We report on the experimental demonstration of negative coupling constants between defect guides in a waveguide lattice. We find that coupling can only be negative if the defects are negative and an odd number of lattice sites is between the defect guides.
© 2012 Optical Society of America
Original Manuscript: September 23, 2011
Revised Manuscript: December 2, 2011
Manuscript Accepted: December 20, 2011
Published: February 8, 2012
J. M. Zeuner, M. C. Rechtsman, R. Keil, F. Dreisow, A. Tünnermann, S. Nolte, and A. Szameit, "Negative coupling between defects in waveguide arrays," Opt. Lett. 37, 533-535 (2012)