title: Photonic band gap filter for wavelength division multiplexer.
abstract: An optical multiplexer-demultiplexer based on an index-confined photonic band gap waveguide is proposed. The dropping of electromagnetic waves having a given frequency or a certain frequency band is obtained via a phase-shifted grating obtained by breaking the uniform period sequence to include a defect layer. The selective filtering properties of the proposed structure are simulated by means of a computer code relying on a bi-directional beam propagation method based on the method of lines.
authors.forename: A
authors.initials: A
authors.lastname: D'Orazio
authors.forename: M
authors.initials: M
authors.lastname: De Sario
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Petruzzelli
authors.forename: F
authors.initials: F
authors.lastname: Prudenzano