We study time delay in atomic photoionization by circularly polarized light. By considering the Li atom in an excited $2p$ state, we demonstrate a strong time-delay asymmetry between the photoemission of the target electrons that are co- and counter-rotating with the electromagnetic field in the polarization plane. In addition, we observe the time-delay sensitivity to the polar angle of the photoelectron emission in the polarization plane. This modulation depends on the shape and duration of the electromagnetic pulse.We study time delay in atomic photoionization by circularly polarized light. By considering the Li atom in an excited $2p$ state, we demonstrate a strong time-delay asymmetry between the photoemission of the target electrons that are co- and counter-rotating with the electromagnetic field in the polarization plane. In addition, we observe the time-delay sensitivity to the polar angle of the photoelectron emission in the polarization plane. This modulation depends on the shape and duration of the electromagnetic pulse.

Physical Review AMar 7, 201348 citations

Polarization-dependent photoionization cross sections and radiative lifetimes of atomic states in BaI

C.-H. Li, Dmitry Budker

The photoionization cross sections of two even-parity excited states $5d6d\phantom{\rule{0.3em}{0ex}}^{3}D_{1}$ and $6s7d\phantom{\rule{0.3em}{0ex}}^{3}D_{2}$ of atomic Ba at the ionization-laser wavelength of $556.6\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ were measured. We found that the total cross section depends on the relative polarization of the atoms and the ionization-laser light. With density-matrix algebra, we show that, in general, there are at most three parameters in the photoionization cross section. Some of these parameters are determined in this work. We also present the measurement of the radiative lifetime of five even-parity excited states of barium.The photoionization cross sections of two even-parity excited states $5d6d\phantom{\rule{0.3em}{0ex}}^{3}D_{1}$ and $6s7d\phantom{\rule{0.3em}{0ex}}^{3}D_{2}$ of atomic Ba at the ionization-laser wavelength of $556.6\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$ were measured. We found that the total cross section depends on the relative polarization of the atoms and the ionization-laser light. With density-matrix algebra, we show that, in general, there are at most three parameters in the photoionization cross section. Some of these parameters are determined in this work. We also present the measurement of the radiative lifetime of five even-parity excited states of barium.

arXiv:physics/0602189Physical Review AJul 31, 20067 citations

Photoionization of polarized Rydberg atoms

V. D. Ovsyannikov

Optics and SpectroscopyJul 1, 19931 citation

Resonance photoionization of the excited helium

S. Danzan, B. Zhadamba, Ts. Sukhbaatar +2 more

Unknown eBooksJan 1, 19930 citations

Photoionization of He(n

sup 1

sup 3

P) atoms excited by polarized light

We study time delay in atomic photoionization by circularly polarized light. By considering the Li atom in an excited

2p

state, we demonstrate a strong time-delay asymmetry between the photoemission of the target electrons that are co- and counter-rotating with the electromagnetic field in the polarization plane. In addition, we observe the time-delay sensitivity to the polar angle of the photoelectron emission in the polarization plane. This modulation depends on the shape and duration of the electromagnetic pulse.

The photoionization cross sections of two even-parity excited states

5d6d\phantom{\rule{0.3em}{0ex}}^{3}D_{1}

and

6s7d\phantom{\rule{0.3em}{0ex}}^{3}D_{2}

of atomic Ba at the ionization-laser wavelength of

556.6\phantom{\rule{0.3em}{0ex}}\mathrm{nm}

were measured. We found that the total cross section depends on the relative polarization of the atoms and the ionization-laser light. With density-matrix algebra, we show that, in general, there are at most three parameters in the photoionization cross section. Some of these parameters are determined in this work. We also present the measurement of the radiative lifetime of five even-parity excited states of barium.