arXiv:physics/0511123 · Physical Review A

Pump-probe nonlinear magneto-optical rotation with frequency-modulated light

Szymon Pustelny, Derek F. Jackson Kimball, Simon Rochester, Valeriy V. Yashchuk, Wojciech Gawlik, Dmitry Budker

Published Feb 21, 2006• 49 citations

Abstract

Specific types of atomic coherences between Zeeman sublevels can be generated and detected using a method based on nonlinear magneto-optical rotation with frequency-modulated light. Linearly polarized, frequency-modulated light is employed to selectively generate ground-state coherences between Zeeman sublevels for which $\mathrm{\ensuremath{\Delta}}m=2$ and $\mathrm{\ensuremath{\Delta}}m=4$ in $^{85}\mathrm{Rb}$ and $^{87}\mathrm{Rb}$ atoms, and additionally $\mathrm{\ensuremath{\Delta}}m=6$ in $^{85}\mathrm{Rb}$. The atomic coherences are detected with a separate, unmodulated probe light beam. Separation of the pump and probe beams enables independent investigation of the processes of creation and detection of the atomic coherences. With the present technique the transfer of the Zeeman coherences, including high-order coherences, from excited to ground state by spontaneous emission has been observed.

DOI: 10.1103/physreva.73.023817

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arXiv:physics/0511123 · Physical Review A

Pump-probe nonlinear magneto-optical rotation with frequency-modulated light

Szymon Pustelny, Derek F. Jackson Kimball, Simon Rochester, Valeriy V. Yashchuk, Wojciech Gawlik, Dmitry Budker

Published Feb 21, 2006• 49 citations

arXiv HTML PDF

Abstract

\mathrm{\ensuremath{\Delta}}m=2

and

\mathrm{\ensuremath{\Delta}}m=4

^{85}\mathrm{Rb}

and

^{87}\mathrm{Rb}

atoms, and additionally

\mathrm{\ensuremath{\Delta}}m=6

^{85}\mathrm{Rb}

. The atomic coherences are detected with a separate, unmodulated probe light beam. Separation of the pump and probe beams enables independent investigation of the processes of creation and detection of the atomic coherences. With the present technique the transfer of the Zeeman coherences, including high-order coherences, from excited to ground state by spontaneous emission has been observed.

DOI: 10.1103/physreva.73.023817

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Nonlinear magneto-optical rotation narrowing in vacuum gas cells due to interference between atomic dark states of two spatially separated laser beams

Marina M. Mijailović, Z. D. Grujić, Milan Radonjić +2 more

We present, experimentally and theoretically, nonlinear magneto-optical rotation (NMOR) using two spatially separated laser beams, the pump laser beam for creation and the probe laser beam for detection of the coherence between ground Zeeman sublevels. Both pump and probe lasers are tuned to ${F}_{g}=2\ensuremath{\rightarrow}{F}_{e}=1$ transition in $^{87}\text{R}\text{b}$ . With the specially designed spatial configuration of the pump and the probe beams we were able to obtain dispersively shaped probe laser NMOR resonances in the Rb vacuum gas cell. The theory indicates that the obtained line shapes are due to the interference between prepared atomic states and the probe laser field. The interference nature of the resonances is supported by narrowing of NMOR resonances with increased separation between laser beams, and by the shift of the central fringe from the zero magnetic field with increased angle between initial orientation of electric vectors of linearly polarized pump and probe beams.We present, experimentally and theoretically, nonlinear magneto-optical rotation (NMOR) using two spatially separated laser beams, the pump laser beam for creation and the probe laser beam for detection of the coherence between ground Zeeman sublevels. Both pump and probe lasers are tuned to ${F}_{g}=2\ensuremath{\rightarrow}{F}_{e}=1$ transition in $^{87}\text{R}\text{b}$. With the specially designed spatial configuration of the pump and the probe beams we were able to obtain dispersively shaped probe laser NMOR resonances in the Rb vacuum gas cell. The theory indicates that the obtained line shapes are due to the interference between prepared atomic states and the probe laser field. The interference nature of the resonances is supported by narrowing of NMOR resonances with increased separation between laser beams, and by the shift of the central fringe from the zero magnetic field with increased angle between initial orientation of electric vectors of linearly polarized pump and probe beams.

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\mathrm{\ensuremath{\Delta}}m=2

and

\mathrm{\ensuremath{\Delta}}m=4

^{85}\mathrm{Rb}

and

^{87}\mathrm{Rb}

atoms, and additionally

\mathrm{\ensuremath{\Delta}}m=6

^{85}\mathrm{Rb}

^{87}\text{R}\text{b}

. With the specially designed spatial configuration of the pump and the probe beams we were able to obtain dispersively shaped probe laser NMOR resonances in the Rb vacuum gas cell. The theory indicates that the obtained line shapes are due to the interference between prepared atomic states and the probe laser field. The interference nature of the resonances is supported by narrowing of NMOR resonances with increased separation between laser beams, and by the shift of the central fringe from the zero magnetic field with increased angle between initial orientation of electric vectors of linearly polarized pump and probe beams.

^{87}\mathrm{Rb}

. By appropriate tuning of the modulation frequency and magnetic-field induction the efficiency of a given coherence generation is controlled. The processes are analyzed versus different experimental parameters.