title: Ultrasmall multi-port channel drop filter in two-dimensional photonic crystal on silicon-on-insulator substrate.
abstract: We demonstrate ultrasmall five-port channel drop filters (CDFs) based on a two-dimensional photonic crystal slab. We combine seven photonic crystals with different lattice constants and use light reflections at the different photonic crystal boundaries to control the interference process and achieve a high dropping efficiency. We operate the CDFs in two modes; one requires careful control of the interference process, whereas the other does not. The former can output a narrower signal spectrum than the latter, and CDF design is easier with the latter. Both CDFs achieve a high dropping efficiency and can function in the CL-band.
authors.forename: Akihiko
authors.initials: A
authors.lastname: Shinya
authors.forename: Satoshi
authors.initials: S
authors.lastname: Mitsugi
authors.forename: Eiichi
authors.initials: E
authors.lastname: Kuramochi
authors.forename: Masaya
authors.initials: M
authors.lastname: Notomi