| Publication No: 2649 | Search all ORC publications |
Separation of photonic crystal waveguides modes using femtosecond time-of-flight
M.C.Netti, C.E.Finlayson, and J.J.Baumberg
Department of Physics and Astronomy, University of Southampton, UK
M.D.B.Charlton, M.E.Zoorob, J.S.Wilkinson* and G.J.Parker
Mesophotonics Ltd., Chilworth Science Park, Southampton, UK
* also with Dept Electronics and Computer Science, University of Southampton, UK
Abstract
We demonstrate that ultrabroadband ultrashort-pulse white light supercontina can be used to track the group velocity of photons in optical waveguides using a Kerr gate technique. Results on silicon nitride slab waveguides show both polarization birefringence and multimode dispersion, which vanish at critical wavelengths. When photonic crystals are embedded in the waveguides, the higher order modes are excited within the band-gap region, demonstrating the need to control their dispersion to make effective use of photonic crystal waveguide devices.
Applied Physics Letters (2002) Vol.81(21) pp.3927-3929
doi: 10.1063/1.1520709
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Copyright University of Southampton 2006