Observation of quantum beating in Rb at 2.1 THz and 18.2 THz: Long-range Rb*-Rb interactions

Goldshlag, William

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https://hdl.handle.net/2142/96931 Copy

Description

Title

Observation of quantum beating in Rb at 2.1 THz and 18.2 THz: Long-range Rb*-Rb interactions

Author(s)

Goldshlag, William

Contributor(s)

• Eden, J. Gary
• Ricconi, Brian J.

Issue Date

2017-06-20

Keyword(s)

Fundamental interest

Abstract

begin{wrapfigure}{r}{0pt}_x000d_ includegraphics[scale=.6]{fig.eps}_x000d_ end{wrapfigure}_x000d_ The interaction of Rb 7s $^{2}S_{1/2}$, 5d $^{2}D_{3/2,5/2}$ and 5p $^{2}P_{3/2}$ atoms with the background species at long range (100-1000AA) has been observed by pump-probe ultrafast laser spectroscopy. Parametric four-wave mixing in Rb vapor with pairs of 50-70 fs pulses produces coherent Rb 6P-5S emission at 420 nm that is modulated by Rb quantum beating. The two dominant beating frequencies are 18.2 THz and 2.07 THz, corresponding to quantum beating between 7S and 5D states and to the (5D-5P$_{3/2}$)-(5P$_{3/2}$-5S) defect, respectively. Analysis of Rabi oscillations in these pump-probe experiments allows for the mean interaction energy at long range to be determined. _x000d_ The figure shows Fourier transform spectra of representative Rabi oscillation waveforms. The waveform and spectrum at left illustrate quantum beating in Rb at 2.1 THz. The spectrum at right is dominated by the 18.2 THz frequency component generated by 7S-5D beating in Rb. Insets show respective temporal behaviors of the 6P-5S line near the coherent transient (zero interpulse delay)._x000d_ _x000d_

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/96931

DOI

https://doi.org/10.15278/isms.2017.TE02

Copyright and License Information

Copyright 2017 William Goldshlag

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