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Article Dans Une Revue Applied Physics Letters Année : 2008

Subwavelength imaging of light confinement in high-Q/small-V photonic crystal nanocavity

Résumé

The optical near field of a high-Q and ultrasmall volume photonic crystal nanocavity is visualized with a subwavelength resolution by using a scanning near-field optical microscope (SNOM) operating at the same time in collection-scanning mode and in interaction-scanning mode. It is shown that the nanocavity resonant mode is selectively visualized by using the SNOM interaction-scanning mode while the whole electromagnetic field surrounding the nanocavity is probed using the SNOM collection-scanning mode. The different optical near-field images are compared in light of a three-dimensional numerical analysis and we demonstrate an unexpected mode coupling at the cavity resonance.
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Dates et versions

hal-00394794 , version 1 (11-04-2016)

Identifiants

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L. Lalouat, B. Cluzel, F. de Fornel, P. Velha, Philippe Lalanne, et al.. Subwavelength imaging of light confinement in high-Q/small-V photonic crystal nanocavity. Applied Physics Letters, 2008, 92 (11), pp.111111. ⟨10.1063/1.2890051⟩. ⟨hal-00394794⟩
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