We present a simple and robust structure for realizing asymmetric Fano transmission characteristics in photonic crystal waveguide-cavity structures. The use of Fano resonances for optical switching is analyzed using temporal coupled mode theory in combination with three-dimensional finite difference time domain simulations taking into account the signal bandwidth. The results suggest a significant energy reduction by employing Fano resonances compared to more well established Lorentzian resonance structures. A specific example of a Kerr nonlinearity shows an order of magnitude energy reduction.
© 2013 Optical Society of America
Diffraction and Gratings
Original Manuscript: March 22, 2013
Revised Manuscript: May 21, 2013
Manuscript Accepted: May 22, 2013
Published: July 9, 2013
Mikkel Heuck, Philip Trøst Kristensen, Yuriy Elesin, and Jesper Mørk, "Improved switching using Fano resonances in photonic crystal structures," Opt. Lett. 38, 2466-2468 (2013)