title: Ultrasmall multi-channel resonant-tunneling filter using mode gap of width-tuned photonic-crystal waveguide.
abstract: We have devised an ultra-small multi-channel drop filter based on a two-port resonant tunneling system in a two-dimensional photonic crystal with a triangular air-hole lattice. This filter does not require careful consideration of the interference process to achieve a high dropping efficiency. First we develop three-port systems based on a two-port resonant tunneling filter. Next we devise a multi-port channel drop filter by cascading these three-port systems. In this paper, we demonstrate a ten-channel drop filter with an 18 mum device size by 2D-FDTD calculation, and a three-port resonant tunneling filter with 65+/- 20 % dropping efficiency by experiment.
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