Recently, photonic crystal band-edge structures have been analyzed in the literature. However, most devices that have been presented so far emit light in different directions. We present a modal analysis (no gain included) of a few schemes to improve the directionality of these devices, i.e., in such a way that light that exits from them will travel mainly in a certain direction, eventually coupling its energy to a wide waveguide.
© 2005 Optical Society of America
Original Manuscript: August 3, 2004
Revised Manuscript: December 27, 2004
Manuscript Accepted: January 4, 2005
Published: May 20, 2005
Haroldo T. Hattori, Vitor M. Schneider, Rogério M. Cazo, and Carmem L. Barbosa, "Analysis of strategies to improve the directionality of square lattice band-edge photonic crystal structures," Appl. Opt. 44, 3069-3076 (2005)