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Past seminars


Past seminars

Methane dissociation on Ni(111) and Pt(111): The effects of lattice motion and relaxation on reactivity

Sven Nave (Université Paris-Sud XI)

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When: Wed January 25 2012 16:30 - 17:30

Interferences in vibrationally resolved molecular photoelectron spectroscopy

Etienne Plésiat

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When: Wed May 23 2012 16:30 - 17:30

Polyatomic molecules in laser fields

Albert Stolow (National Research Council, Ottawa, Canada)

When: Wed August 29 2012 16:30 - 17:30

Attosecond time delay spectroscopy of the hydrogen molecule

Anatoli Kheifets (The Australian National University, Canberra, Australia)

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When: Tue September 4 2012 16:30 - 17:30

Autoionization dynamics of molecular hydrogen using XUV and IR pulses

Alexander Sperl (Max Planck Institut für Kernphysik, Heidelberg, Germany)

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When: Wed October 3 2012 16:30 - 17:30

Attosecond Transient Absorption Spectroscopy of doubly excited states in helium

Luca Argenti

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When: Mon October 15 2012 16:30 - 17:30

Dynamics and dimension - molecules and surfaces

Roar A. Olsen (SINTEF Materials and Chemistry, Oslo)

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When: Tue October 23 2012 16:30 - 17:30

Pushing for chemical accuracy in molecule-surface interactions: H2 interacting with metal surfaces

Geert-Jan Kroes (Leiden Insitute of Chemistry)

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When: Mon October 29 2012 11:15 - 12:15

Electron and nuclear dynamics of H2+ induced by intense ultrashort laser pulses

Rui Silva

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When: Mon November 5 2012 12:15 - 13:15

Porphyrins and Phthalocyanines: A Molecular View of their Potential Applications

Gloria Cárdenas

When: Mon November 26 2012 11:30 - 12:30

The RABITT technique to study strong field effects and continuum-continuum transitions in Helium

Álvaro Jiménez

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When: Mon December 10 2012 11:30 - 12:30

Control of molecular dynamics under strong laser fields

Jesús González-Vázquez

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When: Mon February 4 2013 11:00 - 12:00

Infrared Spectra of Alkyl Mercury Compounds

Merche Montero

When: Mon February 18 2013 11:00 - 12:00

Charge transfer between molecules and ultrathin insulating films deposited on metal surfaces

Maitreyi Robledo

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When: Mon March 4 2013 16:30 - 17:30

The role of intramolecular scattering in K-shell photoionization

David Ayuso

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When: Tue March 19 2013 16:30 - 17:30

Reactivity of doubly charged cations in the gas phase: insight from chemical dynamics and statistical approaches

Ana Martín Sómer

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When: Wed April 10 2013 16:30 - 17:30

Search for neutral and multiply charged coronene in the interstellar medium: a theoretical study

Chiara Paris

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When: Mon April 22 2013 16:30 - 17:30
Where: Módulo 13, Aula 405

Helium mediated deposition: Modeling the He-TiO2(110) interaction potential and application to the collision of a helium droplet from density functional calculations

Néstor Aguirre

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When: Mon May 6 2013 15:30 - 16:30

Theoretical insight into Singlet Oxygen Generation Mechanism in Standard and Oxygen Carrier Photosensitizers

Lara Martínez

When: Mon May 20 2013 15:30 - 16:30

Theoretical study on the fragmentation dynamics of L-Alanine2+

Estefanía Rossich

When: Mon June 3 2013 15:30 - 16:30

GridTDSE: A parallel code for Cartesian coordinate-based wave packet propagations in QMD. The case of hydrogen confined in SWCNTs

Jaime Suárez

When: Mon June 17 2013 15:30 - 16:30

Environment-driven reactivity of H2 on PdRu surface alloys

Cristina Díaz

When: Mon October 7 2013 15:30 - 16:30

Ultrafast wave packet dynamics in molecules clocked and induced by few-cycle UV pulses

Alicia Palacios

When: Mon October 21 2013 15:30 - 16:30

Formation dynamics of dumbbell fullerene dimers C118, C119 and C120 upon collisions between particle projectile and clusters of C60 molecules

