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arXiv · 1310.5756

Picosecond all-optical switching in hydrogenated amorphous silicon microring resonators

Jason S. Pelc·Kelley Rivoire·Sonny Vo·Charles Santori·David A. Fattal·Raymond G. Beausoleil
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Abstract

We utilize cross-phase modulation to observe all-optical switching in microring resonators fabricated with hydrogenated amorphous silicon (a-Si:H). Using 2.7-ps pulses from a mode-locked fiber laser in the telecom C-band, we observe optical switching of a cw telecom-band probe with full-width at half-maximum switching times of 14.8 ps, using approximately 720 fJ of energy deposited in the microring. In comparison with telecom-band optical switching in undoped crystalline silicon microrings, a-Si:H exhibits substantially higher switching speeds due to reduced impact of free-carrier processes.

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Jason S. Pelc, Kelley Rivoire, Sonny Vo, Charles Santori, David A. Fattal, Raymond G. Beausoleil. 2014-02-14. Picosecond all-optical switching in hydrogenated amorphous silicon microring resonators. https://doi.org/10.1364/oe.22.003797

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