Ultrafast photodetection in an all-silicon chip enabled by two-photon absorption

Bravo-Abad, J.; Ippen, E. P.; Soljačić, M.
June 2009
Applied Physics Letters;6/15/2009, Vol. 94 Issue 24, p241103
Academic Journal
In this letter we theoretically demonstrate that by dramatically enhancing two-photon absorption, all-silicon optical microresonators can act as efficient photodetectors for light at telecom wavelengths. We illustrate this approach with two specific designs based on a ring resonator and a photonic crystal cavity. The proposed scheme is fully compatible with standard silicon complementary metal-oxide-semiconductor processing technology, and thus, could contribute to the development of chip-scale integrated photodetectors based exclusively on silicon.


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