title: Compact wavelength demultiplexing using focusing negative index photonic crystal superprisms.
abstract: Here, we demonstrate a compact photonic crystal wavelength demultiplexing device based on a diffraction compensation scheme with two orders of magnitude performance improvement over the conventional superprism structures reported to date. We show that the main problems of the conventional superprism-based wavelength demultiplexing devices can be overcome by combining the superprism effect with two other main properties of photonic crystals, i.e., negative diffraction and negative refraction. Here, a 4-channel optical demultiplexer with a channel spacing of 8 nm and cross-talk level of better than -6.5 dB is experimentally demonstrated using a 4500 microm(2) photonic crystal region.
authors.forename: Babak
authors.initials: B
authors.lastname: Momeni
authors.forename: Jiandong
authors.initials: J
authors.lastname: Huang
authors.forename: Mohammad
authors.initials: M
authors.lastname: Soltani
authors.forename: Murtaza
authors.initials: M
authors.lastname: Askari
authors.forename: Saeed
authors.initials: S
authors.lastname: Mohammadi
authors.forename: Mohammad
authors.initials: M
authors.lastname: Rakhshandehroo
authors.forename: Ali
authors.initials: A
authors.lastname: Adibi