Imperial College London
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ProfessorVitaliAverbukh

Faculty of Natural Sciences, Department of Physics

Professor of Molecular Physics
 
 
 
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Contact

 

+44 (0)20 7594 7746v.averbukh Website

 
 
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Location

 

209Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@unpublished{Simpson:2015,
author = {Simpson, ER and Sanchez-Gonzalez, A and Austin, DR and Diveki, Z and Hutchinson, SEE and Siegel, T and Ruberti, M and Averbukh, V and Miseikis, L and Strüber, C and Chipperfield, L and Marangos, JP},
title = {The response of a neutral atom to a strong laser field probed by transient absorption near the ionisation threshold},
url = {http://arxiv.org/abs/1512.07652v1},
year = {2015}
}
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RIS format (EndNote, RefMan)

TY  - UNPB
AB  - We present transient absorption spectra of an extreme ultraviolet attosecondpulse train in helium dressed by an 800 nm laser field with intensity rangingfrom $2\times10^{12}$ W/cm$^2$ to $2\times10^{14}$ W/cm$^2$. The energy rangeprobed spans 16-42 eV, straddling the first ionisation energy of helium (24.59eV). By changing the relative polarisation of the dressing field with respectto the attosecond pulse train polarisation we observe a large change in themodulation of the absorption reflecting the vectorial response to the dressingfield. With parallel polarized dressing and probing fields, we observesignificant modulations with periods of one half and one quarter of thedressing field period. With perpendicularly polarized dressing and probingfields, the modulations of the harmonics above the ionisation threshold aresignificantly suppressed. A full-dimensionality solution of the single-atomtime-dependent Schr\"odinger equation obtained using the recently developedab-initio time-dependent B-spline ADC method reproduce some of ourobservations.
AU  - Simpson,ER
AU  - Sanchez-Gonzalez,A
AU  - Austin,DR
AU  - Diveki,Z
AU  - Hutchinson,SEE
AU  - Siegel,T
AU  - Ruberti,M
AU  - Averbukh,V
AU  - Miseikis,L
AU  - Strüber,C
AU  - Chipperfield,L
AU  - Marangos,JP
PY  - 2015///
TI  - The response of a neutral atom to a strong laser field probed by transient absorption near the ionisation threshold
UR  - http://arxiv.org/abs/1512.07652v1
UR  - http://hdl.handle.net/10044/1/31771
ER  -
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