We report on a new type of sublevel echoes, synchronized-quantum-beat (SQB) echoes, generated by a successive application of two resonant light-pulse trains. The echoes are selectively generated for a sublevel pair whose frequency splitting is equal to an integral multiple of the repetition frequency of the light pulses. By using mode locked laser pulses tuned to the D(1) transition, we observed SQB echoes (and free induction decay) for all Zeeman and hyperfine transitions in the ground state of sodium atoms in low magnetic fields.We report on a new type of sublevel echoes, synchronized-quantum-beat (SQB) echoes, generated by a successive application of two resonant light-pulse trains. The echoes are selectively generated for a sublevel pair whose frequency splitting is equal to an integral multiple of the repetition frequency of the light pulses. By using mode locked laser pulses tuned to the D(1) transition, we observed SQB echoes (and free induction decay) for all Zeeman and hyperfine transitions in the ground state of sodium atoms in low magnetic fields.

Optics LettersDec 1, 198315 citations

Magnetic resonance at the quantum limit

Patrice Bertet

Bulletin of the American Physical SocietyMar 15, 20160 citations

Stark beats of Ar Rydberg states

Yumio Morioka, Tomohiro Aoto, H. Yoshii

Vacuum ultraviolet fluorescence decay spectra of Ar atom resonance lines excited by pulsed vacuum ultraviolet light in a synchrotron single bunch operation were obtained under a static electric field. When an atom under the static electric field was excited simultaneously to both the magnetic sublevels $M=0$ and $|M|=1$ by polarized light and the observation area was asymmetric, Stark beats were observed in the fluorescent decay spectra. All observed beat frequencies varied proportionally to the square of the external electric field. The results for $8d$ and $9d$ doublet lines were compared with those obtained by the usual second order perturbation theory, assuming mixing ratios between three $\mathrm{jl}$ coupling scheme d-type states. The beat frequencies were also measured for other resonance lines.Vacuum ultraviolet fluorescence decay spectra of Ar atom resonance lines excited by pulsed vacuum ultraviolet light in a synchrotron single bunch operation were obtained under a static electric field. When an atom under the static electric field was excited simultaneously to both the magnetic sublevels $M=0$ and $|M|=1$ by polarized light and the observation area was asymmetric, Stark beats were observed in the fluorescent decay spectra. All observed beat frequencies varied proportionally to the square of the external electric field. The results for $8d$ and $9d$ doublet lines were compared with those obtained by the usual second order perturbation theory, assuming mixing ratios between three $\mathrm{jl}$ coupling scheme d-type states. The beat frequencies were also measured for other resonance lines.

Physical Review AOct 15, 20017 citations

M=0

and

|M|=1

by polarized light and the observation area was asymmetric, Stark beats were observed in the fluorescent decay spectra. All observed beat frequencies varied proportionally to the square of the external electric field. The results for

8d

and

9d

doublet lines were compared with those obtained by the usual second order perturbation theory, assuming mixing ratios between three

\mathrm{jl}

coupling scheme d-type states. The beat frequencies were also measured for other resonance lines.