Based on two-dimensional photonic crystals with a triangular lattice, a channel drop filter with a wavelength-selective reflection microcavity is designed. In the structure, two microcavities are used. One is used for a resonant tunneling-based channel drop operation. The other is used to realize wavelength-selective reflection feedback in the bus waveguide. The phase term, which is derived by means of coupled-mode theory to achieve close to 100% drop efficiency, is satisfied by modifying the sizes of the border air holes next to the bus waveguide section between the two cavities. Using the finite-difference time-domain method, the simulation results show complete power transfer between the bus and drop waveguides via the system.
© 2007 Optical Society of America
(250.5300) Optoelectronics : Photonic integrated circuits
Original Manuscript: October 31, 2006
Manuscript Accepted: April 7, 2007
Published: July 23, 2007
Photonic Metamaterials (2007) JOSA A
Hongliang Ren, Chun Jiang, Weisheng Hu, Mingyi Gao, Yang Qu, and Fanghua Wang, "Channel drop filter in two-dimensional triangular lattice photonic crystals," J. Opt. Soc. Am. A 24, A7-A11 (2007)