Journal
OPTICS EXPRESS
Volume 22, Issue 4, Pages 3797-3810Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.003797
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Funding
- Space and Naval Warfare Systems Center Pacific
- Defense Advanced Research Projects Agency [N66001-12-2-4007]
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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. (C) 2014 Optical Society of America
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