Physical Review A

Electric field enhancement of depolarization of excited states

Munir Hasan Nayfeh, G. Barry Hillard, Wallace L. Glab

Published Dec 1, 1985• 2 citations

Abstract

Our calculations show that an external dc electric field can enhance by many orders of magnitude the depolarization cross section of highly excited atoms by charged particles. The enhancement is due to the fact that the electric field extends and shifts the electronic charge distribution along its direction, thus effectively creating a giant electric dipole in the atom.

DOI: 10.1103/physreva.32.3324

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

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Physical Review ANov 1, 19962 citations

Physical Review A

Electric field enhancement of depolarization of excited states

Munir Hasan Nayfeh, G. Barry Hillard, Wallace L. Glab

Published Dec 1, 1985• 2 citations

Publisher

Abstract

DOI: 10.1103/physreva.32.3324

Related papers

One-dimensional giant dipole atoms

Munir Hasan Nayfeh, Dong-Yong Yao, Y. Ying +3 more

AIP conference proceedingsJan 1, 19864 citations

Highly excited states of atomic potassium in an external electric field

G. Barry Hillard

Jan 1, 19840 citations

Highly Excited Hydrogen in Strong D.C. Electric Fields: Atomic Engineering

Munir Hasan Nayfeh

Journal of Modern OpticsMar 1, 19881 citation

Electric Field Excitation Suppression in Cold Atoms

Jianing Han, Juliet Mitchell, Morgan Umstead

In this article, the atom excitation suppression is studied in two mechanisms. The first mechanism for excitation suppression is caused by an external DC electric field. The second mechanism is due to the energy shift caused by an electric field generated by free charges, which are created by ionizing atoms. The latter mechanism is known as the Coulomb blockade. Here, the Coulomb forces originate from ions created by ionizing atoms with a UV laser. The interaction, which causes the suppression, is treated theoretically as dipole–charge interactions. In the model, the charge is an ion, and the dipole is an atom. From measurements, we use 85Rb atoms. The valence electron and the ion core are the two poles of an electric dipole. The interaction potential energy between the ion and the atom is proportional to 1R2, and the frequency shift caused by this interaction is proportional to 1R4, where R is the distance between the ion and the dipole considered. This research is motivated by potential applications for quantum information storage, remote control, creating hot plasmas using cold atoms, as well as electronic devices.In this article, the atom excitation suppression is studied in two mechanisms. The first mechanism for excitation suppression is caused by an external DC electric field. The second mechanism is due to the energy shift caused by an electric field generated by free charges, which are created by ionizing atoms. The latter mechanism is known as the Coulomb blockade. Here, the Coulomb forces originate from ions created by ionizing atoms with a UV laser. The interaction, which causes the suppression, is treated theoretically as dipole–charge interactions. In the model, the charge is an ion, and the dipole is an atom. From measurements, we use 85Rb atoms. The valence electron and the ion core are the two poles of an electric dipole. The interaction potential energy between the ion and the atom is proportional to 1R2, and the frequency shift caused by this interaction is proportional to 1R4, where R is the distance between the ion and the dipole considered. This research is motivated by potential applications for quantum information storage, remote control, creating hot plasmas using cold atoms, as well as electronic devices.

arXiv:1904.09706AtomsAug 20, 20200 citations

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Nikolai L. Manakov, Vitalii D Ovsiannikov

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Journal of Physics B Atomic Molecular and Optical PhysicsMay 14, 19978 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.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 ANov 1, 19962 citations

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.