Femtosecond transparency in the extreme ultraviolet

Abstract

Electromagnetically induced transparency-like behavior in the extreme ultraviolet (XUV) is studied theoretically, including the effect of intense 800 nm laser dressing of He 2s2p (1Po) and 2p^2 (1Se) autoionizing states. We present an ab initio solution of the time-dependent Schrodinger equation (TDSE) in an 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 encouraging agreement with experiment.

25 pages, 7 figures, 1 table

References in corpus (6)

• Transient absorption and reshaping of ultrafast XUV light by laser-dressed helium
• Femtosecond induced transparency and absorption in the extreme ultraviolet by coherent coupling of the He 2s2p (1P0) and 2p2 (1Se) double excitation states with 800 nm light
• Electromagnetically induced transparency for x rays
• Ionization branching ratio control with a resonance attosecond clock
• Cross sections for short pulse single and double ionization of helium
• Laser-assisted-autoionization dynamics of helium resonances with single attosecond pulses

Cited by in corpus (16)

• Strong-Field Many-Body Physics and the Giant Enhancement in the High-Harmonic Spectrum of Xenon
• Quantum interference in attosecond transient absorption of laser-dressed helium atoms
• Theory of Attosecond Transient Absorption Spectroscopy of Krypton for Overlapping Pump and Probe Pulses
• First-principles nonequilibrium Green's function approach to transient photoabsorption: Application to atoms
• Calculation of photoelectron spectra within the time-dependent configuration interaction singles scheme
• Some Exact Properties of the Nonequilibrium Response Function for Transient Photoabsorption
• Absorption and emission of single attosecond light pulses in an autoionizing gaseous medium dressed by a time-delayed control field
• Atomic and molecular dynamics triggered by ultrashort light pulses on the atto- to picosecond time scale
• Autoionizing Polaritons in Attosecond Atomic Ionization
• Controlling the $2p$ Hole Alignment in Neon via the $2s$-$3p$ Fano Resonance
• An optimized absorbing potential for ultrafast, strong-field problems
• Probing dipole-forbidden autoionizing states by isolated attosecond pulses
• Resonant enhancement of a single attosecond pulse in a gas medium by a time-delayed control field
• Non-adiabatic molecular association in thermal gases driven by radio-frequency pulses
• Interferometry of Efimov states in thermal gases by modulated magnetic fields
• Control of valence-electron motion in Xe cations using the stimulated-Raman-adiabatic-passage technique