Open AccessPropagation effects in the generation process of high-order vortex harmonics
Author(s) -
Chaojin Zhang,
Erheng Wu,
Mingliang Gu,
Chengpu Liu
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.021241
Subject(s) - harmonics , physics , vortex , optical vortex , optics , high harmonic generation , classical mechanics , computational physics , quantum mechanics , laser , mechanics , voltage
We numerically study the propagation of a Laguerre-Gaussian beam through polar molecular media via the exact solution of full-wave Maxwell-Bloch equations where the rotating-wave and slowly-varying-envelope approximations are not included. It is found that beyond the coexistence of odd-order and even-order vortex harmonics due to inversion asymmetry of the system, the light propagation effect results in the intensity enhancement of a high-order vortex harmonics. Moreover, the orbital momentum successfully transfers from the fundamental laser driver to the vortex harmonics which topological charger number is directly proportional to its order.