A fully three-dimensional finite-difference time domain numerical model is presented for calculating the out-of-plane radiation loss in photonic-crystal slab waveguides. The propagation loss of a single-line defect waveguide in triangular-lattice photonic crystals is calculated for suspended-membrane, oxidized-lower-cladding, and deeply etched structures. The results show that low-loss waveguides are achievable for sufficiently suspended membranes and oxidized-lower-cladding structures.
© 2003 Optical Society of America
(230.7370) Optical devices : Waveguides
Wan Kuang, Cheolwoo Kim, Andrew Stapleton, Woo Jun Kim, and John D. O’Brien, "Calculated out-of-plane transmission loss for photonic-crystal slab waveguides," Opt. Lett. 28, 1781-1783 (2003)