title: Observation of resonantly enhanced sum-frequency generation involving sodium Rydberg states.
abstract: A large, dc-electric-field-induced nonlinear optical susceptibility is exploited to produce ultraviolet radiation in the range 2453-2476 A by the process of sum-frequency generation in sodium. The interaction is resonantly enhanced at the first intermediate level by the 3 (2)P(3/2) state and at the second intermediate level by a Rydberg state. Conversion efficiencies of 10(-5) have been obtained; improvement of this value by a factor of 10(3) should be possible.
authors.forename: D J
authors.initials: DJ
authors.lastname: Gauthier
authors.forename: J
authors.initials: J
authors.lastname: Krasinski
authors.forename: R W
authors.initials: RW
authors.lastname: Boyd