Dispersion properties of photonic crystal waveguides with a low in-plane index contrast
نویسندگان
چکیده
We investigate dispersion properties of photonic crystal waveguides in a low-index material system. The modes above the light line, of a waveguide consisting of one row of missing holes (W1), exhibit high losses due to out-ofplane radiation. In contrast, the index-guided modes below the light line show moderate losses and we demonstrate both theoretically and experimentally that high dispersion is possible. Furthermore we investigate wider defect waveguides operated within the photonic band gap, where a mini-stopband with a very large suppression of transmission was found. The dispersion properties of these waveguides are discussed. 4 Author to whom any correspondence should be addressed. New Journal of Physics 8 (2006) 210 PII: S1367-2630(06)25693-3 1367-2630/06/010210+13$30.00 © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft 2 Institute of Physics DEUTSCHE PHYSIKALISCHE GESELLSCHAFT
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