The nature of guided modes and defect modes in periodic dielectric waveguides is investigated computationally for model systems in two dimensions. It is shown that defect states that exist within the band gap of guided modes can be excited to form tightly localized high-<i>Q</i> resonances.
© 1995 Optical Society of America
Shanhui Fan, J. D. Joannopoulos, Joshua N. Winn, Adrian Devenyi, J. C. Chen, and Robert D. Meade, "Guided and defect modes in periodic dielectric waveguides," J. Opt. Soc. Am. B 12, 1267-1272 (1995)