Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

International Conference on Ultrafast Phenomena

Observation of 7.2 THz Beats between the D-Lines of Atomic Rb

J. E. Golub, THOMAS W. MOSSBERG

Published Jan 1, 1986• 0 citations
Publisher

Abstract

Over the past few years, dramatic advances in short pulse technology have pushed studies of dynamical processes to ever shorter time scales. Unfortunately, short pulse technology remains beyond the means of many investigators. A simple and clever alternative approach to achieving high temporal resolution was recently proposed by several groups1−4. In this approach, time resolution is limited only by the coherence time of the excitation light, rather than by its duration. Since laser light of short coherence time (i.e. large bandwidth) is much more easily generated than the corresponding short pulse, this result is of great importance.

DOI
10.1364/up.1986.tud1

Related papers

Picosecond dephasing studies in atomic vapors and observation of a 139-fs beat

J. E. Golub, THOMAS W. MOSSBERG

Several groups1–4 have recently proposed a simple and powerful optical technique for obtaining ultrahigh time resolution, which is limited only by the coherence time of the excitation light rather than by the overall pulse duration. The present work reports an application of this technique to study the dephasing rates of the Na and Rb resonance lines perturbed by several atmospheres of argon gas. By comparison with traditional measurements, we demonstrate that relaxation processes occurring on time scales much shorter than the excitation pulse duration can indeed be accurately and unambiguously measured using the present technique.

•Jun 9, 1986•0 citations

Observation of 7.2-THz Beats Between the D-Lines of Atomic Rb

J. E. Golub, THOMAS W. MOSSBERG

Springer series in chemical physics•Jan 1, 1986•1 citation

Time and frequency resolved detection of quantum coherences in systems, driven by strong ultrashort laser fields

Stanislav O. Konorov, John W. Hepburn, Valery Milner

Bulletin of the American Physical Society•May 26, 2010•0 citations

Rabi Oscillations and Coherence Dynamics in Terahertz Streaking-Assisted Photoelectron Spectrum

Shuai Wang, Zhiyuan Zhu, Yizhu Zhang +2 more

We present an approach, a Terahertz streaking-assisted photoelectron spectrum (THz SAPS), to achieve direct observations of ultrafast coherence dynamics with timescales beyond the pulse duration. Using a 24 fs probe pulse, the THz SAPS enables us to well visualize Rabi oscillations of 11.76 fs and quantum beats of 2.62 fs between the 5S 1/2 and 5P 3/2 in rubidium atoms. The numerical results show that the THz SAPS can simultaneously achieve high resolution in both frequency and time domains without the limitation of Heisenberg uncertainty of the probe pulse. The long probe pulse promises sufficiently high frequency resolution in photoelectron spectroscopy allowing to observe Autler–Townes splittings, whereas the streaking THz field enhances temporal resolution for not only Rabi oscillations but also quantum beats between the ground and excited states. The THz SAPS demonstrates a potential applicability for observation and manipulation of ultrafast coherence processes in frequency and time domains.

Chinese Physics Letters•Jan 1, 2021•4 citations

Ultrahigh-frequency interference beats in transient, incoherent-light four-wave mixing

J. E. Golub, THOMAS W. MOSSBERG

An angled-beam, transient four-wave mixing experiment is described in which nanosecond-duration, broad-bandwidth excitation pulses are employed to measure picosecond collisional dephasing and subpicosecond interference beats in atomic Rb vapor. The 7.2-THz interference beat, which corresponds to a 237 cm(-1) Rb fine-structure splitting, is apparently the fastest material-specific beat yet observed. We discuss practical limitations on the time resolution attainable with this technique and propose means of circumventing them by using broad-bandwidth collinear excitation beams and an angled narrow-bandwidth probe.

Optics Letters•Jul 1, 1986•26 citations

Ultrahigh Time-Resolution Coherent Transient Spectroscopy with Incoherent or Phase-Modulated Light

Tatsuo Yajima, Norio Morita, Yuzo Ishida

Journal of the Optical Society of America B•Jan 1, 1984•1 citation
Over the past few years, dramatic advances in short pulse technology have pushed studies of dynamical processes to ever shorter time scales. Unfortunately, short pulse technology remains beyond the means of many investigators. A simple and clever alternative approach to achieving high temporal resolution was recently proposed by several groups1−4. In this approach, time resolution is limited only by the coherence time of the excitation light, rather than by its duration. Since laser light of short coherence time (i.e. large bandwidth) is much more easily generated than the corresponding short pulse, this result is of great importance.
Several groups1–4 have recently proposed a simple and powerful optical technique for obtaining ultrahigh time resolution, which is limited only by the coherence time of the excitation light rather than by the overall pulse duration. The present work reports an application of this technique to study the dephasing rates of the Na and Rb resonance lines perturbed by several atmospheres of argon gas. By comparison with traditional measurements, we demonstrate that relaxation processes occurring on time scales much shorter than the excitation pulse duration can indeed be accurately and unambiguously measured using the present technique.
We present an approach, a Terahertz streaking-assisted photoelectron spectrum (THz SAPS), to achieve direct observations of ultrafast coherence dynamics with timescales beyond the pulse duration. Using a 24 fs probe pulse, the THz SAPS enables us to well visualize Rabi oscillations of 11.76 fs and quantum beats of 2.62 fs between the 5S 1/2 and 5P 3/2 in rubidium atoms. The numerical results show that the THz SAPS can simultaneously achieve high resolution in both frequency and time domains without the limitation of Heisenberg uncertainty of the probe pulse. The long probe pulse promises sufficiently high frequency resolution in photoelectron spectroscopy allowing to observe Autler–Townes splittings, whereas the streaking THz field enhances temporal resolution for not only Rabi oscillations but also quantum beats between the ground and excited states. The THz SAPS demonstrates a potential applicability for observation and manipulation of ultrafast coherence processes in frequency and time domains.
An angled-beam, transient four-wave mixing experiment is described in which nanosecond-duration, broad-bandwidth excitation pulses are employed to measure picosecond collisional dephasing and subpicosecond interference beats in atomic Rb vapor. The 7.2-THz interference beat, which corresponds to a 237 cm(-1) Rb fine-structure splitting, is apparently the fastest material-specific beat yet observed. We discuss practical limitations on the time resolution attainable with this technique and propose means of circumventing them by using broad-bandwidth collinear excitation beams and an angled narrow-bandwidth probe.