Reduction of scattering loss of silicon slot waveguides by RCA smoothing |
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Authors: | Sun Haishan Chen Antao Abeysinghe Don Szep Attila Kim Richard S |
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Institution: | Applied Physics Laboratory, University of Washington, Seattle, Washington 98105, USA. |
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Abstract: | Because of stronger optical confinement density, silicon slot waveguides tend to have higher scattering loss than normal ridge waveguides with same sidewall roughness. A wet chemical process is found to be highly effective in reducing the surface roughness and scattering loss. A reduction in scattering loss by 10.2 dB/cm for TE and 8.5 dB/cm for TM polarizations has been achieved. |
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