title: High finesse microfiber knot resonators made from double-ended tapered fibers.
abstract: We fabricated optical microfiber knot resonators from thin tapered fibers (diameter down to 1 μm) linked to untapered fiber at both ends. We demonstrated a finesse of about 100, over twice as high as previously reported for microfiber resonators. Low-loss encapsulation of microfiber knot resonators in hydrophobic silica aerogel was also investigated.
authors.affiliation: Department of Physics, University of Bath, Bath BA2 7AY, United Kingdom.
authors.forename: Limin
authors.initials: L
authors.lastname: Xiao
authors.forename: T A
authors.initials: TA
authors.lastname: Birks