Generation of elliptically polarized soft x rays using high-order harmonic generation with orthogonal two-color laser fields. (March 2020)

• Record Type: Journal Article
• Authors: Milošević, D B; Becker, W
• Is Part Of: Journal of physics. Volume 1508(2020)
• Publication Date: 2020-03
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1508/1/012001
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: High-order harmonic generation by orthogonally polarized two-color (OTC) laser fields is analysed using strong-field approximation and quantum-orbit theory. Results for the field components frequency ratio of 2:1 and 3:1 are presented and compared. We have shown that, depending on the relative phase between the field components, the shape of the high-harmonic spectrum can be very different from that obtained by a monochromatic linearly polarized laser field. It is also shown that it is possible to generate elliptically polarized high-order harmonics with very high photon energies using OTC laser field with the frequency ratio of 3:1 and a long fundamental wavelength. An effective relative phase control of the harmonic emission is demonstrated. The obtained results are explained using the quantum-orbit theory.