Coherent interaction of frequency-modulated laser pulses with Rb atoms

G. Djotyan, J. Bakos, G. Demeter, P. N. Ignácz, M. Á Kedves, Zs Sörlei, J. Szigeti, Z. Tóth

Research output: Contribution to journalArticle

Abstract

We investigate the behavior of Rb85 atoms in the field of a sequence of frequency-chirped short laser pulses for coherent manipulation of the Rb atomic beam. The analysis is based on numerical solution of equations for the density matrix elements of the hyperfine levels of the 5S 1/2-5P3/2 transition in Rb85 atom. We analyze two different regimes of interaction including relatively short laser pulses (when the width of the pulse envelope spectrum is of order or exceeds frequency interval between the hyperfine levels resulting in effective mixing of them) and relatively long ones (when the ground hyperfine levels are resolved but the excited ones are not resolved). We show that in all regimes considered, the interaction of a frequency-chirped laser pulse with the multilevel Rb 85 system is similar to the interaction with an effective two-level atom at sufficiently large peak intensities of the pulses. It allows us to perform efficient excitation of the multilevel atom by transferring populations of two hyperfine ground states to the excited ones and back to the ground states using a pair of frequency-chirped laser pulses. We present experimental results of utilizing this scheme of population transfer for coherent manipulation of an ensemble of Rb85 atoms in a magneto-optical trap.

Original languageEnglish
Pages (from-to)167-176
Number of pages10
JournalActa Physica Hungarica, Series B: Quantum Electronics
Volume20
Issue number3-4
Publication statusPublished - 2004

Fingerprint

pulses
lasers
atoms
interactions
manipulators
ground state
atomic beams
envelopes
traps
intervals
excitation

Keywords

  • Coherent manipulation of atoms
  • Frequency-chirped laser pulses
  • Magneto-optical trap
  • Rapid adiabatic passage

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Coherent interaction of frequency-modulated laser pulses with Rb atoms. / Djotyan, G.; Bakos, J.; Demeter, G.; Ignácz, P. N.; Kedves, M. Á; Sörlei, Zs; Szigeti, J.; Tóth, Z.

In: Acta Physica Hungarica, Series B: Quantum Electronics, Vol. 20, No. 3-4, 2004, p. 167-176.

Research output: Contribution to journalArticle

@article{4201bc92631d4786928eceeea19ca538,
title = "Coherent interaction of frequency-modulated laser pulses with Rb atoms",
abstract = "We investigate the behavior of Rb85 atoms in the field of a sequence of frequency-chirped short laser pulses for coherent manipulation of the Rb atomic beam. The analysis is based on numerical solution of equations for the density matrix elements of the hyperfine levels of the 5S 1/2-5P3/2 transition in Rb85 atom. We analyze two different regimes of interaction including relatively short laser pulses (when the width of the pulse envelope spectrum is of order or exceeds frequency interval between the hyperfine levels resulting in effective mixing of them) and relatively long ones (when the ground hyperfine levels are resolved but the excited ones are not resolved). We show that in all regimes considered, the interaction of a frequency-chirped laser pulse with the multilevel Rb 85 system is similar to the interaction with an effective two-level atom at sufficiently large peak intensities of the pulses. It allows us to perform efficient excitation of the multilevel atom by transferring populations of two hyperfine ground states to the excited ones and back to the ground states using a pair of frequency-chirped laser pulses. We present experimental results of utilizing this scheme of population transfer for coherent manipulation of an ensemble of Rb85 atoms in a magneto-optical trap.",
keywords = "Coherent manipulation of atoms, Frequency-chirped laser pulses, Magneto-optical trap, Rapid adiabatic passage",
author = "G. Djotyan and J. Bakos and G. Demeter and Ign{\'a}cz, {P. N.} and Kedves, {M. {\'A}} and Zs S{\"o}rlei and J. Szigeti and Z. T{\'o}th",
year = "2004",
language = "English",
volume = "20",
pages = "167--176",
journal = "Acta Physica Hungarica, Series B: Quantum Electronics",
issn = "1589-9535",
publisher = "Akademiai Kiado",
number = "3-4",

}

TY - JOUR

T1 - Coherent interaction of frequency-modulated laser pulses with Rb atoms

AU - Djotyan, G.

AU - Bakos, J.

AU - Demeter, G.

AU - Ignácz, P. N.

AU - Kedves, M. Á

AU - Sörlei, Zs

AU - Szigeti, J.

AU - Tóth, Z.

PY - 2004

Y1 - 2004

N2 - We investigate the behavior of Rb85 atoms in the field of a sequence of frequency-chirped short laser pulses for coherent manipulation of the Rb atomic beam. The analysis is based on numerical solution of equations for the density matrix elements of the hyperfine levels of the 5S 1/2-5P3/2 transition in Rb85 atom. We analyze two different regimes of interaction including relatively short laser pulses (when the width of the pulse envelope spectrum is of order or exceeds frequency interval between the hyperfine levels resulting in effective mixing of them) and relatively long ones (when the ground hyperfine levels are resolved but the excited ones are not resolved). We show that in all regimes considered, the interaction of a frequency-chirped laser pulse with the multilevel Rb 85 system is similar to the interaction with an effective two-level atom at sufficiently large peak intensities of the pulses. It allows us to perform efficient excitation of the multilevel atom by transferring populations of two hyperfine ground states to the excited ones and back to the ground states using a pair of frequency-chirped laser pulses. We present experimental results of utilizing this scheme of population transfer for coherent manipulation of an ensemble of Rb85 atoms in a magneto-optical trap.

AB - We investigate the behavior of Rb85 atoms in the field of a sequence of frequency-chirped short laser pulses for coherent manipulation of the Rb atomic beam. The analysis is based on numerical solution of equations for the density matrix elements of the hyperfine levels of the 5S 1/2-5P3/2 transition in Rb85 atom. We analyze two different regimes of interaction including relatively short laser pulses (when the width of the pulse envelope spectrum is of order or exceeds frequency interval between the hyperfine levels resulting in effective mixing of them) and relatively long ones (when the ground hyperfine levels are resolved but the excited ones are not resolved). We show that in all regimes considered, the interaction of a frequency-chirped laser pulse with the multilevel Rb 85 system is similar to the interaction with an effective two-level atom at sufficiently large peak intensities of the pulses. It allows us to perform efficient excitation of the multilevel atom by transferring populations of two hyperfine ground states to the excited ones and back to the ground states using a pair of frequency-chirped laser pulses. We present experimental results of utilizing this scheme of population transfer for coherent manipulation of an ensemble of Rb85 atoms in a magneto-optical trap.

KW - Coherent manipulation of atoms

KW - Frequency-chirped laser pulses

KW - Magneto-optical trap

KW - Rapid adiabatic passage

UR - http://www.scopus.com/inward/record.url?scp=11144276429&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=11144276429&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:11144276429

VL - 20

SP - 167

EP - 176

JO - Acta Physica Hungarica, Series B: Quantum Electronics

JF - Acta Physica Hungarica, Series B: Quantum Electronics

SN - 1589-9535

IS - 3-4

ER -