Abstract
High-order-harmonic generation is investigated for and with and without a Born-Oppenheimer approximation by a numerical solution of a full dimensional electronic time-dependent Schrödinger equation under four-cycle intense laser pulses of 800 nm wavelength and , 5, 7, and intensities. For most harmonic orders, the intensity obtained for is higher than that for , and the yield difference increases as the harmonic order increases. Only at some low harmonic orders, generates more intense harmonics compared to . The results show that nuclear motion, ionization probability, and system dimensionality must be simultaneously taken into account to properly explain the isotopic effects on high-order-harmonic generation and to justify experimental observations.
- Received 22 July 2014
- Revised 30 August 2014
DOI:https://doi.org/10.1103/PhysRevA.90.043411
©2014 American Physical Society