title: High speed optical phased array using high contrast grating all-pass filters.
abstract: We report a high speed 8x8 optical phased array using tunable 1550 nm all-pass filters with ultrathin high contrast gratings (HCGs) as the microelectromechanical-actuated top reflectors. The all-pass filter design enables a highly efficient phase tuning (1.7 π) with a small actuation voltage (10 V) and actuation displacement of the HCG (50 nm). The microelectromechanical HCG structure facilitates a high phase tuning speed >0.5 MHz. Beam steering is experimentally demonstrated with the optical phased array.
authors.forename: Weijian
authors.initials: W
authors.lastname: Yang
authors.forename: Tianbo
authors.initials: T
authors.lastname: Sun
authors.forename: Yi
authors.initials: Y
authors.lastname: Rao
authors.forename: Mischa
authors.initials: M
authors.lastname: Megens
authors.forename: Trevor
authors.initials: T
authors.lastname: Chan
authors.forename: Byung-Wook
authors.initials: BW
authors.lastname: Yoo
authors.forename: David A
authors.initials: DA
authors.lastname: Horsley
authors.forename: Ming C
authors.initials: MC
authors.lastname: Wu
authors.forename: Connie J
authors.initials: CJ
authors.lastname: Chang-Hasnain