title: On-demand ultrahigh-Q cavity formation and photon pinning via dynamic waveguide tuning.
abstract: We show that ultrahigh-Q wavelength-sized cavities can be reconfigurably formed by local refractive index tuning of photonic-crystal mode-gap waveguides. We have found that Q can be extraordinarily high (approximately 5 x 10(9)), which is much higher than that of structure-modulated mode-gap cavities. Furthermore, the required index modulation is extremely small (Deltan/n approximately 10(-3)), which enables dynamic cavity formation by fast optical nonlinearity. We numerically show that traveling photons in a waveguide can be pinned by fast local index tuning.
authors: NTT Basic Research Laboratories, NTT Corporation, Atsugi, Japan. notomi@nttbrl.jp
authors: Masaya
authors: M
authors: Notomi
authors: Hideaki
authors: H
authors: Taniyama
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008962:Models, Theoretical; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014159:Transducers