Yang Wang

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When: Mon November 4 2013 15:30 - 16:30

A mixed B-splines and Gaussian basis for the accurate description of continuum states

Carlos Marante

When: Mon November 18 2013 15:30 - 16:30

Mechanical properties of epitaxial graphene on metallic surfaces

Daniele Stradi

When: Mon December 2 2013 15:30 - 16:30

A brief (hi)story on core hole calculations

Inés Corral

When: Mon December 16 2013 16:00 - 17:00

High-harmonic generation from the H2+ molecule

Fernando Martín

When: Mon January 13 2014 15:30 - 16:30

Fragmentations of amino acids in gas phase after ionization

Dariusz Grzegorz

When: Mon January 27 2014 15:30 - 16:30

Acrylonitrile adsorbed on Cu(100) and on Cu(100) previously coated with NaCl: Static and dynamics DFT study

Maitreyi Robledo

When: Mon February 10 2014 15:30 - 16:30

Collision induced dissociation in doubly charged cations

Ana Martín Sómer

When: Mon February 24 2014 15:30 - 16:30

Dynamics and control of open quantum systems: Charge transfer at an heterojunction and control of an isomerization

Aurélie Chenel
(Université de Paris Sud)

When: Mon March 3 2014 15:30 - 16:30

Diffraction of H and H2 from LiF

Alberto Sánchez Muzas

When: Mon March 10 2014 15:30 - 16:30

The position spread tensor behavior in molecules

Oriana Brea

When: Mon March 24 2014 15:30 - 16:30

Statistical fragmentation of molecular clusters

Néstor Aguirre

When: Mon April 7 2014 15:30 - 16:30

Rainbows, fast atoms, and surfaces

Helmut Winter (Institut für Physik der Humboldt-Universität, Berlin)

When: Tue May 6 2014 15:30 - 16:30

Structure and fragmentation of hydrogenated carbon clusters

Juan Pablo Sánchez

When: Mon May 26 2014 15:30 - 16:30

Electronic Structure Methods for Large Molecules and Novel Applications in Nanoscience

Krishnan Raghavachari (Department of Chemistry, sIndiana University)

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When: Tue September 30 2014 15:30 - 16:30
Where: Módulo 8, Aula 202

Ultrafast charge migration in phenylalanine initiated by attosecond pulses

David Ayuso

When: Mon October 20 2014 15:30 - 16:30

Modulation of attosecond beating in resonant two-photon ionization

Álvaro Jiménez

When: Mon November 3 2014 16:30 - 17:30

Molecular growth processes in Polycyclic Aromatic Hydrocarbon (PAH) clusters

Michael Gatchell (Stockholm University &
AlbaNova University Center)

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When: Tue November 11 2014 15:30 - 16:30

New simplied model to predict the stability of charged fullenes

Manuel Alcamí

When: Mon November 17 2014 15:30 - 16:30

Electron-Ion coincidence technique in photofragmentation studies

Dang Trinh Ha

When: Mon December 1 2014 15:30 - 16:30

Non adiabatic effects and symmetry breaking explained with a nutshell in a matchbox

José Luis Sanz-Vicario (Univ. Antioquía, Colombia)

When: Mon December 15 2014 15:30 - 16:30

X-ray AMO Physics at XFELs

Antonio Picón (Argonne National Laboratory, USA)

When: Thu December 18 2014 15:30 - 15:30

Around ferrocene and interacting ferrocenyl units

Mª Merced Montero

When: Mon January 26 2015 15:30 - 16:30

Ionization and Dynamics of Halomethanes

Pedro Fernández

When: Wed January 15 2020 15:00 - 15:45
Where: Departamento de Química, Modulo 13. Sala de Seminatios, 5ª Planta

Time resolved photoemission from dichalcogenides

Marcelo Ambrosio
Departamento de Química

When: Wed January 29 2020 15:00 - 16:00
Where: Modulo 13, 5ª planta (Facultad de Ciencias)

DNA+Light: From intrinsic photostability of nucleic acid bases to modifications that enable treatment of skin cancer cells.

