Stockholm university logo, link to start page
Gå till denna sida på svenska webben

Deependra JadounPhD student

About me

Our group webpage

Publications

A selection from Stockholm University publication database

  • Capturing fingerprints of conical intersection

    2021. Deependra Jadoun, Mahesh Gudem, Markus Kowalewski. Structural Dynamics 8 (3)

    Article

    Many recent experimental ultrafast spectroscopy studies have hinted at non-adiabatic dynamics indicating the existence of conical intersections, but their direct observation remains a challenge. The rapid change of the energy gap between the electronic states complicated their observation by requiring bandwidths of several electron volts. In this manuscript, we propose to use the combined information of different x-ray pump-probe techniques to identify the conical intersection. We theoretically study the conical intersection in pyrrole using transient x-ray absorption, time-resolved x-ray spontaneous emission, and linear off-resonant Raman spectroscopy to gather evidence of the curve crossing.

    Read more about Capturing fingerprints of conical intersection
  • Time-Resolved Photoelectron Spectroscopy of Conical Intersections with Attosecond Pulse Trains

    2021. Deependra Jadoun, Markus Kowalewski. Journal of Physical Chemistry Letters 12 (33), 8103-8108

    Article

    Conical Intersections (CIs), which are believed to be ubiquitous in molecular and biological systems, open up ultrafast nonradiative decay channels. A superposition of electronic states is created when a molecule passes through a CI and the nuclear wave packet branches. The resulting electronic coherence can be considered a unique signature of the CI. The involved electronic states can be resolved in the energy domain with photoelectron spectroscopy using a femtosecond pulse as a probe. However, the observation of the created electronic coherence in the time domain requires probe pulses with several electron volts of bandwidth. Attosecond pulses can probe the electronic coherence but are unable to resolve the involved electronic states. In this Letter, we propose to address this restriction by using time- resolved photoelectron spectroscopy with an attosecond pulse train as a probe. We theoretically demonstrate that the resulting photoelectron spectrum may yield energy resolution as well as the information on the created coherences in the time domain.

    Read more about Time-Resolved Photoelectron Spectroscopy of Conical Intersections with Attosecond Pulse Trains

Show all publications by Deependra Jadoun at Stockholm University