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  • Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2011
  • OSA Technical Digest (CD) (Optica Publishing Group, 2011),
  • paper OThV5
  • https://doi.org/10.1364/OFC.2011.OThV5

Fully CMOS Compatible Subwavelength Plasmonic Slot Waveguides for Si Electronic-Photonic Integrated Circuits

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Abstract

Subwavelength horizontal Al/SiO2/Si/SiO2/Al plasmonic slot waveguides with SiO2 width at each side of ~15 nm and Si width of ~136, ~87, and ~43 nm are fabricated on SOI substrates using fully CMOS compatible processes. The propagation losses at 1550 nm TE are ~1.01, ~1.31, and ~1.56 dB/µm, respectively, as measured by the standard cutback method. A simple taper coupler with length of ~0.3–1 µm provides a high coupling efficiency of ~66%–79% between the plasmonic slot waveguide and the standard Si dielectric waveguide. The plasmonic slot waveguide can achieve a direct 90o bend with a very low bending loss of ~0.2–0.4 dB. The propagation, coupling, and bending losses depend weakly on wavelength in the c-band. The results demonstrate the potential for seamless integration of functional plasmonic devices in existing Si electronic-photonic integrated circuits.

© 2011 Optical Society of America

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