CC BY 3.0 UnportedMilošević, D.B.Becker, W.2021-11-182021-11-182020https://oa.tib.eu/renate/handle/123456789/7343https://doi.org/10.34657/6390High-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. © Published under licence by IOP Publishing Ltd.enghttps://creativecommons.org/licenses/by/3.0/530orthogonally polarized two-color (OTC) laserlasersquantum-orbit theoryArticle