Abstract
A near-field microscope coupled with a near-infrared (NIR) supercontinuum source is developed and applied to characterize optical modes in a three-dimensional (3D) woodpile photonic crystal (PC) possessing a NIR partial bandgap. Spatially resolved near-field intensity distributions under different illumination wavelengths demonstrate that the electric fields preferentially dwell in the polymer rods or in the gaps between rods, respectively, for frequencies below or above the stop gap, as predicted by the 3D finite-difference time-domain modeling. Near-field microspectroscopy further reveals that the position-dependent band-edge effect plays an important role in PC-based all-optical integrated devices.
© 2008 Optical Society of America
Full Article | PDF ArticleMore Like This
Jiafang Li, Baohua Jia, Guangyong Zhou, and Min Gu
Opt. Express 14(22) 10740-10745 (2006)
Michael James Ventura and Min Gu
Opt. Express 16(12) 9112-9117 (2008)
Jiafang Li, Baohua Jia, and Min Gu
Opt. Express 16(24) 20073-20080 (2008)