The high precision two-photon excitation measurements for 5S 1/2 ( F g = 2) to 5D 5/2 ( F e = 4 to 1) of 87 Rb are performed by using an optical frequency comb. The two counter-propagating femtosecond pulses (5S 1/2 → 5P 3/2 at 780 nm, and 5P 3/2 → 5D 5/2 at 776 nm) act on 87 Rb vapor, and the Doppler broadened background signal is effectively eliminated. The temperature and power dependences of the two-photon spectrum are studied in this paper.

Chinese Physics BJun 1, 20156 citations

Quantum Electronics and Laser Science Conference

Precision measurement of the 5s-5p-5d two-photon, two-color, polarization spectrum in atomic Rb

Bayram, Havey, Rosu, Sieradzan

Published Jan 1, 2000• 0 citations

OpenAlex

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S. B. Bayram, Mark D. Havey, M. Roşu +1 more

Summary form only given. A number of sophisticated techniques have been applied to precise measurements of the strength of resonance transitions in heavier alkali atoms. These include refined lifetime measurements in atomic beams, photoassociative spectroscopy of cold atoms confined to atomic traps, and direct measurements of the natural width of an atomic transition. We have made a precise study of the 5s-5p-5d transition in atomic Rb. Measurements of the non-resonant two-photon, two-color linear depolarization spectrum show remarkable polarization-dependent interference structure. Using this novel approach, it was possible to extract the ratio of the transition matrix elements for the two contributing pathways.Summary form only given. A number of sophisticated techniques have been applied to precise measurements of the strength of resonance transitions in heavier alkali atoms. These include refined lifetime measurements in atomic beams, photoassociative spectroscopy of cold atoms confined to atomic traps, and direct measurements of the natural width of an atomic transition. We have made a precise study of the 5s-5p-5d transition in atomic Rb. Measurements of the non-resonant two-photon, two-color linear depolarization spectrum show remarkable polarization-dependent interference structure. Using this novel approach, it was possible to extract the ratio of the transition matrix elements for the two contributing pathways.

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Precision measurement of the 5st2 S1/2 → 5pt2 Pj → 8st2 S1/2 two-photon, two-color polarization spectrum in atomic Rb

A. I. Beger, Mark D. Havey, Rodney P. Meyer

Precision measurements on the 5s ${\mathrm{}}^{2}$ ${\mathrm{S}}_{1\mathrm{/}2}$ \ensuremath{\rightarrow}5p ${\mathrm{}}^{2}$ ${\mathrm{P}}_{\mathrm{j}}$ \ensuremath{\rightarrow}8s ${\mathrm{}}^{2}$ ${\mathrm{S}}_{1\mathrm{/}2}$ two-photon, two-color polarization spectrum in atomic Rb are reported. As a result of interference between the transition amplitudes for the process, the spectrum is strongly frequency and linear polarization dependent in the vicinity of the 5s ${\mathrm{}}^{2}$ ${\mathrm{S}}_{1\mathrm{/}2}$ \ensuremath{\rightarrow}5p ${\mathrm{}}^{2}$ ${\mathrm{P}}_{1\mathrm{/}2}$ and 5s ${\mathrm{}}^{2}$ ${\mathrm{S}}_{1\mathrm{/}2}$ \ensuremath{\rightarrow}5p ${\mathrm{}}^{2}$ ${\mathrm{P}}_{3\mathrm{/}2}$ resonance transitions, with the linear polarization degree varying from nearly +100% to -100% over the approximate 500-${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ range of the data. For absorption of two collinearly polarized photons, complete destructive interference for the process occurs at a critical detuning from the 5s ${\mathrm{}}^{2}$ ${\mathrm{S}}_{1\mathrm{/}2}$ \ensuremath{\rightarrow}5p ${\mathrm{}}^{2}$ ${\mathrm{P}}_{3\mathrm{/}2}$ resonance transition given by ${\mathrm{\ensuremath{\Delta}}}_{\mathrm{c}}$=-155.83(3) ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$. The location of ${\mathrm{\ensuremath{\Delta}}}_{\mathrm{c}}$ is determined primarily by the relative transition matrix elements through the 5p ${\mathrm{}}^{2}$ ${\mathrm{P}}_{\mathrm{j}}$ multiplet, but also depends significantly on contributions from more energetic np ${\mathrm{}}^{2}$ P levels. The null in the excitation occurring at the critical frequency allows experimental determination of a type of sum rule that depends only on the atomic matrix elements and the value of ${\mathrm{\ensuremath{\Delta}}}_{\mathrm{c}}$. Such sum rules are defined and presented for the present experiment in Rb and for a recent similar experiment in Na.Precision measurements on the 5s${\mathrm{}}^{2}$${\mathrm{S}}_{1\mathrm{/}2}$\ensuremath{\rightarrow}5p${\mathrm{}}^{2}$${\mathrm{P}}_{\mathrm{j}}$\ensuremath{\rightarrow}8s${\mathrm{}}^{2}$${\mathrm{S}}_{1\mathrm{/}2}$ two-photon, two-color polarization spectrum in atomic Rb are reported. As a result of interference between the transition amplitudes for the process, the spectrum is strongly frequency and linear polarization dependent in the vicinity of the 5s${\mathrm{}}^{2}$${\mathrm{S}}_{1\mathrm{/}2}$\ensuremath{\rightarrow}5p${\mathrm{}}^{2}$${\mathrm{P}}_{1\mathrm{/}2}$ and 5s${\mathrm{}}^{2}$${\mathrm{S}}_{1\mathrm{/}2}$\ensuremath{\rightarrow}5p${\mathrm{}}^{2}$${\mathrm{P}}_{3\mathrm{/}2}$ resonance transitions, with the linear polarization degree varying from nearly +100% to -100% over the approximate 500-${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ range of the data. For absorption of two collinearly polarized photons, complete destructive interference for the process occurs at a critical detuning from the 5s${\mathrm{}}^{2}$${\mathrm{S}}_{1\mathrm{/}2}$\ensuremath{\rightarrow}5p${\mathrm{}}^{2}$${\mathrm{P}}_{3\mathrm{/}2}$ resonance transition given by ${\mathrm{\ensuremath{\Delta}}}_{\mathrm{c}}$=-155.83(3) ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$. The location of ${\mathrm{\ensuremath{\Delta}}}_{\mathrm{c}}$ is determined primarily by the relative transition matrix elements through the 5p${\mathrm{}}^{2}$${\mathrm{P}}_{\mathrm{j}}$ multiplet, but also depends significantly on contributions from more energetic np${\mathrm{}}^{2}$P levels. The null in the excitation occurring at the critical frequency allows experimental determination of a type of sum rule that depends only on the atomic matrix elements and the value of ${\mathrm{\ensuremath{\Delta}}}_{\mathrm{c}}$. Such sum rules are defined and presented for the present experiment in Rb and for a recent similar experiment in Na.

