Physical Review A

ac-Stark-effect-enhanced four-wave mixing in a near-resonant four-level system

Chen-Yu Tai, Robert T. Deck, Charles Kim

Published Jan 1, 1988• 7 citations

Abstract

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.

DOI: 10.1103/physreva.37.163

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Physical Review A

ac-Stark-effect-enhanced four-wave mixing in a near-resonant four-level system

Chen-Yu Tai, Robert T. Deck, Charles Kim

Published Jan 1, 1988• 7 citations

Publisher

Abstract

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.

DOI: 10.1103/physreva.37.163

Related papers

Observation of ac Stark-effect-enhanced four-wave mixing in a near-resonant four-level system

Chen-Yu Tai, Charles C. Kim, Robert T. Deck +1 more

Two laser beams at frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$ are used to produce nonlinear scattering (wave mixing) in ${\mathrm{I}}_{2}$ vapor at frequency 2${\ensuremath{\nu}}_{1}$+${\ensuremath{\nu}}_{2}$. The scattering results from near-resonant allowed transitions in ${\mathrm{I}}_{2}$ molecules and is observed to be anomalously strong when both laser beam frequencies are detuned in the same direction from frequencies corresponding to resonance in the free molecule. The strong scattering is interpreted in terms of a resonantly enhanced ac Stark shift caused by a configuration interaction between the ``dressed molecular levels.'' By tuning the two pulses simultaneously, a tuning range of approximately 2 A\r{} (50 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$) is achieved in the mixed wave. The scattering process should therefore have practical application in the efficient generation of tunable coherent radiation in the ultraviolet and vacuum-ultraviolet range of the spectrum. Some of the spectroscopic properties of the three-quantum state at E\ensuremath{\sim}53 000 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ are studied.Two laser beams at frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$ are used to produce nonlinear scattering (wave mixing) in ${\mathrm{I}}_{2}$ vapor at frequency 2${\ensuremath{\nu}}_{1}$+${\ensuremath{\nu}}_{2}$. The scattering results from near-resonant allowed transitions in ${\mathrm{I}}_{2}$ molecules and is observed to be anomalously strong when both laser beam frequencies are detuned in the same direction from frequencies corresponding to resonance in the free molecule. The strong scattering is interpreted in terms of a resonantly enhanced ac Stark shift caused by a configuration interaction between the ``dressed molecular levels.'' By tuning the two pulses simultaneously, a tuning range of approximately 2 A\r{} (50 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$) is achieved in the mixed wave. The scattering process should therefore have practical application in the efficient generation of tunable coherent radiation in the ultraviolet and vacuum-ultraviolet range of the spectrum. Some of the spectroscopic properties of the three-quantum state at E\ensuremath{\sim}53 000 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ are studied.

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IEEE Journal of Quantum ElectronicsOct 1, 198085 citations

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}

Two laser beams at frequencies ${\ensuremath{\nu}}_{1}$ and ${\ensuremath{\nu}}_{2}$ are used to produce nonlinear scattering (wave mixing) in

{\mathrm{I}}_{2}

vapor at frequency 2${\ensuremath{\nu}}_{1}$+${\ensuremath{\nu}}_{2}$. The scattering results from near-resonant allowed transitions in

{\mathrm{I}}_{2}

molecules and is observed to be anomalously strong when both laser beam frequencies are detuned in the same direction from frequencies corresponding to resonance in the free molecule. The strong scattering is interpreted in terms of a resonantly enhanced ac Stark shift caused by a configuration interaction between the ``dressed molecular levels.'' By tuning the two pulses simultaneously, a tuning range of approximately 2 A\r{} (50 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$) is achieved in the mixed wave. The scattering process should therefore have practical application in the efficient generation of tunable coherent radiation in the ultraviolet and vacuum-ultraviolet range of the spectrum. Some of the spectroscopic properties of the three-quantum state at E\ensuremath{\sim}53 000 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ are studied.