Theory of deep ultraviolet generation at maximum coherence assisted by Stark-chirped two-photon resonance

Details Theory of deep ultraviolet generation at maximum coherence assisted by Stark-chirped two-photon resonance Theory of deep ultraviolet generation at maximum coherence assisted by Stark-chirped two-photon resonance

2003-01-29

arxiv.org/abs/quant-ph/0301158v1

A chapter in Modern Topics in Chemical Physics, ed. by T.F.George, X.Sun and G.P.Zhang, Research Signpost, Trivandrum, India,

Physics

Quantum Physics

26 pages, 20 figures

Scientific paper

A scheme is analyzed for effcient generation of vacuum ultraviolet radiation through four-wave mixing processes assisted by the technique of Stark-chirped rapid adiabatic passage. These opportunities are associated with pulse excitation of laddertype short-wavelength two-photon atomic or molecular transitions so that relaxation processes can be neglected. In this three-laser technique, a delayed-pulse of strong oR-resonant infrared radiation sweeps the laser-induced Stark-shift of a two-photon transition in a such way that facilitates robust maximum two-photon coherence induced by the first ultraviolet laser. A judiciously delayed third pulse scatters at this coherence and generates short-wavelength radiation. A theoretical analysis of these problems based on the density matrix is performed. A numerical model is developed to carry out simulations of a typical experiment. The results illustrate a behavior of populations, coherence and generated radiation along the medium as well as opportunities of effcient generation of deep (vacuum) ultraviolet radiation.

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