-02, last modified 2018-01-28


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