Journal
IEEE PHOTONICS JOURNAL
Volume 2, Issue 3, Pages 404-414Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2010.2047918
Keywords
Engineered photonic nanostructures; ultrafast nonlinear processes; nonlinear effects; slow light; silicon nanophotonics; photonic crystals
Funding
- European Union
- UK EPSRC
- NWO
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We use slow-light photonic crystals to enhance optical switching and modulation in silicon. By using dispersion-engineered designs, a switch as short as 5 mu m was achieved, in which we have demonstrated rerouting of optical pulses on a 3-ps time scale through the absorption of a femtosecond pulse. We additionally demonstrate a modulator with a Mach-Zehnder interferometer (MZI) configuration with flat-band slow-light photonic crystal phase shifters that is designed to give a large group-index-bandwidth product. An extinction ratio in excess of 15 dB is obtained over the entire 11-nm bandwidth of the modulator.
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