Analytic modeling of structures in attosecond transient-absorption spectra

Abstract

Attosecond transient-absorption spectroscopy (ATAS) is an established method for exploring electron dynamics on the subfemtosecond time-scale. ATAS spectra contain certain ubiquitous features, such as oscillating fringes, light-induced structures and hyperbolic sidebands, representing physical processes. We derive closed analytical expressions describing these features, based on a three-level system responding adiabatically to the influence of an infrared field in conjunction with an extreme ultraviolet pulse, and use He to illustrate the theory. The validity of the formulas is substantiated by comparing their predictions with spectra calculated numerically by the time-dependent Schrödinger equation. The closed analytical forms and the details of their derivation resolve the origins of the features.

12 pages, 6 figures

References in corpus (3)

• Theory of Attosecond Transient Absorption Spectroscopy of Krypton for Overlapping Pump and Probe Pulses
• Nuclear-Motion Effects in Attosecond Transient Absorption Spectroscopy of Molecules
• Analysis of interference in attosecond transient absorption in adiabatic condition

Cited by in corpus (6)

• Attosecond transient-absorption spectroscopy of polar molecules
• Attosecond All-Optical Retrieval of Valley Polarization via Circular Dichroism in Transient Absorption
• Attosecond Transient Absorption Spectroscopy without Inversion Symmetry
• Gauge-invariant absorption of light from a coherent superposition of states
• Light-induced states in the transient-absorption spectrum of a periodically pumped strong-field-excited system
• Nonadiabatic effects in attosecond transient absorption spectroscopy