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Probing Stark-induced nonlinear phase variation with opto-optical modulation

Simpson, E. R. LU ; Labeye, M. ; Camp, S. ; Ibrakovic, N. LU ; Bengtsson, S. LU orcid ; Olofsson, A. LU ; Schafer, K. J. LU ; Gaarde, M. B. LU and Mauritsson, J. LU orcid (2019) In Physical Review A 100(2).
Abstract

We extend the recently developed technique of opto-optical modulation (OOM) to probe state-resolved ac-Stark-induced phase variations of a coherently excited ensemble of helium atoms. In a joint experimental and theoretical study, we find that the spatial redirection of the resonant emission from the OOM process is different for the low-lying 1s2p state as compared with the higher-lying Rydberg states, and that this redirection can be controlled through the spatial characteristics of the infrared (IR) probe beam. In particular, we observe that the intensity dependence of the IR-induced Stark phase on the 1s2p emission is nonlinear, and that the phase accumulation changes sign for moderate intensities. Our results suggest that OOM,... (More)

We extend the recently developed technique of opto-optical modulation (OOM) to probe state-resolved ac-Stark-induced phase variations of a coherently excited ensemble of helium atoms. In a joint experimental and theoretical study, we find that the spatial redirection of the resonant emission from the OOM process is different for the low-lying 1s2p state as compared with the higher-lying Rydberg states, and that this redirection can be controlled through the spatial characteristics of the infrared (IR) probe beam. In particular, we observe that the intensity dependence of the IR-induced Stark phase on the 1s2p emission is nonlinear, and that the phase accumulation changes sign for moderate intensities. Our results suggest that OOM, combined with precise experimental shaping of the probe beam, could allow future measurements of Stark-induced phase shifts of excited states.

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author
; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A
volume
100
issue
2
article number
023403
publisher
American Physical Society
external identifiers
  • scopus:85070545606
ISSN
2469-9926
DOI
10.1103/PhysRevA.100.023403
language
English
LU publication?
yes
id
2e1368d6-8547-4d37-94a9-a05819a81c2c
date added to LUP
2019-08-30 14:33:21
date last changed
2022-04-10 20:41:56
@article{2e1368d6-8547-4d37-94a9-a05819a81c2c,
  abstract     = {{<p>We extend the recently developed technique of opto-optical modulation (OOM) to probe state-resolved ac-Stark-induced phase variations of a coherently excited ensemble of helium atoms. In a joint experimental and theoretical study, we find that the spatial redirection of the resonant emission from the OOM process is different for the low-lying 1s2p state as compared with the higher-lying Rydberg states, and that this redirection can be controlled through the spatial characteristics of the infrared (IR) probe beam. In particular, we observe that the intensity dependence of the IR-induced Stark phase on the 1s2p emission is nonlinear, and that the phase accumulation changes sign for moderate intensities. Our results suggest that OOM, combined with precise experimental shaping of the probe beam, could allow future measurements of Stark-induced phase shifts of excited states.</p>}},
  author       = {{Simpson, E. R. and Labeye, M. and Camp, S. and Ibrakovic, N. and Bengtsson, S. and Olofsson, A. and Schafer, K. J. and Gaarde, M. B. and Mauritsson, J.}},
  issn         = {{2469-9926}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{2}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review A}},
  title        = {{Probing Stark-induced nonlinear phase variation with opto-optical modulation}},
  url          = {{http://dx.doi.org/10.1103/PhysRevA.100.023403}},
  doi          = {{10.1103/PhysRevA.100.023403}},
  volume       = {{100}},
  year         = {{2019}},
}