Carlos E. Crespo-Hernández
Department of Chemistry
Case Western Reserve University

Abstract: DNA is the carrier of genetic information for almost every organism on Earth. Remarkably, the genetic alphabet is composed of only four nucleobases, which is a prominent example of the narrow selection of organic molecules forming the basis of life. Multiple selection pressures that operated during early chemical and biological evolution have been proposed as the driving force for the selection of the contemporary nucleobases. Above all, there must have been an extreme selection pressure for protection against intense ultraviolet radiation, and photostability was likely a decisive criterion giving some heterocycle analogues a selective advantage for their incorporation into the first informational polymers. Emphasis in this area by our research group has recently focused toward elucidating the structural and electronic elements that regulate DNA photostability, and applying this fundamental information to advance nucleic acid derivatives for photo-therapeutic and structural-biology applications. Importantly, understanding how functionalization regulates the electronic relaxation pathways in nucleic acid bases can assist in the development of therapeutic drugs, crosslinking agents, and fluorescent biomarkers. It may also hold the key for understanding the molecular origins of life. In this presentation, I will show that fundamental physicochemical investigations can be used to develop analogues of the canonical DNA and RNA nucleobases exhibiting more than 100 nm redshifted absorption spectra and nearly 100% greater photoreactivity, which, when applied in vitro with a low dose of light, substantially decrease the proliferation of skin cancer cells.

When: Thu February 6 2020 14:00 - 15:00
Where: Modulo 8, Sala de Grados

Gauge-invariant TDCIS method for high-harmonic generation from atoms and molecules

Takuma Teramura
Department of Nuclear Engineering Management, School of Engineering,
University of Tokyo, Japan

When: Wed February 12 2020 15:00 - 15:45
Where: Modulo 13, 5ª planta (Facultad de Ciencias)

Ab initio simulation of the angle-resolved photoelectron spectrum from atoms in intense laser pulses

Yuri Orimo
Department of Nuclear Engineering Management, School of Engineering,
University of Tokyo, Japan

Abstract: Laser technologies to generate intense femtosecond laser pulses and attosecond light pulses have opened strong-field physics and attosecond science. Photoelectron energy spectra (PES) and angle-resolved photoelectron energy spectra (ARPES), which are observed and analyzed to study electronic dynamics driven by laser pulses, are particularly important experimental probes in these fields. In this seminar, we present a numerical method to extract PES and ARPES from ab initio simulations, which combines the time-dependent surface flux (tSURFF) method, an efficient computational scheme to obtain photoelectron energy spectra, with the time-dependent multiconfiguration self-consistent-field (TD-MCSCF) method. Our development enables accurate ab initio computations of photoelectron energy spectra from multielectron systems subject to laser pulses with a computational cost significantly reduced compared to that required in projecting the total wave function onto scattering states. The present method is applied to the photoionization of Ne exposed to an attosecond extreme-ultraviolet (XUV) pulse and above-threshold ionization of Ar irradiated by an intense visible laser pulse for a demonstration of both accuracy and efficiency

When: Wed February 19 2020 15:00 - 15:45
Where: Módulo13 (sala de seminarios). Facultad de Ciencias, UAM.

Coherent control in chemical reactions

Juan Omiste
Departamento de Química, módulo 13,

When: Wed February 26 2020 14:30 - 15:30
Where: Departamento de Química, Módulo 13 (sala de seminarios). UAM

Progressive cluster approach to photoemission in transition metal dichalcogenides

By Marcelo Ambrosio

When: Fri April 29 2022 14:00 - 15:00
Where: Online

Attosecond photoionization delays in transition metal dichalcogenides

By Marcelo Ambrosio

When: Fri April 29 2022 14:00 - Tue May 3 15:00
Where: online

Theoretical modeling of electron transport in single-molecule junctions

By Joel Fallaque

When: Fri May 13 2022 15:00 - 16:00
Where: online

XCHEM description of vibrationally resolved RABBIT in the vicinity of Feshbach resonances of N2

