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 period and was characterized at in a free-space measurement setup with an automated elevation scan. Plate tilts as great as deflected the transmitted beam by for the transverse electric (TE) polarization and by for the transverse magnetic polarization. Finite-difference time-domain simulations of the TE performance were in good agreement with the measurements.
© 2008 Optical Society of America
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