QUANTUM BATTLES 2020
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Atto Fridays 

Seminar Series


​16 April 2021

Strong-field induced processes in complex laser fields

Dejan B. Milošević
Faculty of Science, University of Sarajevo, Academy of Sciences and Arts of Bosnia and Herzegovina

milo@bih.net.ba
 
​
​I will present some recent results for strong-laser-field induced processes in complex laser fields. By complex fields I mean the fields which are different from a linearly polarized monochromatic periodic field. Examples are elliptically polarized field, bicircular field, orthogonally polarized two-color field (OTC), and few-cycle pulse [1]. Polarization of high-order harmonics generated by atoms or molecules can be controlled using the OTC field [2-4]. Angle-resolved photoelectron spectra in above-threshold ionization by OTC field exhibit particular symmetries [1,5]. Theoretical methods used to consider these processes include
improved strong-field approximation, quantum-orbit theory, and solutions of the time-dependent Schrödinger equation [6]. Particular attention will be devoted to recently discovered trifurcation in phase-dependent asymmetry in high-order above-threshold ionization of cesium atoms by 3100 nm few-cycle laser pulses and explanations in terms of time-domain holography [7].

[1] A. Jašarević, E. Hasović, R. Kopold, W. Becker, and D. B. Milošević, Application of the saddle-point method to strong-laser-field ionization, J. Phys. A: Math. Theor. 53, 125201 (2020)

[2] D. B. Milošević and W. Becker, X-ray harmonic generation by orthogonally polarized two-color fields: Spectral shape and polarization, Phys. Rev. A 100, 031402(R) (2019)

[3] D. B. Milošević and W. Becker, High-order harmonic generation by bi-elliptical orthogonally polarized two-color fields, Phys. Rev. A 102, 023107 (2020)

[4] D. Habibović and D. B. Milošević, Ellipticity of high-order harmonics generated by aligned homonuclear diatomic molecules exposed to an orthogonal two-color laser field, Photonics 7, 110 (2020)

[5] D. Habibović, A. Gazibegović-Busuladžić, M. Busuladžić, A. Čerkić, and D. B. Milošević, Strong-field ionization of homonuclear diatomic molecules using orthogonally polarized two-color laser fields, Phys. Rev. A 102, 023111 (2020)

[6] B. Fetić, W. Becker, and D. B. Milošević, Extracting photoelectron spectra from the time-dependent wave function: Comparison of the projection onto continuum states and window-operator methods, Phys. Rev. A 102, 023101 (2020)

[7] M. Kübel, P. Wustelt, Y. Zhang, S. Skruszewicz, D. Hoff, D. Würzler, H. Kang, D. Zille, D. Adolph, G. G. Paulus, A. M. Sayler, M. Dumergue, A. Nayak, R. Flender, L. Haizer, M. Kurucz, B. Kiss, S. Kühn, B. Fetić, and D. B. Milošević, High-Order Phase-Dependent Asymmetry in the Above-Threshold Ionization Plateau, Phys. Rev. Lett. 126, 113201 (2021)
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  • Home
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