By Vicent Borràs

When: Fri May 27 2022 15:00 - 15:00
Where: online

Attosecond pump-probe numerical experiments in glycine and acetylene

By Jorge Delgado

When: Fri June 10 2022 15:00 - 16:00
Where: online

Applications of structured light in high-order harmonic generation

Topic: Structured Light
By: Laura Rego
Abstract: Structured light beams exhibit spatially (or temporarily) dependent properties, such as phase, intensity, or polarization. In this talk we will see some applications of structured light in the non-linear interaction regime. In particular, vortex beams driving high-order harmonic generation allow us to create extreme-ultraviolet beams with time-varying orbital angular momentum, to control the polarization of the attosecond pulses, or to manipulate their frequency content. Finally, we will also show how light beams with structured polarization can serve as a tool for chiral discrimination.

When: Wed February 22 15:00 - 16:00
Where: Room 403 of Module 13, Chemistry Department (UAM)


Chemistry Department Seminar Series
By: Lorenzo Paoloni, postdoctoral researcher at the Chemistry Department (UAM)
Abstract: The theoretical description of the nuclear dynamics of flexible cyclic molecules was developed in the second half of the XX century by several scientists, partly to explain experimental results clearly affected by the presence of elusive large amplitude internal motions, partly to deal effectively with molecules which are not well suited to a description based on the most widespread internal coordinate systems.
After a brief introduction, an application of the ring puckering coordinates to the construction of one dimensional and two dimensional cuts of the potential energy surfaces (PESs) will be presented; moreover, a characterisation of pseudorotational and rotational motions of five-term ring systems will be proposed and discussed.
With regards to the analysis of 2D-PESs, special care is devoted to symmetry aspects, and analytical formulations of the computed 2D-PESs using suitable functional forms with a limited set of parameters are provided.
Solutions of the time-independent nuclear Schroedinger equation associated with the pseudorotational motion are illustrated and discussed for three five-term ring systems.

When: Wed March 1 15:00 - 16:00
Where: Sala de conferencias, módulo 0 (Faculty of Science, UAM)

Recent advances in the first principle simulation of attosecond XUV pump - XUV probe ionization spectra

By: Gilbert Grell
Authors: Gilbert Grell , Jesús González-Vázquez , Piero Decleva , Alicia Palacios , Fernando Martín
Recently, tunable sub-fs soft X-Ray (SXR) pulses became available at the LCLS X-Ray free electron laser (XFEL) at intensities that exceed those of current SXR high harmonic generation (HHG) sources by several orders of magnitude [1]. This achievement overcomes the current intensity related limitation of HHG-based attosecond XUV pump-probe experiments to using sub-fs XUV or SXR pulses as either the pump or the probe field. Thus, the realization of nonlinear X-Ray spectroscopic experiments employing sub-fs SXR pulses for driving and interrogating ultrafast dynamics in molecules at the attosecond timescale now lies within arms reach of the scientific community, offering unprecedented insights into the coupled electron-nuclear dynamics at its natural, i.e., the electronic timescale.
To decipher the measured traces of the intricate attosecond dynamics, high level theoretical modeling of the final observable is a formidable and highly demanded tool.
However, accurate simulations of the individual steps, i.e., (i) the ionization by the sub-fs SXR pump, (ii) the ensuing coupled electron-nuclear dynamics, and (iii) the interaction with the sub-fs SXR probe are extremely challenging undertakings in their own right already.
Their combination in a single study limits the computationally tractable system size severely, in particular, if the time resolved photoionization spectrum is sought after, which requires ionization calculations of the transient molecular state.
In this talk we present our progress in devising a protocol that balances computational cost and accuracy to allow complete, (i)-(iii), simulations of sub-fs pump-probe photoionization spectra in the XUV to SXR photon energy range for small organic molecules.
Therein, CASPT2 wave functions are employed to describe the molecular bound states of the neutral and ionic species, while the continuum states of the outgoing electrons are obtained with the static exchange B-spline DFT method, allowing for an accurate evaluation of the pump and probe photoionization amplitudes. We then employ the clamped nuclei approximation and take into account the zero point energy spread of the nuclear wave function by averaging over an ensemble of molecular geometries sampled from the ground state Wigner distribution.
The performance of the outlined protocol will be scrutinized for the cases in which the dynamics induced by a pump valence ionization are interrogated by the probe pulse with either another valence ionization, or a core ionization, respectively. Further, the impact of the sudden approximation, i.e., disregarding the explicit modeling of the electronic continua, will be investigated for the probe ionization step.
[1] J. Duris et al. Nat. Phot. 14, 30 (2020)

