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Journal article

Optical modulation of terahertz pulses in a parallel plate waveguide

By Cooke, David1,2; Jepsen, Peter Uhd1,2

From

Teraherts Technologies and Biophotonics, Department of Photonics Engineering, Technical University of Denmark1

Department of Photonics Engineering, Technical University of Denmark2

In this work we present a technique for optically modulating a terahertz pulse inside a parallel plate waveguide. A novel semiconductor filled waveguide is formed by coating both sides of a thin, high resistivity silicon slab with a transparent conducting oxide. While the waveguide is intrinsically lossy due to the low conductivity of the oxides, it permits photoexcitation through the plates, generating free carriers within the silicon that modulates the terahertz pulse transmission.

We demonstrate this modulation by observing the Drude response of photoexcited carriers within the silicon in a narrow strip inside the waveguide.

Language: English
Year: 2008
Pages: 15123-15129
ISSN: 10944087
Types: Journal article
DOI: 10.1364/OE.16.015123
ORCIDs: Jepsen, Peter Uhd
Keywords

Computer Simulation Computer-Aided Design Equipment Design Equipment Failure Analysis Infrared Rays Microwaves Models, Theoretical Optics and Photonics Semiconductors Telecommunications

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