Alignment Dependence of High-Order Harmonic Generation from CO₂

Abstract

High-order harmonic generation (HHG) from aligned CO₂ is studied within the framework of the strong-field approximation (SFA). Our results are in qualitative agreements with recent pump-probe experiments. The experimentally observed inverted modulation in HHG signals as a function of pump-probe delay time has previously been attributed to the quantum interference from the two oxygen centres. Our results, however, indicate that this is not necessary for the inverted modulation. The angular dependence of the HHG and the evolution of the HHG yield as functions of delay time are influenced strongly by the depletion of the ground state and, therefore, are sensitive to the probe laser intensity.

Department(s)

Physics

Keywords and Phrases

Approximation Theory; Carbon Dioxide; Function Evaluation; Ground State; Quantum Theory; Time Delay, Alignment Dependence; Angular Dependence; Oxygen Centres; Pump-Probe Experiments; Qualitative Agreements; Quantum Interference; Strong-Field Approximation (SFA), Harmonic Generation

International Standard Serial Number (ISSN)

0950-0340

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2007 Taylor & Francis, All rights reserved.

Publication Date

01 May 2007

Link to Full Text

Share

 
COinS