Abstract
We performed optical characterizations of optical delay lines based on photonic crystal waveguides. The delay lines were composed of cylindrical air holes in silicon-on-silicon-dioxide ridge waveguides, defects were periodically created by means of increasing the separation of two neighboring air holes, and the structure was designed to have flat-transmittance impurity band. We clearly observed an impurity band with a bandwidth of and a maximum transmittance of at an operating wavelength of . A 600-fs delay was confirmed with a -long delay line. A good agreement was confirmed between the experimental results and the calculations.
© 2002 Optical Society of America
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