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Title: 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.
Authors:
; ; ; ; ;  [1] ;  [2] ; ; ; ;  [3]
  1. European Laboratory for Non-linear Spectroscopy, 50019 Sesto Fiorentino (Italy)
  2. (Italy)
  3. Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne (Switzerland)
Publication Date:
OSTI Identifier:
22482025
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 10; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONFIGURATION; COUPLING; CRYSTALS; DENSITY OF STATES; GALLIUM NITRIDES; MAPPING; OPTICAL MICROSCOPES; OPTICAL MODES; POLARIZATION; RESONANCE; SCATTERING; VISIBLE RADIATION; WAVELENGTHS