Photo-Ionization of Noble Gases: A Demonstration of Hybrid Coupled Channels Approach

Vinay Majety,Armin Scrinzi

doi:10.3390/photonics2010093

Vinay Majety, Armin Scrinzi

Open Access

https://doi.org/10.3390/photonics2010093

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Journal: Photonics	Publication Date: Jan 16, 2015
Citations: 35	License type: CC BY 4.0

Affiliation: Ludwig-Maximilians-Universität München

Abstract

We present here an application of the recently developed hybrid coupled channels approach to study photo-ionization of noble gas atoms: Neon and Argon. We first compute multi-photon ionization rates and cross-sections for these inert gas atoms with our approach and compare them with reliable data available from R-matrix Floquet theory. The good agreement between coupled channels and R-matrix Floquet theory show that our method treats multi-electron systems on par with the well established R-matrix theory. We then apply the time dependent surface flux (tSURFF) method with our approach to compute total and angle resolved photo-electron spectra from Argon with linearly and circularly polarized 12 nm wavelength laser fields, a typical wavelength available from Free Electron Lasers (FELs).

Highlights

IntroductionThis method in conjunction with the time dependent surface flux method [17,18] can compute accurate single photo-electron spectra
We find that our results are in good agreement with the R-matrix Floquet (RMF) calculations
We find that our hybrid anti-symmetrized coupled channels (haCC) computations are in very good agreement with the RMF results

Summary

Introduction

This method in conjunction with the time dependent surface flux method [17,18] can compute accurate single photo-electron spectra. We present here an application of our method to study photo-ionization from noble gas atoms-Neon and Argon. We find that our results are in good agreement with the R-matrix Floquet (RMF) calculations This shows that our method treats ionization of multi-electron systems on par with the well established R-matrix theory. The results presented here are the first steps to computing photo-electron spectra at long wavelengths that are currently inaccessible from any theoretical approach that considers multi-electron effects

Hybrid Coupled Channels Method

One- and Two-Photon Cross-Sections of Neon

Five-Photon Ionization Rates from Argon

Photo-Electron Spectra from Argon with 12 nm Wavelength Laser Fields

Conclusions