Femtosecond transparency in the extreme ultraviolet
POSTER
Abstract
Electromagnetically induced transparency-like behavior in the extreme ultraviolet (XUV) is studied theoretically, including the effect of intense 800\thinspace nm laser dressing of He 2s2p($^1P^o$) and 2p$^2(^2S^e$) autoionizing states. We present an \textit{ab initio} solution of the time-dependent Schr\"odinger equation in an \textsl{LS}-coupling configuration interaction basis set. The method enables a rigorous treatment of optical field ionization of these coupled autoionizing states into the $N = 2$ continuum in addition to $N = 1$. Our calculated transient absorption spectra show the formation of the Autler-Townes doublet in the presence of the dressing laser field. The presented results are in encouraging agreement with experiment [1]. \\[4pt] [1] Z.H. Loh, C.H. Greene, and S. R. Leone, Chem. Phys. 350, 7 (2008)
Authors
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Michal Tarana
Department of Physics and JILA, University of Colorado, Boulder, Colorado 80309-0440, USA
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Chris H. Greene
Department of Physics and JILA, University of Colorado, Boulder, CO 80309-0440, Department of Physics and JILA, University of Colorado, Boulder, Colorado 80309-0440, USA, JILA, JILA and Department of Physics, University of Colorado at Boulder, Department of Physics and JILA, University of Colorado, Department of Physics and JILA, University of Colorado at Boulder