Mode interference and radiation leakage in a tapered parallel plate waveguide for terahertz waves

R. Mueckstein; Miguel Navarro-Cia; O. Mitrofanov

doi:10.1063/1.4800772

Mode interference and radiation leakage in a tapered parallel plate waveguide for terahertz waves

R. Mueckstein^*, Miguel Navarro-Cia, O. Mitrofanov

^*Corresponding author for this work

Engineering and Physical Sciences

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

144 Downloads (Pure)

Abstract

To exploit tapered parallel plate waveguides for broadband terahertz (THz) spectroscopy, the impact of the waveguide geometry on transmission of terahertz pulses is investigated experimentally. We find that the approximation of single transverse electro-magnetic mode propagation is insufficient for describing the observed behavior. The TE₀₂ mode plays a particularly important role. The mode composition, however, can be controlled by the gap between the waveguide plates, which affects the main loss mechanism, radiation leakage, and group velocity for the TE₀₂ mode. Balancing the waveguide loss and coupling efficiencies results in an optimal gap for the tapered waveguide.

Original language	English
Article number	141103
Journal	Applied Physics Letters
Volume	102
Issue number	14
DOIs	https://doi.org/10.1063/1.4800772
Publication status	Published - 8 Apr 2013

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Mueckstein_et_al_Mode_interference_Applied_Physics_Letters_2013
Copyright (2013) AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Mueckstein, R., M. Navarro-Cía, and O. Mitrofanov. "Mode interference and radiation leakage in a tapered parallel plate waveguide for terahertz waves." Applied Physics Letters 102.14 (2013): 141103 and may be found at http://dx.doi.org/10.1063/1.4800772 Checked Jan 2016
Final published version, 1.32 MBLicence: None: All rights reserved

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abstract = "To exploit tapered parallel plate waveguides for broadband terahertz (THz) spectroscopy, the impact of the waveguide geometry on transmission of terahertz pulses is investigated experimentally. We find that the approximation of single transverse electro-magnetic mode propagation is insufficient for describing the observed behavior. The TE02 mode plays a particularly important role. The mode composition, however, can be controlled by the gap between the waveguide plates, which affects the main loss mechanism, radiation leakage, and group velocity for the TE02 mode. Balancing the waveguide loss and coupling efficiencies results in an optimal gap for the tapered waveguide.",

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AB - To exploit tapered parallel plate waveguides for broadband terahertz (THz) spectroscopy, the impact of the waveguide geometry on transmission of terahertz pulses is investigated experimentally. We find that the approximation of single transverse electro-magnetic mode propagation is insufficient for describing the observed behavior. The TE02 mode plays a particularly important role. The mode composition, however, can be controlled by the gap between the waveguide plates, which affects the main loss mechanism, radiation leakage, and group velocity for the TE02 mode. Balancing the waveguide loss and coupling efficiencies results in an optimal gap for the tapered waveguide.

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Mode interference and radiation leakage in a tapered parallel plate waveguide for terahertz waves

Abstract

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