University of Illinois Urbana-Champaign

Ultrafast XUV spectroscopy to probe conical intersections and excited state dynamics

Sandhu, Arvinder

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1328540.pptx
3620.pdf

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https://hdl.handle.net/2142/104253

Description

Title
Ultrafast XUV spectroscopy to probe conical intersections and excited state dynamics
Author(s)
Sandhu, Arvinder
Issue Date
2019-06-19
Keyword(s)
High-harmonic generation and XUV spectroscopy
Date of Ingest
  • 2019-07-15T22:16:30Z
  • 2020-01-25T19:30:03Z
Abstract
\begin{wrapfigure}{l}{0pt} \includegraphics[scale=0.3]{Conical.eps} \end{wrapfigure} Femtosecond and attosecond XUV spectroscopy was used to study of electron dynamics stemming from many-body interactions, including the coupling between the electronic and nuclear degrees of freedom, electronic correlations, external light fields, or a combination thereof. \footnote{This work was supported by the U. S. Army Research Laboratory and the U. S. Army Research Office under grant number W911NF-14-1-0383 and the National Science Foundation (NSF) award number PHY-1505556.} Conical intersections are an important topic of investigation because they serve as nature’s energy funnels in many biochemical processes, e.g. vision, light harvesting, etc. We focused on nuclear motion mediated evolution of an electron hole near a conical intersection in a CO$_2$ ion. Using pump-probe photodissociation spectroscopy, we made quantitative measurements of electronic couplings and monitored the role of decoherence in such dynamics, thereby probing the fundamental mechanisms responsible for the charge and energy redistribution in molecules. In another study, time resolved XUV photoelectron spectroscopy was applied to identify the role of multi electron excitations in the ultrafast Rydberg state dissociation of highly excited states in O$_2$. The talk will also discuss new opportunities arising the application of attosecond soft-x-ray sources.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/104253
DOI
https://doi.org/10.15278/isms.2019.WK01
Copyright and License Information
Copyright 2019 Arvinder Sandhu

Owning Collections

Abstracts & Presentations - 2019 International Symposium on Molecular Spectroscopy PRIMARY