By using scanning near-field optical microscopy, we directly map the subwavelength confinement of light around a point defect in a two-dimensional photonic crystal microresonator. Comparison of our results with the outcome of three-dimensional finite-difference time domain calculations allows us to identify small imperfections in the structure that result in the spatial modification of the intensity distribution.
© 2004 Optical Society of America
Patrick Kramper, Maria Kafesaki, Costas M. Soukoulis, Albert Birner, Frank Müller, Ulrich Gösele, Ralf B. Wehrspohn, Jürgen Mlynek, and Vahid Sandoghdar, "Near-field visualization of light confinement in a photonic crystal microresonator," Opt. Lett. 29, 174-176 (2004)