CST – Computer Simulation Technology

Bendings and Filters with Single Strip THz Plasmonic Waveguides
Tahsin Akalin, Emilien Peytavit, Jean-François Lampin
Joint 32nd International Conference on Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz.
2-9 Sept. 2007
75 - 76
Bendings, Filter, Plasmonic, Terahertz
In this communication, we present measurement results on THz Planar Strip Plasmonic (THz-PSP) structures based on Planar Goubau Lines (PGL). The first part will be dedicated to the study of bendings (90° for example) and the second one to filters fabricated with a corrugated PGL. We demonstrate low loss bendings with highly confined electromagnetic waves. For the second part two different topologies are studied: the first one corresponds to a periodical corrugation of the Goubau line section which is a single metallic strip conductor and in the second case we place gaps in this conductor which is in this configuration formed by finite sized metallic strips. In both case we have a rejected frequency band controlled by some geometrical parameters. We will also give the role of the main geometrical parameters on the transmission and reflection coefficients. In the structure with equally spaced gaps, we have also a relatively high transmission parameter. We will present results obtained as well with electromagnetic simulation tools than with Vectorial Network Analyser (VNA) measurements up to 220GHz. Potential applications, like focusing effects and THz plasmonic metamaterial behaviour, with these structures will also be discussed.

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