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Precision measurements on the 5s

{\mathrm{}}^{2}

{\mathrm{S}}_{1\mathrm{/}2}

\ensuremath{\rightarrow}5p

{\mathrm{}}^{2}

{\mathrm{P}}_{\mathrm{j}}

\ensuremath{\rightarrow}8s

{\mathrm{}}^{2}

{\mathrm{S}}_{1\mathrm{/}2}

two-photon, two-color polarization spectrum in atomic Rb are reported. As a result of interference between the transition amplitudes for the process, the spectrum is strongly frequency and linear polarization dependent in the vicinity of the 5s

{\mathrm{}}^{2}

{\mathrm{S}}_{1\mathrm{/}2}

\ensuremath{\rightarrow}5p

{\mathrm{}}^{2}

{\mathrm{P}}_{1\mathrm{/}2}

and 5s

{\mathrm{}}^{2}

{\mathrm{S}}_{1\mathrm{/}2}

\ensuremath{\rightarrow}5p

{\mathrm{}}^{2}

{\mathrm{P}}_{3\mathrm{/}2}

resonance transitions, with the linear polarization degree varying from nearly +100% to -100% over the approximate 500-${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$ range of the data. For absorption of two collinearly polarized photons, complete destructive interference for the process occurs at a critical detuning from the 5s

{\mathrm{}}^{2}

{\mathrm{S}}_{1\mathrm{/}2}

\ensuremath{\rightarrow}5p

{\mathrm{}}^{2}

{\mathrm{P}}_{3\mathrm{/}2}

resonance transition given by ${\mathrm{\ensuremath{\Delta}}}_{\mathrm{c}}$=-155.83(3) ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$. The location of ${\mathrm{\ensuremath{\Delta}}}_{\mathrm{c}}$ is determined primarily by the relative transition matrix elements through the 5p

{\mathrm{}}^{2}

{\mathrm{P}}_{\mathrm{j}}

multiplet, but also depends significantly on contributions from more energetic np

{\mathrm{}}^{2}

P levels. The null in the excitation occurring at the critical frequency allows experimental determination of a type of sum rule that depends only on the atomic matrix elements and the value of ${\mathrm{\ensuremath{\Delta}}}_{\mathrm{c}}$. Such sum rules are defined and presented for the present experiment in Rb and for a recent similar experiment in Na.