arXiv:1409.0290 · Physical Review A

Quantum beat spectroscopy: Stimulated emission probe of hyperfine quantum beats in the atomic Cs 8p2P3/2 level

Servet Bayram, Phillip T. Arndt, Oleg Popov, C. Güney, W. P. Boyle, Mark D. Havey, Jacob McFarland

Published Dec 11, 2014• 13 citations

Abstract

Measurements of hyperfine polarization quantum beats are used to determine the magnetic dipole (A) and electric quadrupole (B) coupling constants in the excited atomic Cs $8p{\phantom{\rule{0.16em}{0ex}}}^{2}{P}_{3/2}$ level. The experimental approach is a combination of pulsed optical pumping and time-delayed stimulated-emission probing of the excited level. From the measured evolution of the atomic linear polarization degree as a function of probe delay time, we determine the hyperfine coupling constants $A=7.42(6)$ MHz and $B=0.14(29)$ MHz.

DOI: 10.1103/physreva.90.062510

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Hyperfine-interaction constants of the 8 D3/2 state in Rb85 using quantum-beat spectroscopy

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Excited state hyperfine structures in 133Cs using quantum beat spectroscopy

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Quantum beats arising from the hyperfine interaction were observed in the fluorescence produced when the 8D3/2, 9D3/2, and 10D3/2 states of 133Cs radiatively decayed to the 6P1/2 state. The period of the beats equals the reciprocal of the magnetic dipole coupling constant a since the 133Cs nucleus has a negligibly small electric quadrupole moment. The results are a = 3.95 ± 0.01, 2.38 ± 0.01, and 1.54 ± 0.02 MHz for the 8D3/2, 9D3/2, and 10D3/2 states, respectively.

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arXiv:1409.0290 · Physical Review A

Quantum beat spectroscopy: Stimulated emission probe of hyperfine quantum beats in the atomic Cs 8p2P3/2 level

Servet Bayram, Phillip T. Arndt, Oleg Popov, C. Güney, W. P. Boyle, Mark D. Havey, Jacob McFarland

Published Dec 11, 2014• 13 citations

arXiv HTML PDF

Abstract

Measurements of hyperfine polarization quantum beats are used to determine the magnetic dipole (A) and electric quadrupole (B) coupling constants in the excited atomic Cs

8p{\phantom{\rule{0.16em}{0ex}}}^{2}{P}_{3/2}

level. The experimental approach is a combination of pulsed optical pumping and time-delayed stimulated-emission probing of the excited level. From the measured evolution of the atomic linear polarization degree as a function of probe delay time, we determine the hyperfine coupling constants

A=7.42(6)

MHz and

B=0.14(29)

MHz.

DOI: 10.1103/physreva.90.062510

Related papers

Quantum beat spectroscopy: Stimulated emission probe of hyperfine quantum beats in the atomic cesium

Jacob McFarland, Phill Arndt, Burcin Bayram

Bulletin of the American Physical SocietyJun 9, 20150 citations

Measurement of hyperfine coupling constants in the 3dt2 Dj levels of K39 , K40 , and K41 by polarization quantum-beat spectroscopy

