title: Highly efficient multi-channel drop filter in a two-dimensional hetero photonic crystal.
abstract: An in-plane, multi-channel drop filter with high efficiency, in a two-dimensional photonic crystal (PC) slab, is experimentally demonstrated. Based on the concept of heterostructure photonic crystals proposed previously, the device consists of multiple simply connected, PC-based filter units, in which each unit has a structure proportional to an optimized basic unit and operates at a different wavelength. Four-channel drop operation was successfully obtained, with high efficiencies of almost 100%, and equal quality factors, across all channels.
authors.forename: Hitomichi
authors.initials: H
authors.lastname: Takano
authors.forename: Bong-Shik
authors.initials: BS
authors.lastname: Song
authors.forename: Takashi
authors.initials: T
authors.lastname: Asano
authors.forename: Susumu
authors.initials: S
authors.lastname: Noda