When: Wed March 8 15:00 - 16:00
Where: Chemistry Department, room 403 (UAM)

Studying chirality using ultrashort laser pulses with structured polarization

Chemistry Department Seminar Series
By: Laura Rego (Margarita Salas Fellow, Univ. Salamanca)
Abstract: Chiral molecules are very relevant in many chemical and biological processes. For that reason, distinguishing between the two versions of a chiral molecule (called enantiomers) is vital, but it is also challenging using conventional methods. In this talk we will see several schemes to study chirality using ultrashort laser pulses. These laser pulses are intense, so they induce nonlinear phenomena in the chiral molecules, and they have nontrivial polarization structures. We take advantage of the structured polarization of the laser to discriminate between the two enantiomers or even to imprint chirality in atomic systems.
Host: Fernando Martín

When: Wed March 15 15:00 - 16:00
Where: Sala de conferencias, módulo 0 (Faculty of Science, UAM)

Imaging electronic and atomic motion in molecules

Dr. Manish Garg
Max Planck Institute for Solid State Research, Germany
Tuesday, 21 March 2023 12:00
Place: Conference room (IMDEA Nanociencia).


Motion of electrons is at the heart of any chemical transformation, photo-induced charge or energy transfer process in molecules. Contemporary techniques in ultrafast science have the capability to generate and trace the consequences of this motion in real-time, but not in real-space. Scanning tunnelling microscopy (STM), on the other hand, can locally probe the valence electron density in molecules, but cannot provide by itself dynamical information at this ultrafast time scale. In my talk, I will show you how dynamics of coherent superposition
of valence electron states generated by < 5 femtosecond long carrier-envelope-phase (CEP) stable laser pulses, can be locally probed with angstrom-scale spatial resolution and 300 attosecond temporal resolution simultaneously, at the single orbital-level with the help of an STM, defying the previously established fundamental space-time limits [1-4].
Electronic motion in molecules is usually coupled with atomic motion, especially in molecules undergoing photo-induced charge/energy transfer, structural or chemical transformation. In order to understand this coupling, we have recently realized femtosecond broadband coherent anti-Stokes Raman spectroscopy (CARS) in an STM and it has enabled tracking of coherent atomic motions in a single graphene nanoribbon with subangstrom scale spatial, meV energy and ~30 fs temporal resolution, simultaneously [5-6]. Time-resolved CARS implemented in an STM is the key to probing both electronic and atomic motion at the same time.

1. Garg et al. Nature 359-363, 538 (2016).
2. Gutzler, Garg et al. Nature Reviews Physics 3, 441-453 (2021).
3. Garg et al., Nature Photonics, 16, 196-202 (2022).
4. Garg and Kern. Science 367 (6476), 411-415 (2020).
5. Luo et al. Nano Letters 22 (13), 5100-5106 (2022).
6. Luo et al. Under Review (2022). arXiv:2210.02561

When: Tue March 21 12:00 - 13:00

Full Control of non-symmetric molecules orientation using weak and moderate electric fields

By: Dr. Juan José Omiste (Universidad Complutense de Madrid)
Abstract: In this talk, we introduce a novel approach to attain full control over the rotational dynamics of asymmetric molecules using Quantum Optimal Control Theory (QOCT) [1].Specifically, we make use of the coupling between an external electric field and the permanent dipole moment to manipulate the orientation of non-asymmetric molecules [2, 3]. Our research demonstrates that any axis of a non-asymmetric molecule can be oriented using QOCT.

