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Theoretical Investigation of Two-Color Two-Photon 6S(2)S(1/2) Going to 5D(2)D(J) Going to 11P(2)P(3/2) Excitation and Depolarization Spectra in Atomic Cesium.

B. V. Dobrydnev

Published Jan 1, 1995• 0 citations
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Theoretical investigation of two-color, two-photon, 6s 2 S1/2 →5d 2 Dj →11p 2 P3/2 excitation and depolarization spectra in atomic Cs

B. V. Dobrydnev, Mark D. Havey

Results of a theoretical investigation of two-photon, two-color excitation and linear depolarization spectra in atomic cesium are presented. The case of two-beam excitation, where one photon is absorbed through a quadrupole amplitude and the other through a dipole amplitude, is considered. When excitation is through a spin multiplet, the final-state population produced depends sensitively on the relative transition amplitudes through the nondengenerate spin-multiplet terms. In addition, the transition rate contains interference terms depending on the relative directions of the two beams. These terms are manifested strongly when the intermediate states are nonresonant and when the two beams have approximately the same frequency. Application of the results to the 6s${\mathrm{}}^{2}$${\mathit{S}}_{1/2}$\ensuremath{\rightarrow}5d${\mathrm{}}^{2}$${\mathit{D}}_{\mathit{j}}$\ensuremath{\rightarrow}11p${\mathrm{}}^{2}$${\mathit{P}}_{3/2}$, quadrupole-dipole transition in atomic Cs is made. Polarization-dependent excitation spectra are presented for this case. Effects of hyperfine interactions are also considered.

Physical Review A•Nov 1, 1995•5 citations

Electric-field modification of two-photon, two-color, quadrupole-dipole depolarization spectra in atomic Cs

B. V. Dobrydnev, Mark D. Havey

An earlier study of the 6s${\mathrm{}}^{2}$${\mathit{S}}_{1/2}$\ensuremath{\rightarrow}5d${\mathrm{}}^{2}$${\mathit{D}}_{\mathit{j}}$\ensuremath{\rightarrow}11p${\mathrm{}}^{2}$${\mathit{P}}_{3/2}$ two-photon, dipole-quadrupole transition in Cs is extended by including the effect of an external static electric field. The dependence of the absorption spectrum on the relative polarizations of the two light sources is found to be greatly modified by a moderately sized electric field, the predominant effect being mixing of the resonant 6p${\mathrm{}}^{2}$${\mathit{P}}_{\mathit{j}}$ levels into the ground 6s${\mathrm{}}^{2}$${\mathit{S}}_{1/2}$ level. Compact theoretical expressions, parametrized in terms of the electric-field strength and the relative transition matrix elements through the 5d${\mathrm{}}^{2}$${\mathit{D}}_{\mathit{j}}$ multiplet levels, are given. Results are presented for the electric-field dependence of a linear depolarization ratio, which is very sensitive to these quantities. \textcopyright{} 1996 The American Physical Society.

Physical Review A•Nov 1, 1996•2 citations
Results of a theoretical investigation of two-photon, two-color excitation and linear depolarization spectra in atomic cesium are presented. The case of two-beam excitation, where one photon is absorbed through a quadrupole amplitude and the other through a dipole amplitude, is considered. When excitation is through a spin multiplet, the final-state population produced depends sensitively on the relative transition amplitudes through the nondengenerate spin-multiplet terms. In addition, the transition rate contains interference terms depending on the relative directions of the two beams. These terms are manifested strongly when the intermediate states are nonresonant and when the two beams have approximately the same frequency. Application of the results to the 6s2{\mathrm{}}^{2}2S1/2{\mathit{S}}_{1/2}S1/2​\ensuremath{\rightarrow}5d2{\mathrm{}}^{2}2Dj{\mathit{D}}_{\mathit{j}}Dj​\ensuremath{\rightarrow}11p2{\mathrm{}}^{2}2P3/2{\mathit{P}}_{3/2}P3/2​, quadrupole-dipole transition in atomic Cs is made. Polarization-dependent excitation spectra are presented for this case. Effects of hyperfine interactions are also considered.
An earlier study of the 6s2{\mathrm{}}^{2}2S1/2{\mathit{S}}_{1/2}S1/2​\ensuremath{\rightarrow}5d2{\mathrm{}}^{2}2Dj{\mathit{D}}_{\mathit{j}}Dj​\ensuremath{\rightarrow}11p2{\mathrm{}}^{2}2P3/2{\mathit{P}}_{3/2}P3/2​ two-photon, dipole-quadrupole transition in Cs is extended by including the effect of an external static electric field. The dependence of the absorption spectrum on the relative polarizations of the two light sources is found to be greatly modified by a moderately sized electric field, the predominant effect being mixing of the resonant 6p2{\mathrm{}}^{2}2Pj{\mathit{P}}_{\mathit{j}}Pj​ levels into the ground 6s2{\mathrm{}}^{2}2S1/2{\mathit{S}}_{1/2}S1/2​ level. Compact theoretical expressions, parametrized in terms of the electric-field strength and the relative transition matrix elements through the 5d2{\mathrm{}}^{2}2Dj{\mathit{D}}_{\mathit{j}}Dj​ multiplet levels, are given. Results are presented for the electric-field dependence of a linear depolarization ratio, which is very sensitive to these quantities. \textcopyright{} 1996 The American Physical Society.