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Design and Fabrication of Segmented, Slotted Waveguides for Electro-Optic Modulation

Research Area: Nanophotonics Year: 2007
Type of Publication: Article Keywords: electrical contacts, electro-optical modulation, integrated optics, optical losses, optical waveguides, silicon
Authors: Wang, Guangxi; Baehr-Jones, Tom; Hochberg, Michael; Scherer, Axel
Journal: Applied Physics Letters Volume: 91
Number: 14 Pages: 143109
Month: October
Recently, slotted waveguides have been used in conjunction with second order nonlinear optical polymers to provide a platform for electro-optic modulation at telecommunication frequencies. A challenge with these devices is the need to provide high-frequency electrical driving signals to the slots. The silicon resistivity must be high to reduce optical loss, and as a result electrical performance can be severely limited. We have designed and fabricated a class of waveguide that achieves quasicontinuous electrical contact with subwavelength segmentations and has low optical losses of 4 dB/cm, allowing both millimeter-wave and optical fields to be concentrated in the same area.
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