title: Frequency tuning of the whispering-gallery modes of silica microspheres for cavity quantum electrodynamics and spectroscopy.
abstract: We have tuned the whispering-gallery modes of a fused-silica microresonator over nearly 1 nm at 800 nm, i.e., over half a free spectral range, or 10(6) linewidths of the resonator. This result has been achieved by use of a new method based on the stretching of a two-stem microsphere. We describe devices that will permit new cavity QED experiments with this high- Q optical resonator when it is desirable to optimize its coupling to emitters with given transition frequencies. The demonstrated tuning capability is compatible with both UHV and low-temperature operation, which should be useful for future experiments with laser-cooled atoms or single quantum dots.
authors.forename: W
authors.initials: W
authors.lastname: von Klitzing
authors.forename: R
authors.initials: R
authors.lastname: Long
authors.forename: V S
authors.initials: VS
authors.lastname: Ilchenko
authors.forename: J
authors.initials: J
authors.lastname: Hare
authors.forename: V
authors.initials: V
authors.lastname: Lefèvre-Seguin