Strong-field ionization of heteronuclear diatomic molecules using an orthogonally polarized two-color laser field

Habibović, Dino; Gazibegović-Busuladžić, A.; Busuladžić, M.; Milošević, D. B.

doi:10.1103/physreva.103.053101

Cited by 14 publications

(14 citation statements)

References 88 publications

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“…This case is illustrated in Figure 3 of [81]. However, this symmetry is broken for a heteronuclear diatomic molecule (see Figure 2 in [82]). Finally, it is important to mention that for some molecular orientations and some values of the field parameters the spectrum can exhibit some additional rotational and/or reflection symmetries.…”

Section: Influence Of the Molecular Symmetry On The Photoelectron Momentum Distributionmentioning

confidence: 98%

“…This question has already been analyzed in detail in [77,78] using the examples of homonuclear diatomic and linear polyatomic molecules exposed to a bicircular field. The same problem was investigated in [81,82] for homonuclear and heteronuclear diatomic molecules in an OTC field. The main conclusions can be summarized as follows.…”

Section: Influence Of the Molecular Symmetry On The Photoelectron Momentum Distributionmentioning

confidence: 99%

“…In addition, the interferences and plateau structures in the HATI spectra of homonuclear diatomic molecules in a bicircular field were analyzed in [80]. More recently, the symmetry properties of the (H)ATI spectra of homonuclear and heteronuclear diatomic molecules in OTC fields were scrutinized in [81,82].…”

Section: Introductionmentioning

confidence: 99%

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Symmetries and Selection Rules of the Spectra of Photoelectrons and High-Order Harmonics Generated by Field-Driven Atoms and Molecules

2021

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Using the strong-field approximation we systematically investigate the selection rules for high-order harmonic generation and the symmetry properties of the angle-resolved photoelectron spectra for various atomic and molecular targets exposed to one-component and two-component laser fields. These include bicircular fields and orthogonally polarized two-color fields. The selection rules are derived directly from the dynamical symmetries of the driving field. Alternatively, we demonstrate that they can be obtained using the conservation of the projection of the total angular momentum on the quantization axis. We discuss how the harmonic spectra of atomic targets depend on the type of the ground state or, for molecular targets, on the pertinent molecular orbital. In addition, we briefly discuss some properties of the high-order harmonic spectra generated by a few-cycle laser field. The symmetry properties of the angle-resolved photoelectron momentum distribution are also determined by the dynamical symmetry of the driving field. We consider the first two terms in a Born series expansion of the T matrix, which describe the direct and the rescattered electrons. Dynamical symmetries involving time translation generate rotational symmetries obeyed by both terms. However, those that involve time reversal generate reflection symmetries that are only observed by the direct electrons. Finally, we explain how the symmetry properties, imposed by the dynamical symmetry of the driving field, are altered for molecular targets.

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Section: Influence Of the Molecular Symmetry On The Photoelectron Momentum Distributionmentioning

confidence: 98%

Section: Influence Of the Molecular Symmetry On The Photoelectron Momentum Distributionmentioning

confidence: 99%

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Symmetries and Selection Rules of the Spectra of Photoelectrons and High-Order Harmonics Generated by Field-Driven Atoms and Molecules

2021

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“…The values of the equilibrium internuclear distance, for these molecules, are R 0 N 2 = 2.068 au, R 0 O 2 = 2.282 au, R 0 C 2 = 2.348 au, and R 0 CO = 2.132 au, respectively, while the corresponding values of the ionization potential are I p N 2 = 15.58 eV, I p O 2 = 12.03 eV, I p C 2 = 11.41 eV, and I p CO = 14.014 eV, respectively. Other parameters can be found in refs , . First, we devote our attention to the case of a monochromatic field.…”

Section: Resultsmentioning

confidence: 99%

“…For a diatomic molecule with the initial state i and equilibrium internuclear vector R 0 , exposed to a T -periodic field, the differential ionization rate for the emission of the photoelectron with momentum p is where the T -matrix element has the following form: The contributions and correspond to the direct and rescattered electrons, respectively, and their explicit forms are given in ref for homonuclear and in ref for heteronuclear diatomic molecules. Moreover, is given by where U p is the ponderomotive energy, A ( t ) = −∫ t E ( t ′)d t ′ is the vector potential, and n = n 1 r + n 2 s , with n 1 and n 2 being the numbers of absorbed photons of frequencies r ω and s ω, respectively, such that the energy-conservation condition is satisfied, i.e., n ω = E p + U p + I p , E p = p 2 /2 being the photoelectron energy and I p being the ionization potential.…”

Section: Theorymentioning

confidence: 99%

Elliptic Dichroism in the Above-Threshold Ionization of Molecules Induced by a Strong Laser Field

Habibović,

Gazibegović-Busuladžić,

Busuladžić

et al. 2023

J. Phys. Chem. A

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Using a strong-field-approximation theory, we investigate the high-order above-threshold ionization of diatomic molecules exposed to the monochromatic and bichromatic elliptically polarized fields. We devote particular attention to the difference between the photoelectron momentum distributions obtained with fields with opposite helicity. This difference is quantified using the elliptic-dichroism parameter, which represents the normalized difference between the differential ionization rates calculated with driving fields with opposite helicity. We find that this parameter strongly depends on the molecular orientation with respect to the laser field. In addition, this dependence is different for molecules with different types of highest-occupied molecular orbital. In other words, we show that the molecular structure is imprinted onto the elliptic-dichroism parameter for both monochromatic and bichromatic driving fields. This is explained by analyzing the interferences between various partial contributions to the differential ionization rate. In this way, elliptic dichroism also serves as a tool to analyze the electron dynamics. Finally, for heteronuclear diatomic molecules, we show that the elliptic dichroism is different from zero even for the direct electrons, i.e., the electrons that after liberation go directly to the detector. In this case, the dependence on the molecular orientation is far more pronounced for a bichromatic driving field.

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High-order harmonic generation from aligned HCN molecules under orthogonally and linearly polarized two-color laser fields

Koushki

2023

J Mol Model

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Strong-field ionization of heteronuclear diatomic molecules using an orthogonally polarized two-color laser field

Cited by 14 publications

References 88 publications

Symmetries and Selection Rules of the Spectra of Photoelectrons and High-Order Harmonics Generated by Field-Driven Atoms and Molecules

Symmetries and Selection Rules of the Spectra of Photoelectrons and High-Order Harmonics Generated by Field-Driven Atoms and Molecules

Elliptic Dichroism in the Above-Threshold Ionization of Molecules Induced by a Strong Laser Field

High-order harmonic generation from aligned HCN molecules under orthogonally and linearly polarized two-color laser fields

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