Extreme Ultraviolet Wave Packet Interferometry of the Autoionizing HeNe Dimer

• Femtosecond extreme ultraviolet wave packet interferometry (XUV-WPI) was applied to study resonant interatomic Coulombic decay (ICD) in the HeNe dimer. The high demands on phase stability and sensitivity for vibronic XUV-WPI of molecular-beam targets are met using an XUV phase-cycling scheme. The detected quantum interferences exhibit vibronic dephasing and rephasing signatures along with an ultrafast decoherence assigned to the ICD process. A Fourier analysis reveals the molecular absorption spectrum with high resolution. The demonstrated experiment shows a promising route for the real-time analysis of ultrafast ICD processes with both high temporal and high spectral resolution. © 2022 American Chemical Society.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

Absorption spectroscopy

Fourier analysis

Interferometry

Molecular beams

Spectral resolution

Wave packets

Autoionizing

Decay process

Extreme Ultraviolet

Femtoseconds

High demand

Interatomic Coulombic decay

Phase cycling

Ultra-fast

Vibronics

Wave packet interferometries

Dimers

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