We study numerically a group of asymmetric open cavities located at the exit of a photonic crystal waveguide. High angular confinement and deflection of the photonic beam are detected with zero side lobes. We further demonstrate, for the first time to our knowledge, the potential application of generalized open cavities in realizing optical switches/modulators with beam deflection. Finally, the frequency-domain response of the device is investigated and high bandwidth operation can be realized to cover some of the most commonly used transmission windows in the optical-fiber-communication regime.
© 2010 Optical Society of America
Original Manuscript: November 9, 2009
Revised Manuscript: March 17, 2010
Manuscript Accepted: April 9, 2010
Published: May 6, 2010
Maoqing Xin, Liang Zhang, Ching Eng Png, Jing Hua Teng, and Aaron J. Danner, "Asymmetric open cavities for beam steering and switching from line-defect photonic crystals," J. Opt. Soc. Am. B 27, 1153-1157 (2010)