We provide evidence of the efficacy of our approach by utilizing 6-chloropyridazine-3-carbonitrile as a prototype example [3].
Furthermore, we conduct a spectral analysis of the control field to gain a comprehensive understanding of the control mechanism and the underlying physical phenomena contributing to the molecular orientation control.
[1] J. Werschnik and E. K. U. Gross, Quantum optimal control theory. J.
Phys. B At. Mol. Opt. Phys. 40, R175 (2007).
[2] L. H. Coudert, Optimal orientation of an asymmetric top molecule with terahertz pulses. J. Chem. Phys. 146, 024303 (2017).
[3] R. González-Férez and J. J. Omiste, Full Control of non-symmetric molecules orientation using weak and moderate electric fields (Preprint).

When: Wed March 22 15:00 - 16:00
Where: Universidad Autonoma de Madrid (room 403 of Modulo 13)

Computational Modelling of Biological Processes

By Juan José Nogueira, Talento fellow of Comunidad de Madrid at the Chemistry Department (UAM)

Abstract: The simulation of biological processes is a complex task which requires the combination of different quantum and classical mechanical techniques. Moreover, these hybrid calculations are often performed within a dynamic framework to account for vibrational and conformational sampling. In the case where the process under investigation takes place on a long-time scale, the application of efficient sampling approaches may also be needed. In this contribution, the application of many of these methods will be illustrated by discussing the mechanisms of some biological events recently investigated by our research group, including the permeation of small molecules through lipid bilayers and the binding of drugs to proteins and DNA strands.

When: Wed March 29 15:00 - 16:00
Where: Sala de conferencias, módulo 0 (Faculty of Science, UAM)

Real space and real time imaging of attosecond electron dynamics in molecules

By: Fernando Martín, Full Professor at the Chemistry Department (UAM)
Abstract: I will present recent experimental and theoretical work showing that direct visualization of the changes in the electron density can be achieves by combining ultrashor laser poulses and Scanning Tunneling Microscopy thus avoiding reconstruction from measured photoelectron or photoion spectra. M. Garg, A. Martín-Jiménez, Y. Luo, M. Pisarra, F. Martín, and K. Kern. “Real-space subfemtosecond imaging of quantum electronic coherences in molecules” Nature Photonics 16 196 (2022)

When: Wed April 19 15:00 - 16:00
Where: Sala de conferencias, módulo 0 (Faculty of Science, UAM)

"Simulating real time Electron Dynamics and Ultrafast Spectroscopy (EDUS) in 2D semiconductors with excitonic effects"

Topic: Condensed Matter
By: Mikhail Malakhov (UAM)

When: Wed April 26 15:00 - 16:00
Where: room 403 of Módulo 13

Catching and steering atoms and electrons in action by short-wavelength free electron lasers

By: Prof. Kiyoshi Ueda from Tohoku University (Japan)
The seminar talk will illustrate status of the titled study with short-wavelength free-electron lasers (FELs), focusing on characteristic properties of different facilities. The advent of hard x-ray FELs, such as SACLA in Japan, opened a route to extract a structure of a single nanoparticle [1] and its change upon the intense laser irradiation that transforms the nanoparticle into a nanoplasma [2]. The first high repetition rate soft X-ray FEL, European XFEL, combined with REMI/COLTRIMS, made a long-standing dream to watch atoms in action, initiated by photoexcitation of a molecule, a tangible reality [3]. Generations of two-colour attosecond pulses at LCLS in the USA opened the door to watch charge in action that occurs in the attosecond timescale [4]. Generating phase-coherent multi-colour pulses at FERMI, on the other hand, provided a novel approach to coherently control the electronic wave-packet [5] and to read out the photoionization phase, or attosecond photoionization time delay [6]. I acknowledge all the collaborators in the authors list of [1-6] for fruitful collaborations.
[1] A. Niozu et al. IUCrJ 7, 276 (2020); A. Niozu et al. PNAS 118, e2111747118 (2021).
[2] T. Nishiyama et al. PRL 123, 123201 (2019); A. Niozu et al. PRX 11, 031046 (2021).
[3] G. Kastirke et al. PRX 10, 021052 (2020); PCCP. 24, 27121 (2022).
[4] T. Barillot et al. PRX 11, 031048 (2021).
[5] K. Prince et al. Nat. Photon, 10, 176 (2016); D.

