ac-Stark-effect-enhanced four-wave mixing in a near-resonant four-level system
Chen-Yu Tai, Robert T. Deck, Charles Kim
We report on an ac-Stark-effect-enhanced wave-mixing experiment in ${\mathrm{I}}_{2}$ vapor in which an output uv signal at frequency 2${\ensuremath{\omega}}_{1}$+${\ensuremath{\omega}}_{2}$ is maximized when the input frequencies ${\ensuremath{\omega}}_{1}$ and ${\ensuremath{\omega}}_{2}$ are both detuned in the same direction from the resonance frequencies of the free molecule. A theory based on a configuration interaction between the ``dressed molecular levels'' is presented to explain the strong enhancement of the uv signal under these conditions. The data presented demonstrate that tunable coherent radiation at ultraviolet and vacuum-ultraviolet frequencies can be generated by the wave-mixing process we describe.
Physical Review A•Jan 1, 1988•7 citations