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Design of a Tunable, Room Temperature, Continuous-Wave Terahertz Source and Detector Using Silicon Waveguides

Research Area: Nanophotonics Year: 2008
Type of Publication: Article Keywords: silicon photonics, optical polymer, difference frequency generation, three wave mixing, terahertz radiation
Authors: Baehr-Jones, Tom; Hochberg, Michael; Soref, R.; Scherer, Axel
Journal: Journal of the Optical Society of America B Volume: 25
Number: 2 Pages: 261-268
Month: February
We describe the design of a silicon-based source for radiation in the 0.5-14 THz regime. This new class of devices will permit continuously tunable, milliwatt scale, cw, room temperature operation, a substantial advance over currently available technologies. Our silicon terahertz generator consists of a silicon waveguide for near-infrared radiation, contained within a metal waveguide for terahertz radiation. A nonlinear polymer cladding permits two near-infrared lasers to mix, and through difference-frequency generation produces terahertz output. The small dimensions of the design greatly increase the optical fields, enhancing the nonlinear effect. The design can also be used to detect terahertz radiation.
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