title: Electronically controlled optical beam-steering by an active phased array of metallic nanoantennas.
abstract: An optical phased array of nanoantenna fabricated in a CMOS compatible silicon photonics process is presented. The optical phased array is fed by low loss silicon waveguides with integrated ohmic thermo-optic phase shifters capable of 2π phase shift with ∼ 15 mW of applied electrical power. By controlling the electrical power to the individual integrated phase shifters fixed wavelength steering of the beam emitted normal to the surface of the wafer of 8° is demonstrated for 1 × 8 phased arrays with periods of both 6 and 9 μm.
authors.affiliation: Sandia National Laboratories, PO Box 5800 Albuquerque, NM 87185, USA.
authors.forename: C T
authors.initials: CT
authors.lastname: DeRose
authors.forename: R D
authors.initials: RD
authors.lastname: Kekatpure
authors.forename: D C
authors.initials: DC
authors.lastname: Trotter
authors.forename: A
authors.initials: A
authors.lastname: Starbuck
authors.forename: J R
authors.initials: JR
authors.lastname: Wendt
authors.forename: A
authors.initials: A
authors.lastname: Yaacobi
authors.forename: M R
authors.initials: MR
authors.lastname: Watts
authors.forename: U
authors.initials: U
authors.lastname: Chettiar
authors.forename: N
authors.initials: N
authors.lastname: Engheta
authors.forename: P S
authors.initials: PS
authors.lastname: Davids
mesh_terms: D004574:Electromagnetic Fields; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000528:radiation effects; D012031:Refractometry / Q000295:instrumentation*; D012666:Semiconductors; D020349:Surface Plasmon Resonance / Q000295:instrumentation*