Polarization and ellipticity of high-order harmonics from aligned molecules generated by linearly polarized intense laser pulses

Abstract

We present theoretical calculations for polarization and ellipticity of high-order harmonics from aligned N${}_2$, CO${}_2$, and O${}_2$ molecules generated by linearly polarized lasers. Within the rescattering model, the two polarization amplitudes of the harmonics are determined by the photo-recombination amplitudes for photons emitted parallel and perpendicular to the direction of the {\em same} returning electron wave packet. Our results show clear species-dependent polarization states, in excellent agreement with experiments. We further note that the measured polarization ellipse of the harmonic furnishes the needed parameters for a "complete" experiment in molecules.

4 pages, 4 figures

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• Accurate retrieval of structural information from laser-induced photoelectron and high-harmonic spectra by few-cycle laser pulses
• Quantitative Rescattering Theory for high-order harmonic generation from molecules
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Cited by in corpus (2)

• Separation of Target Structure and Medium Propagation Effects in High-Harmonic Generation
• Analysis of effects of macroscopic propagation and multiple molecular orbitals on the minimum in high-order harmonic generation of aligned CO${}_2$