Dr. Mayer A. Landau Profile

Dr. Mayer A. Landau

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Proceedings Article | 5 October 2015 Presentation

Two layer metamaterials for selective frequency transmission in the terahertz region (Presentation Recording)

Mayer Landau

Proceedings Volume 9544, 95442Q (2015) https://doi.org/10.1117/12.2188966

KEYWORDS: Metamaterials, Gold, Tunable filters, Silicon, Semiconducting wafers, Split ring resonators, Switches, Video, Current controlled current source

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We have fabricated a metamaterial tunable filter for dynamic frequency selection in the terahertz region. The metamaterial consists of a sandwich of two meta-surfaces grown on high resistivity silicon wafers. The first meta-surface consists of a two-dimensional array of gold double split ring resonators and the second meta-surface consisits of an array of gold cut rods. Both meta-surfaces are fabricated for a response in the terahertz region. Our terahertz pulses are produced using the standard Austin switch technique. The terahertz pulse is focused onto the two meta-surfaces which are sandwiched together to produce a transmission window. Together, with the right orientation, translation, and parallelism of the two meta-surfaces, we achieve filtering of terahertz pulses. Since the unit cells for the inclusions are on the order of 100 microns, control of the translation, orientation, and parallelism of the two meta-surfaces with respect to each other and with respect to the orientation and direction of the impinging terahertz field is a challenge. We describe our technique for doing this and present data on our frequency filtering in the terahertz.

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