title: Ultracompact resonant filters in photonic crystals.
abstract: A novel design for an ultracompact, high-Q notch-rejection filter is presented, and an analytic expression for the transmission properties is derived. This folded directional coupler shares the properties of a Fabry-Perot resonator and a directional coupler. We compare and contrast the device to high-Q Fabry-Perot cavities in photonic crystal waveguides.
authors.affiliation: Centre for Ultrahigh-Bandwidth Devices for Optical Systems, School of Physics, University of Sydney, Sydney, NSW 2006, Australia. twhite@physics.usyd.edu.au
authors.forename: T P
authors.initials: TP
authors.lastname: White
authors.forename: L C
authors.initials: LC
authors.lastname: Botten
authors.forename: R C
authors.initials: RC
authors.lastname: McPhedran
authors.forename: C Martijn
authors.initials: CM
authors.lastname: de Sterke