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Active terahertz quantum-cascade composite right/left-handed metamaterial
Authors
Amir A. Tavallaee
Benjamin S. Williams
+3 more
Philip W. C. Hon
Qi-Sheng Chen
Tatsuo Itoh
Publication date
14 January 2013
Publisher
'AIP Publishing'
Doi
Cite
Abstract
We report the demonstration of a composite right/left-handed (CRLH) metamaterial waveguide for terahertz quantum-cascade (QC) lasers. By incorporating gap capacitors (∼ 250 nm) in the top metallization of a metal-metal waveguide operating in a higher order lateral mode, we have realized a CRLH transmission line that supports traveling modes with negative effective phase indices (i.e., left-handed or backward-wave propagation). The CRLH metamaterial waveguide is employed as an active leaky-wave antenna for a terahertz QC-laser. Directional single-lobed beams launched in the backwards direction at angles of - 4 ° and - 63 ° were experimentally observed at excitation frequencies 2.59 and 2.48 THz, respectively. © 2013 American Institute of Physics
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info:doi/10.1063%2F1.4775666
Last time updated on 01/04/2019
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eScholarship - University of California
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Last time updated on 25/12/2021