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physics.atom-ph2019★ 8 cited
Probing Stark-induced nonlinear phase variation with opto-optical modulation
E. R. Simpson, M. Labeye, S. Camp +6
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 ato…
physics.atom-ph2015★ 1 cited
The response of a neutral atom to a strong laser field probed by transient absorption near the ionisation threshold
E. R. Simpson, A. Sanchez-Gonzalez, D. R. Austin +9
We present transient absorption spectra of an extreme ultraviolet attosecond pulse train in helium dressed by an 800 nm laser field with intensity ranging from W/c…