A. Sieradzan, R. Stoleru, Wo Yei +1 more

Hyperfine quantum-beat spectroscopy has been utilized in a pump-probe configuration to measure magnetic dipole (A) and electric quadrupole (B) coupling constants in the 3d ${\mathrm{}}^{2}$ ${\mathrm{D}}_{3\mathrm{/}2}$ and 3d ${\mathrm{}}^{2}$ ${\mathrm{D}}_{5\mathrm{/}2}$ levels of three isotopes of potassium. For many of these levels, the largest hyperfine splitting is smaller than the natural width, and so a subnatural linewidth technique is required. In the experiments, the 3d levels are excited on the 4d ${\mathrm{}}^{2}$ ${\mathrm{S}}_{1\mathrm{/}2}$ \ensuremath{\rightarrow}3d ${\mathrm{}}^{2}$ ${\mathrm{D}}_{\mathrm{j}}$ quadrupole transition with linearly polarized light. Time evolution of the alignment components in the d levels is probed by time-delayed resonant radiation on the 3d ${\mathrm{}}^{2}$ ${\mathrm{D}}_{\mathrm{j}}$ \ensuremath{\rightarrow}9p ${\mathrm{}}^{2}$ ${\mathrm{P}}_{\mathrm{j}}$ transitions. Comparison of the excitation rate for two orthogonal relative polarization directions of the pump and probe laser at each delay time permits derivation of a linear polarization degree. This quantity contains beats at the various hyperfine frequencies in the d levels. Fitting the experimentally obtained time dependence to theoretical expressions allows extraction of the hyperfine coupling constants. For the 3d ${\mathrm{}}^{2}$ ${\mathrm{D}}_{3\mathrm{/}2}$ level of $^{40}\mathrm{K}$ we obtain A=0.96(4) MHz and B=0.37(8) MHz, indicating a typical precision also obtained for the other levels and isotopes.Hyperfine quantum-beat spectroscopy has been utilized in a pump-probe configuration to measure magnetic dipole (A) and electric quadrupole (B) coupling constants in the 3d${\mathrm{}}^{2}$${\mathrm{D}}_{3\mathrm{/}2}$ and 3d${\mathrm{}}^{2}$${\mathrm{D}}_{5\mathrm{/}2}$ levels of three isotopes of potassium. For many of these levels, the largest hyperfine splitting is smaller than the natural width, and so a subnatural linewidth technique is required. In the experiments, the 3d levels are excited on the 4d${\mathrm{}}^{2}$${\mathrm{S}}_{1\mathrm{/}2}$\ensuremath{\rightarrow}3d${\mathrm{}}^{2}$${\mathrm{D}}_{\mathrm{j}}$ quadrupole transition with linearly polarized light. Time evolution of the alignment components in the d levels is probed by time-delayed resonant radiation on the 3d${\mathrm{}}^{2}$${\mathrm{D}}_{\mathrm{j}}$\ensuremath{\rightarrow}9p${\mathrm{}}^{2}$${\mathrm{P}}_{\mathrm{j}}$ transitions. Comparison of the excitation rate for two orthogonal relative polarization directions of the pump and probe laser at each delay time permits derivation of a linear polarization degree. This quantity contains beats at the various hyperfine frequencies in the d levels. Fitting the experimentally obtained time dependence to theoretical expressions allows extraction of the hyperfine coupling constants. For the 3d${\mathrm{}}^{2}$${\mathrm{D}}_{3\mathrm{/}2}$ level of $^{40}\mathrm{K}$ we obtain A=0.96(4) MHz and B=0.37(8) MHz, indicating a typical precision also obtained for the other levels and isotopes.

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Hyperfine-interaction constants of the 8 D3/2 state in Rb85 using quantum-beat spectroscopy

William Arie van Wijngaarden, Junlei Li, J. Koh

Quantum beats due to the hyperfine interaction were observed in the radiative decay of the 8 ${\mathit{D}}_{3/2}$ state in $^{85}\mathrm{Rb}$ . The data agree well with theory allowing determination of the magnetic-dipole (\ensuremath{\Vert}a\ensuremath{\Vert}=0.879\ifmmode\pm\else\textpm\fi{}0.008 MHz) and electric-quadrupole (\ensuremath{\Vert}b\ensuremath{\Vert}=0.15\ifmmode\pm\else\textpm\fi{}0.02 MHz) (a/b>0) hyperfine constants. The results are consistent with those obtained for other ${\mathit{D}}_{3/2}$ states in $^{85}\mathrm{Rb}$ and $^{87}\mathrm{Rb}$ . The observed magnetic-dipole constants for the ${\mathit{nD}}_{3/2}$ n>7 states of $^{85}\mathrm{Rb}$ are given to within 2% by the relation a(MHz)=252/ ${\mathit{n}}^{\mathrm{*}3}$ where ${\mathit{n}}^{\mathrm{*}}$ is the effective principal quantum number.Quantum beats due to the hyperfine interaction were observed in the radiative decay of the 8${\mathit{D}}_{3/2}$ state in $^{85}\mathrm{Rb}$. The data agree well with theory allowing determination of the magnetic-dipole (\ensuremath{\Vert}a\ensuremath{\Vert}=0.879\ifmmode\pm\else\textpm\fi{}0.008 MHz) and electric-quadrupole (\ensuremath{\Vert}b\ensuremath{\Vert}=0.15\ifmmode\pm\else\textpm\fi{}0.02 MHz) (a/b>0) hyperfine constants. The results are consistent with those obtained for other ${\mathit{D}}_{3/2}$ states in $^{85}\mathrm{Rb}$ and $^{87}\mathrm{Rb}$. The observed magnetic-dipole constants for the ${\mathit{nD}}_{3/2}$ n>7 states of $^{85}\mathrm{Rb}$ are given to within 2% by the relation a(MHz)=252/${\mathit{n}}^{\mathrm{*}3}$ where ${\mathit{n}}^{\mathrm{*}}$ is the effective principal quantum number.

