title: High-Q coupled resonances on a PhC waveguide using a tapered nanofiber with high coupling efficiency.
abstract: We experimentally demonstrate high-Q cavity formation at an arbitrary position on a silicon photonic crystal waveguide by bringing a tapered nanofiber into contact with the surface of the slab. An ultrahigh Q of 5.1 × 10(5) is obtained with a coupling efficiency of 39%, whose resonant wavelength can be finely tuned by 27 pm by adjusting the contact length of the nanofiber. We also demonstrate an extremely high coupling efficiency of 99.6% with a loaded Q of 6.1 × 10(3). We show that we can obtain a coupled resonances, which has the potential to be used for slow light generation.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Tetsumoto
authors.forename: Yuta
authors.initials: Y
authors.lastname: Ooka
authors.forename: Tanabe
authors.initials: T
authors.lastname: Takasumi