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A tunable universal terahertz filter using artificial dielectrics based on parallel-plate waveguides

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4 Author(s)
Mendis, R. ; Department of Electrical and Computer Engineering, Rice University, MS-366, 6100 Main Street, Houston, Texas 77005, USA ; Nag, Abhishek ; Chen, Frank ; Mittleman, D.M.

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.3495994 

Using parallel-plate waveguides (PPWGs) that mimic artificial dielectrics, we demonstrate a universal filter that provides low-pass, high-pass, band-pass, and band-stop (or notch) filtering functionalities in the terahertz (THz) frequency regime. The device essentially consists of two PPWGs in a complementary geometry. The filtering functionality is achieved by positioning an appropriate amplitude mask in the path of the spatially chirped THz beam between the two waveguides. By varying the position of the mask, we experimentally and theoretically demonstrate continuous tunability of the respective 3 dB cutoff frequencies within the frequency range from about 0.3 to 0.7 THz.

Published in:

Applied Physics Letters  (Volume:97 ,  Issue: 13 )

Date of Publication:

Sep 2010

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