title: Photonic-chip-based tunable slow and fast light via stimulated Brillouin scattering.
abstract: We report the first (to our knowledge) demonstration of photonic chip based tunable slow and fast light via stimulated Brillouin scattering. Slow, fast, and negative group velocities were observed in a 7 cm long chalcogenide (As(2)S(3)) rib waveguide with a group index change ranging from ~-44 to +130, which results in a maximum delay of ~23 ns at a relatively low gain of ~23 dB. Demonstration of large tunable delays in a chip scale device opens up applications such as frequency sensing and true-time delay for a phased array antenna, where integration and delays ~10 ns are highly desirable.
authors.affiliation: Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), Institute of Photonics and Optical Science, School of Physics, The University of Sydney, New South Wales 2006, Australia. rpant@physics.usyd.edu.au
authors.forename: Ravi
authors.initials: R
authors.lastname: Pant
authors.forename: Adam
authors.initials: A
authors.lastname: Byrnes
authors.forename: Christopher G
authors.initials: CG
authors.lastname: Poulton
authors.forename: Enbang
authors.initials: E
authors.lastname: Li
authors.forename: Duk-Yong
authors.initials: DY
authors.lastname: Choi
authors.forename: Steve
authors.initials: S
authors.lastname: Madden
authors.forename: Barry
authors.initials: B
authors.lastname: Luther-Davies
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Eggleton