Complete determination of the state of elliptically polarized light by electron-ion vector correlations

Veyrinas, K.; Elkharrat, C.; Poullain, Sonia Marggi; Saquet, Nicolas; Dowek, D.; Lucchese, Robert R.; Garcı́a, Gustavo; Nahon, Laurent

doi:10.1103/physreva.88.063411

Cited by 20 publications

(32 citation statements)

References 36 publications

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“…As pointed out previously [10,14], the analytical expression of the MFPAD also encodes the complete polarization state of the ionizing radiation in terms of the normalized Stokes parameters 1 2 3 ( , , ) s s s , where 1 2 ( , ) s s and 3 ( ) s characterize the linearly and circularly polarized intensities, respectively, and P s s s = + + is the degree of polarization [15]. This remarkable property underlies the 'molecular polarimetry' (MP) method [16] which is tunable and available over a spectral range spanning from VUV to x-ray photon energies [14,17,18], where polarimetry is a challenging task. We recently applied the MP method to retrieve the complete polarization state of individual high-order harmonics (HHs) in an attosecond pulse train (APT) produced by the HHG-based XUV source of the PLFA facility of CEA-Saclay [19], for different schemes involving symmetry breaking in the generation process [20,21].…”

Section: Introductionmentioning

confidence: 99%

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Dissociative photoionization of NO across a shape resonance in the XUV range using circularly polarized synchrotron radiation

Veyrinas

Saquet

Poullain

et al. 2019

The Journal of Chemical Physics

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We report benchmark results for dissociative photoionization (DPI) spectroscopy and dynamics of the NO molecule in the region of the σ* shape resonance in the ionization leading to the NO + (c 3 Π) ionic state. The experimental study combines well characterized XUV circularly polarized synchrotron radiation (SR), delivered at the DESIRS beamline (SOLEIL), with ionelectron coincidence 3D momentum spectroscopy. The measured (N + , e) kinetic energy correlation diagrams reported at four discrete photon energies in the extended 23-33 eV energy range allow for resolving the different active DPI reactions, and indicate the importance of spectrally-resolved studies using SR in the context of time-resolved studies where PI is induced by broadband XUV attosecond pulses. In the dominant DPI reaction which leads to the NO + (c 3 Π) ionic state, PI dynamics across the σ* shape resonance are probed by molecular frame photoelectron angular distributions where the parallel and perpendicular transitions are highlighted, as well as the circular dichroism CDAD(θ e ) in the molecular frame. The latter also constitute benchmark references for molecular polarimetry. The measured dynamical parameters are well described by multichannel Schwinger configuration interaction calculations. Similar results are obtained for the DPI spectroscopy of highly excited NO + electronic states populated in the explored XUV photon energy range.

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Section: Introductionmentioning

confidence: 99%

“…For these experiments, we chose process (I) which possesses fingerprint properties to act as an efficient 'polarimeter'. As MP requires the knowledge of the CDAD [16], the results reported in the present manuscript can be taken as references.…”

Section: Introductionmentioning

confidence: 99%

Dissociative photoionization of NO across a shape resonance in the XUV range using circularly polarized synchrotron radiation

Veyrinas

Saquet

Poullain

et al. 2019

The Journal of Chemical Physics

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“…This would be a complementary approach from the molecular polarimetry data deduced from molecular--frame photoelectron angular distributions (MF--PADs), recently demonstrated 63 and valid in the dissociative ionization continuum range of small molecules, i.e., above 20 eV or so. We therefore hope in this context, to contribute to the expansion of the active field of polarization dependent short wavelength photodynamics with short pulses.…”

Section: Conclusion and Future Prospectsmentioning

confidence: 99%

Determination of accurate electron chiral asymmetries in fenchone and camphor in the VUV range: sensitivity to isomerism and enantiomeric purity

Nahon

Nag

Garcia

et al. 2016

Phys. Chem. Chem. Phys.