When: Tue May 9 15:00 - 16:00
Where: SALA DE GRADOS, Modulo 8, Facultad de Ciencias (UAM)

Molecular photoionization time delays. A full-dimensional study

By: Adrian Suñer
Abstract: The observation of electronic motion become possible after the realization of the first attosecond pulses (1 as = 10?18 s) [1,2]. It is thus nowadays possible to obtain real-time images of the formation and breaking of chemical bonds or to quantify the electron dynamics upon excitation or ionization processes [3,4]. In a photoionization event, the electron is ejected from an atom or a molecule after the interaction with an electromagnetic field. However, the emission is not instantaneous. How long does the electron wave packet require to escape? This is defined as photoionization time delay. The most successful experimental strategies to extract these photoionization time delays in atoms are the attosecond electron streaking [4, 5, 6] and the RABBITT technique [2, 7]. Both techniques use a pump-probe scheme, combining attosecond pulses with IR fields, to characterize the electronic wave packet, accessing the ultrafast dynamical information. The former uses a single pulse as a pump, while the latter uses a train of pulses.
Scarce works have been performed in molecules [8-10] to date and a solid theoretical ground to understand the physical meaning of a photoionization time delay when the electron is coupled to the nuclear degrees of freedom is still to be developed. We employ as benchmark system the simplest molecule, the hydrogen molecular ion. The dependencies with the nuclear degrees of freedom are investigated by performing, for the first time, full dimensional simulations to extract molecular photoionization time delays using the above-mentioned techniques and different molecule-laser relative orientations. Comparison with (semi-)classical trajectory Monte-Carlo simulations [11] allows to disentangle distinct classical and quantum contributions to the resulting streaking time delay.

[1] M. Hentschel et al., nature 414, 509 (2001)
[2] P M Paul et al., Science 292, 1689 (2001).
[3] F Krausz and M. Ivanov, Rev. Mod. Phys. 81, 163 (2009)
[4] N Nisoli, P Decleva, F Calegari, A Palacios and F Martín, Chem. Rev. 117, 10760 (2017)
[5] E Constant et al., Phys. Rev. A 56, 3870 (1997).
[6] J Itatani et al., Phys. Rev. Lett. 88, 173903 (2002).
[7] H G Muller, Appl. Phys. B 74, s17 (2002).
[8] R Pazourek et al., Rev. Mod. Phys. 87, 765 (2015).
[9] D Baykusheva and H J Wörner, J. Chem. Phys. 146, 124306 (2017).
[10] S Nandi et al., Sci. Adv. 6, eaba7762 (2020)
[11] Shvetsov-Shilovski N et al., Phys. Rev. A94, 013415 (2016)

When: Wed May 10 15:00 - 16:00
Where: Modulo 13, 4th floor

Strong ?eld control of dissociation dynamics

By: María Eugenia Corrales, Postdoctoral Scientist at the Department of Chemistry (UAM)
With current technology, laser radiation can easily achieve electric fields that are intense enough to induce changes or even dramatically modify the behaviour of molecules. Thus, a strong external laser field can be regarded as an additional reagent in molecular processes such as chemical reactions, and one that may be used to steer the reaction towards desired targets. We have studied ultrafast molecular photodissociation processes taking place under the influence of strong laser fields.
We have shown that it is possible to modify observables such as quantum yields, lifetimes. translational energies, or spatial distributions of the ejected fragments, by using strong picosecond or femtosecond near-infrared pulses. The control is achieved by opening new strong-field-induced reaction channels, or by creating light-induced conical intersections and modulating the potentials around them by light-induced potentials. These control scenarios and the outlook for future work will be the subject of this presentation.

When: Wed May 17 15:00 - 16:00
Where: Sala de conferencias, módulo 0 (Faculty of Science, UAM)

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