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

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

2010-02-17

arxiv.org/abs/1002.3384v1

Phys. Rev. A 82, 023814 (2010)

Physics

Atomic Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevA.82.023814

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.

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