122

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Ivan (2016) Determination of accurate electron chiral asymmetries in fenchone and camphor in the VUV range: sensitivity to isomerism and enantiomeric purity. Physical Chemistry Chemical Physics . ISSN 1463-9084 Access from the University of Nottingham repository: http://eprints.nottingham.ac.uk/32734/1/PECD_PCCP2016_Accepted_manuscript.pdf Copyright and reuse:The Nottingham ePrints service makes this work by researchers of the University of Nottingham available open access under the following conditions. This article is made available under the University of Nottingham End User licence and may be reused according to the conditions of the licence. For more details see: http://eprints.nottingham.ac.uk/end_user_agreement.pdf A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk This is an Accepted Manuscript, which has been through the Royal Society of Chemistry peer review process and has been accepted for publication.Accepted Manuscripts are published online shortly after acceptance, before technical editing, formatting and proof reading. Using this free service, authors can make their results available to the community, in citable form, before we publish the edited article. We will replace this Accepted Manuscript with the edited and formatted Advance Article as soon as it is available.You can find more information about Accepted Manuscripts in the Information for Authors.Please note that technical editing may introduce minor changes to the text and/or graphics, which may alter content. Photoelectron circular dichroism (PECD) manifests itself as an intense forward/backward asymmetry in the angular distribution of photoelectrons produced from randomly--oriented enantiomers by photoionization with circularly--polarized light (CPL). As a sensitive probe of both photoionization dynamics and of the chiral molecular potential, PECD attracts much interest especially with the recent performance of related experiments with visible and VUV laser sources. Here we report, by use of quasi--perfect CPL VUV synchrotron radiation and using a double imaging photoelectron/photoion coincidence (i 2 PEPICO) spectrometer, new and very accurate values of the corresponding asymmetries on showcase chiral isomers: camphor and fenchone. These data have additionally been normalized to the absolute enantiopurity of the sample as measured by a chromatographic technique. They can therefore be used as benchmarking data for new PECD experiments, as well as for theoretical models. In particular we found, especially for the outermost orbital of both molecules, a good agreement with CMS--Xα PECD modeling over the whole VUV range. We also report a spectacular sensitivity of PECD to isomerism for slow electrons, ...

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“…The original method and results of Ref. 228 was developed further to completely characterize the state of elliptically-polarized light by electron-ion vector correlations [238], and finally to realise the complete polarimetry of high harmonics [239]. These methods have recently been applied to HHG generated under O. Cohen's 'bicircular' fields [240], providing a clear evidence for depolarization of high harmonics.…”

Section: H Polarization Effectsmentioning

confidence: 99%

Symphony on strong field approximation

et al. 2019

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In the last three decades, we have witnessed incredible advances in laser technology and in the understanding of nonlinear laser-matter interactions, crowned recently by the award of the Nobel prize to Gérard Mourou and Donna Strickland [1,2]. It is now routinely possible to produce few-cycle femtosecond (1 fs = 10 −15 s) laser pulses in the visible and mid-infrared regimes [3,4]. By focusing such ultrashort laser pulses on gas or solid targets, possibly in a presence of nano-structures [5], the targets are subjected to an ultra-intense electric field, with peak field strengths approaching the binding field inside the atoms themselves. Such fields permit the exploration of the interaction between strong electromagnetic coherent radiation and an atomic or molecular system with unprecedented spatial and temporal resolution [6]. On one hand, HHG nowadays can be used to generate attosecond pulses in the extreme ultraviolet [7,8], or even in the soft X-ray regime [9]. Such pulses themselves may be used for dynamical spectroscopy of matter; despite carrying modest pulse energies, they exhibit excellent coherence properties [10,11]. Combined with femtosecond pulses they can also be used to extract information about the laser pulse electric field itself [12]. HHG sources therefore offer an important alternative to other sources of XUV and X-ray radiation: synchrotrons, free electron lasers, X-ray lasers, and laser plasma sources. Moreover, HHG pulses can provide information about the structure of the target atom, molecule or solid [13][14][15]. Of course, to decode such information from a highly nonlinear HHG signal is a challenge, and that is why a possibly perfect, and possibly "as analytical as possible" theoretical understanding of these processes is in high demand. Here is the first instance where SFA offers its basic services.Since electronic motion is governed by the waveform of the laser electric field, an important quantity to describe the electric field shape is the so-called absolute phase or carrier-envelope phase (CEP). Control over the CEP is paramount for extracting information about electron dynamics, and to retrieve structural information from atoms and molecules [13,16,17]. For instance, in HHG an electron is liberated from an atom or molecule through ionization, which occurs close to the maximum of the electric field. Within the oscillating field, the electron can thus accelerate along oscillating trajectories, which may result in recollision with the parent ion, roughly when the laser field approaches a zero value. Control over the CEP is particularly important for HHG, when targets are driven by laser pulses comprising only one or two optical cycles. In that situation the CEP determines the relevant electron trajectories, i.e. the CEP determines whether emission results in a single or in multiple attosecond bursts of radiation [16,18].The influence of the CEP on electron emission is also extremely important. It was demonstrated for instance in an anti-correlation experiment, in which the number of AT...

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Complete determination of the state of elliptically polarized light by electron-ion vector correlations

Cited by 20 publications

References 36 publications

Dissociative photoionization of NO across a shape resonance in the XUV range using circularly polarized synchrotron radiation

Dissociative photoionization of NO across a shape resonance in the XUV range using circularly polarized synchrotron radiation

Determination of accurate electron chiral asymmetries in fenchone and camphor in the VUV range: sensitivity to isomerism and enantiomeric purity

Symphony on strong field approximation

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