title: Measured and simulated performance of a ceramic micromechanical beam steering device at 94 GHz.
abstract: We report the first experimental demonstration of a transmission-mode micromechanical beam steering device for use in standoff terahertz imaging and spectroscopy. The device was constructed by laminating laser-cut 96% alumina sheets to form two plates with interlocking rectangular gratings of 762 microm period and was characterized at 94 GHz in a free-space measurement setup with an automated elevation scan. Plate tilts as great as 6 degrees deflected the transmitted beam by 6 degrees for the transverse electric (TE) polarization and by 4 degrees for the transverse magnetic polarization. Finite-difference time-domain simulations of the TE performance were in good agreement with the measurements.
authors.affiliation: Department of Electronics and Electrical Engineering, University of Glasgow, Rankine Building, Oakfield Avenue, Glasgow G12 8LT, United Kingdom.
authors.forename: T D
authors.initials: TD
authors.lastname: Drysdale
authors.forename: E D
authors.initials: ED
authors.lastname: Walsby
authors.forename: D R S
authors.initials: DR
authors.lastname: Cumming