3.8 Proceedings Paper

Surface Transfer Doping in Silicon Waveguides: A Cause of Optical Loss

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IEEE

Keywords

Silicon photonics; surface transfer doping; low-loss waveguides; high-speed modulators

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We show that undoped silicon waveguides may suffer of up to 1.8 dB/cm free-carrier absorption caused by improper surface passivation. This result opens new-perspectives for low-loss silicon photonics and high-speed gateless devices.

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