title: Beam control and multi-color routing with spatial photonic defect modes.
abstract: We demonstrate tunable re-directing, blocking, and splitting of a light beam along defect channels based on spatial bandgap guidance in two-dimensional photonic lattices. We show the possibility for linear control of beam propagation and multicolor routing with specially designed junctions and surface structures embedded in otherwise uniform square lattices.
authors.affiliation: Department of Physics and Astronomy, San Francisco State University, San Francisco, California 94132, USA.
authors.forename: Xiaosheng
authors.initials: X
authors.lastname: Wang
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Chen