We present a direct, room-temperature near-field optical study of light confinement by a subwavelength defect microcavity in a photonic crystal slab containing quantum-well sources. The observations are compared with three-dimensional finite-difference time-domain calculations, and excellent agreement is found. Moreover, we use a subwavelength cavity to study the influence of a near-field probe on the imaging of localized optical modes.
© 2006 Optical Society of America
Original Manuscript: February 14, 2006
Revised Manuscript: April 24, 2006
Manuscript Accepted: May 7, 2006
Vol. 1, Iss. 8 Virtual Journal for Biomedical Optics
Nicolas Louvion, Adel Rahmani, Christian Seassal, Ségolène Callard, Davy Gérard, and Frédérique de Fornel, "Near-field observation of subwavelength confinement of photoluminescence by a photonic crystal microcavity," Opt. Lett. 31, 2160-2162 (2006)