title: Ultrahigh-Q photonic crystal nanocavities in wide optical telecommunication bands.
abstract: We have studied the feasibility of extending the operating wavelength range of high-Q silicon nanocavities above and below the 1.55 μm wavelength band, while maintaining Q factors of more than one million. We have succeeded in developing such nanocavities in the optical telecommunication bands from 1.27 μm to 1.50 μm. Very high Q values of more than two million were obtained even for the 1.30 μm band. The Q values increase proportionally to the resonant wavelength because the scattering loss decreases. We have also analyzed the influence of absorption due to surface water. We conclude that high-Q nanocavities are feasible for an even wider wavelength region including parts of the mid-infrared.
authors.affiliation: Nanoscience and Nanotechnology Research Center, Research Organization for the 21st Century, Osaka Prefecture University, Sakai, Osaka 599-8570, Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Terawaki
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Takahashi
authors.forename: Masahiro
authors.initials: M
authors.lastname: Chihara
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Inui
authors.forename: Susumu
authors.initials: S
authors.lastname: Noda
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005240:Feasibility Studies; D036103:Nanotechnology / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*