title: Frequency metrology by use of quantum interference.
abstract: Quantum interference in the rate of two-photon excitation of the 6S((1/2)) ?6P(3/2) ? 6D(5/2) transition in atomic cesium is exploited to demonstrate phase-sensitive frequency demodulation for an optical interval of +/- 12.5 THz. By thus using atoms as ultrafast nonlinear mixing elements, we suggest and analyze a new avenue for absolute comparisons of a dense set of frequencies over the range of 200-2000 nm.
authors.forename: N P
authors.initials: NP
authors.lastname: Georgiades
authors.forename: E S
authors.initials: ES
authors.lastname: Polzik
authors.forename: H J
authors.initials: HJ
authors.lastname: Kimble