@article{oai:tsukuba.repo.nii.ac.jp:00027618,
 author = {伊藤, 雅英 and Sugisaka, Jun-ichiro and Yamamoto, Noritsugu and Okano, Makoto and Komori, Kazuhiro and Itoh, Masahide},
 issue = {7},
 journal = {Journal of the Optical Society of America. B},
 month = {Jul},
 note = {The aim of this work is to enhance the Q value of a photonic crystal microring resonator that can be used to buffer optical signals (in a pulse train). A conventional photonic crystal microring resonator having 60° bends exhibits poor confinement of light due to the radiation losses at the bending points. Hence, we replaced conventional bent waveguides with circularly curved ones. The Q value of the resulting ring resonator is measured, and we demonstrate, as an example, an eightfold enhancement of the Q value at a wavelength of 1340 nm. Finally, we also estimate the Q value of a ring waveguide that excludes the optical coupling between the input/output waveguides, showing that the replacement of a sharply bent waveguide by a curved one increases the Q value by up to 5.2 times at a wavelength of 1340 nm.},
 pages = {1599--1605},
 title = {Enhancement of the Q value of a microring resonator by introducing curved photonic crystal waveguides},
 volume = {29},
 year = {2012}
}