Enhanced narrow-bandwidth emission during high-order harmonic generation from aligned molecules
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Updated: May 13, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
Chaojin Zhang1, Jinping Yao, Fadhil A Umran
1School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China. chaojinzhang@163.com
Abstract:
We theoretically investigate the selective enhancement of high-harmonic generation (HHG) in a small spectral range when an orthogonal-polarized two-color laser field interacts with aligned O(2) molecules. It is shown clearly that the enhanced narrow-bandwidth emission near the cutoff of the HHG spectrum can be effectively controlled by the molecular alignment angle, laser intensity and the relative phase of two-color laser fields. Furthermore, the strong dependence of narrow-bandwidth HHG on molecular alignment angle indicates that it encodes information about O(2) molecular orbitals, so it may be an alternative method for reconstruction of O(2) molecular orbitals.
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