We show the existence of flat equal-frequency contour across the entire first Brillouin zone in two-dimensional photonic crystals. Under this condition, light diffraction can be inhibited. Moreover, the beam can be highly localized between two neighboring rows of the defect-free photonic crystal. Such a finding may have novel applications in light beam manipulations and on-chip integrated photonic devices.
© 2011 Optical Society of America
Original Manuscript: November 8, 2010
Manuscript Accepted: December 24, 2010
Published: February 18, 2011
Lingling Zhang, Qiwen Zhan, Jiayu Zhang, and Yiping Cui, "Diffraction inhibition in two-dimensional photonic crystals," Opt. Lett. 36, 651-653 (2011)