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. © 2008 American Institute of Physics.
Subwavelength imaging of light confinement in high- Q /small- v photonic crystal nanocavity / Lalouat, Loic; Cluzel, Benoit; De Fornel, Fŕd́rique; Velha, Philippe; Lalanne, Philippe; Peyrade, David; Picard, Emmanuel; Charvolin, Thomas; Hadji, Emmanuel. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - 92:11(2008), p. 111111. [10.1063/1.2890051]
Subwavelength imaging of light confinement in high- Q /small- v photonic crystal nanocavity
VELHA, PHILIPPE;
2008-01-01
Abstract
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. © 2008 American Institute of Physics.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
