We report experimental measurements of slow light in Comb Photonic Crystal Waveguides (CPCW). The tailoring of
the slot into a comb allows performing dispersion engineering in order to achieve slow light regime, and efficient tapers
allow a high coupling efficiency. We also investigate the losses with cut-back measurements and show that losses are
comparable with those of a standard W1 Photonic Crystal Waveguide, whereas the nonlinear effective area is strongly
reduced. This type of waveguide offers opportunities to realize compact devices with an ultra-high light confinement for
achieving optical nonlinearities with a low index material.
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Charles Caer ; Xavier Le Roux and Eric Cassan
Engineered slot-comb photonic crystal waveguides
", Proc. SPIE 8564, Nanophotonics and Micro/Nano Optics, 85640M (November 20, 2012); doi:10.1117/12.2001080; http://dx.doi.org/10.1117/12.2001080