Physical Review AJul 1, 19938 citations

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Observation of quantum beats in the 6 D3/2 →5 P1/2 transition in Rb85

William Arie van Wijngaarden, Keith Bonin, W. Happer

Quantum beats due to the hyperfine interaction were observed in the 6 ${D}_{3/2}$ \ensuremath{\rightarrow}5 ${P}_{1/2}$ transition in $^{85}\mathrm{Rb}$ . Good agreement with theory was obtained, allowing determination of the values for the magnetic dipole (a=2.32\ifmmode\pm\else\textpm\fi{}0.06 MHz) and electric quadrupole (b=1.62\ifmmode\pm\else\textpm\fi{}0.06 MHz) hyperfine constants for the upper state.Quantum beats due to the hyperfine interaction were observed in the 6${D}_{3/2}$\ensuremath{\rightarrow}5${P}_{1/2}$ transition in $^{85}\mathrm{Rb}$. Good agreement with theory was obtained, allowing determination of the values for the magnetic dipole (a=2.32\ifmmode\pm\else\textpm\fi{}0.06 MHz) and electric quadrupole (b=1.62\ifmmode\pm\else\textpm\fi{}0.06 MHz) hyperfine constants for the upper state.

Physical Review AJan 1, 198613 citations

Measurements of hyperfine polarization quantum beats are used to determine the magnetic dipole (A) and electric quadrupole (B) coupling constants in the excited atomic Cs

8p{\phantom{\rule{0.16em}{0ex}}}^{2}{P}_{3/2}

A=7.42(6)

MHz and

B=0.14(29)

MHz.

Hyperfine quantum-beat spectroscopy has been utilized in a pump-probe configuration to measure magnetic dipole (A) and electric quadrupole (B) coupling constants in the 3d

{\mathrm{}}^{2}

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

and 3d

{\mathrm{}}^{2}

{\mathrm{D}}_{5\mathrm{/}2}

levels of three isotopes of potassium. For many of these levels, the largest hyperfine splitting is smaller than the natural width, and so a subnatural linewidth technique is required. In the experiments, the 3d levels are excited on the 4d

{\mathrm{}}^{2}

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

\ensuremath{\rightarrow}3d

{\mathrm{}}^{2}

{\mathrm{D}}_{\mathrm{j}}

quadrupole transition with linearly polarized light. Time evolution of the alignment components in the d levels is probed by time-delayed resonant radiation on the 3d

{\mathrm{}}^{2}

{\mathrm{D}}_{\mathrm{j}}

\ensuremath{\rightarrow}9p

{\mathrm{}}^{2}

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

transitions. Comparison of the excitation rate for two orthogonal relative polarization directions of the pump and probe laser at each delay time permits derivation of a linear polarization degree. This quantity contains beats at the various hyperfine frequencies in the d levels. Fitting the experimentally obtained time dependence to theoretical expressions allows extraction of the hyperfine coupling constants. For the 3d

{\mathrm{}}^{2}

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

level of

^{40}\mathrm{K}

we obtain A=0.96(4) MHz and B=0.37(8) MHz, indicating a typical precision also obtained for the other levels and isotopes.

Quantum beats due to the hyperfine interaction were observed in the radiative decay of the 8

{\mathit{D}}_{3/2}

state in

^{85}\mathrm{Rb}

. The data agree well with theory allowing determination of the magnetic-dipole (\ensuremath{\Vert}a\ensuremath{\Vert}=0.879\ifmmode\pm\else\textpm\fi{}0.008 MHz) and electric-quadrupole (\ensuremath{\Vert}b\ensuremath{\Vert}=0.15\ifmmode\pm\else\textpm\fi{}0.02 MHz) (a/b>0) hyperfine constants. The results are consistent with those obtained for other

{\mathit{D}}_{3/2}

states in

^{85}\mathrm{Rb}

and

^{87}\mathrm{Rb}

. The observed magnetic-dipole constants for the

{\mathit{nD}}_{3/2}

n>7 states of

^{85}\mathrm{Rb}

are given to within 2% by the relation a(MHz)=252/

{\mathit{n}}^{\mathrm{*}3}

where

{\mathit{n}}^{\mathrm{*}}

is the effective principal quantum number.

Quantum beats due to the hyperfine interaction were observed in the 6

{D}_{3/2}

\ensuremath{\rightarrow}5

{P}_{1/2}

transition in

^{85}\mathrm{Rb}

. Good agreement with theory was obtained, allowing determination of the values for the magnetic dipole (a=2.32\ifmmode\pm\else\textpm\fi{}0.06 MHz) and electric quadrupole (b=1.62\ifmmode\pm\else\textpm\fi{}0.06 MHz) hyperfine constants for the upper state.