Attosecond electronic dynamics of core-excited states of N2 O in the soft x-ray region

Authors

Nariyuki Saito, The University of Tokyo
Nicolas Douguet, Kennesaw State University
Hiroki Sannohe, The University of Tokyo
Nobuhisa Ishii, Kansai Photon Science Institute
Teruto Kanai, The University of Tokyo
Yi Wu, University of Central Florida
Andrew Chew, University of Central Florida
Seunghwoi Han, University of Central Florida
Barry I. Schneider, National Institute of Standards and Technology
Jeppe Olsen, Aarhus Universitet
Luca Argenti, University of Central Florida
Zenghu Chang, University of Central Florida
Jiro Itatani, The University of Tokyo

Department

Physics

Document Type

Article

Publication Date

12-1-2021

Abstract

We present a combined experimental and theoretical study of the transient absorption spectroscopy of N2O at the N K edge (400 eV) by employing an attosecond soft x-ray pulse and an overlapping intense femtosecond infrared pulse. Our experiment demonstrates that tunnel ionization of the core-excited states of neutral N2O causes prominent half-cycle oscillations in the absorption signal. In addition, we observe the appearance of the N2O+ signal with increasing delay as a result of the tunneling ionization of N2O, thereby allowing us to follow the tunneling process in real time. We have developed theoretical models that allow us to interpret and reproduce the main trends of the experimental data.

Journal Title

Physical Review Research

Journal ISSN

26431564

Volume

3

Issue

4

Digital Object Identifier (DOI)

10.1103/PhysRevResearch.3.043222