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18/11/2026, 11:00Plenary talk
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Markus Guehr (Deutsches Elektronen-Synchrotron (DESY))18/11/2026, 11:30Plenary talk
Many molecular light-energy conversion processes in nature occur on an ultrafast (sub-picosecond) timescale, such as retinal light harvesting, optical switching of green and yellow fluorescent proteins, and nucleobase photoprotection. The conversion process often occurs at conical intersections, which are regions in molecular phase space characterized by degenerate potential energy surfaces...
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Marcos Dantus (Michigan State University)18/11/2026, 12:15Invited
Disruptive probing reveals reaction pathways that are hidden in conventional mass spectra by following how a delayed laser pulse redirects evolving molecular ions and clusters into specific fragment channels [1]. Here we combine femtosecond strong-field ionization, time-resolved mass spectrometry, and ab initio molecular dynamics simulations to investigate H3+ formation in methylamine,...
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Ignacio M. Casasús (Universidad Complutense de Madrid)18/11/2026, 12:40Oral
Evidence of resonant Coulomb explosion imaging induced by low-intensity femtosecond UV-pump UV-probe pulses is presented and applied to the investigation of the methyl iodide molecular dimer, (CH$_3$)$_2$. Since the UV-pump leads to excitation and dissociation of both monomers, and the UV-probe is configured to resonantly enhance ionization of a specic fragment, iodine or methyl, Coulomb...
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Estefania Sucre-Rosales (University of Geneva)18/11/2026, 12:55Oral
Three examples of charge transfer processes in rylene diimide molecules and macromolecules will be discussed using ultrafast transient absorption spectroscopy (TAS) results. First, the photoinduced charge transfer dynamics in luminescent donor-acceptor polymers and copolymers1 that use a single naphthalene diimide (NDI) as acceptor, polystyrene chains as primary donor, and secondary...
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PABLO SAN MIGUEL CLAVERIA (Universidad Politécnica de Madrid)18/11/2026, 13:10Oral
The generation of strong, transient magnetic fields is a defining characteristic of relativistic laser-solid interactions, playing a pivotal role in phenomena ranging from Target Normal Sheath Acceleration (TNSA) to micro-turbulent plasma instabilities. When high-intensity laser pulses irradiate overdense plasma targets, they drive complex, high-current electron dynamics that rapidly manifest...
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Prof. F. Javier García de Abajo (ICFO-Institut de Ciencies Fotoniques)18/11/2026, 15:00Keynote
Ultrafast electron microscopy has emerged as a research frontier, enabling the investigation of material excitations with an unparalleled combination of spatial and temporal resolution. Beyond their role as classical probes, free electrons have unique quantum properties that make them attractive resources for quantum nanophotonics and open fundamentally new avenues for quantum technologies. In...
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Eduardo Oliva Gonzalo (Universidad Politécnica de Madrid)18/11/2026, 16:00Oral
This work presents recent results on the interaction of structured light with plasmas. Experimental and modelling results unveil its potential applications in plasma diagnosis, especially in the fields of Inertial Confinement Fusion (ICF), plasma based soft X-ray lasers and Laboratory Astrophysics. The full propagation + interaction with plasma process can be modelled using our multiscale,...
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Eva Otero Picon (Universitat Politècnica de Catalunya)18/11/2026, 16:15Oral
In this work we design and study a dielectric multilayer with a geometry implementing the topological Su-Schrieffer-Heeger (SSH) model1,2 supporting a strong electromagnetic field localization at the surface, which enhances linear and nonlinear optical interactions. We study second harmonic generation (SHG) from the multilayer and use it as an indirect measurement of the localized surface...
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Sandra Gómez (Universidad Autonoma de Madrid)18/11/2026, 17:30Invited
Femtochemistry explores the ultrafast structural and electronic changes that occur in molecules following light absorption. The relaxation of photoexcited molecules often involves nonadiabatic effects, where coupled electronic and nuclear motion drives processes such as photodissociation, isomerization, ring-opening reactions, and internal conversion. Understanding these mechanisms is crucial...
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Carlos Doñate Buendia (University Jaume I, GROC-UJI)18/11/2026, 17:55Oral
Femtosecond laser ablation in liquids enables advanced control over nanoparticle (NP) structure, but efficient energy delivery remains a key challenge that can be addressed through beam-shaping strategies [1]. While conventional PLAL setups rely on spherical focusing optics, advanced spatial beam engineering offers new degrees of freedom to control energy distribution and ablation dynamics...
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Robertas Grigutis18/11/2026, 18:10Oral
Optical parametric chirped-pulse amplification (OPCPA) enables simultaneous generation of few-cycle pulses, high peak power, and high average power required for advanced strong-field and ultrafast mid-infrared applications [1]. We present a fully integrated OPCPA platform developed entirely using Light Conversion technologies, combining an ORPHEUS-OPCPA frontend with four synchronized 5 mJ...
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Francois COURVOISIER (Marie and Louis Pasteur University, CNRS, FEMTO-ST institute, F-25000 Besancon, France)19/11/2026, 09:00Plenary talk
The generation of very dense plasmas with ultrafast lasers is key to applications such as tabletop warm dense matter generation—the state of matter found in planetary cores or inertial confinement fusion paths—and laser-induced synthesis of new material phases. For these applications, generating dense plasma inside materials is highly desirable to benefit from large volumes and confined...
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Prof. Majed Chergui (Elettra Sincrotrone)19/11/2026, 09:45Invited
Ultrafast X-ray spectroscopies (absorption, emission and resonant inelastic X-ray scattering or RIXS) are powerful tools to monitor the photoinduced electronic, spin and structural changes in matter, with element-selectivity. They were developed over the past 25 years and are now firmly established to probe dynamics in (bio)molecular systems and in Materials, either using Synchrotron radiation...
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Dr Ana I. Gómez-Varela (Universidade de Santiago de Compostela)19/11/2026, 10:10Invited
Ultrafast laser fabrication offers a flexible way to produce three-dimensional microstructures with well-defined geometries and functionalities. Our work focuses on hybrid organic-inorganic photoresists as materials for biomedical microdevices, particularly for localized drug delivery1.
Dexamethasone is incorporated into the photoresist as a model drug, allowing its inclusion directly...
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Íñigo Sola (Universidad de Salamanca)19/11/2026, 10:35Invited
Versatile metrology of ultrashort pulses using amplitude swing technique
Íñigo Sola, a,b Cristian Barbero, a,b Miguel López-Ripa, a,b and Benjamín Alonso a,b
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a Grupo de Investigación en Aplicaciones del Láser y Fotónica (ALF), Universidad de Salamanca, 37008 Salamanca, Spain.
b Unidad de Excelencia en Luz y Materia Estructuradas (LUMES), Universidad de Salamanca, 37008 Salamanca,... -
Clara Saraceno (Ruhr University Bochum)19/11/2026, 11:35Keynote
Ultrafast laser-driven broadband Terahertz light sources are nowadays ubiquitous tools in many scientific fields, enabling researchers to control and probe an immense variety of low energy phenomena in condensed matter and other systems. They are also being increasingly deployed in industrial settings for inspection and non destructive testing: THz waves "see through" optically opaque objects,...
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Fernando Ardana Lamas (ICFO – The Institute of Photonic Sciences)19/11/2026, 12:10Invited
Abstract
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Attosecond transient absorption spectroscopy (ATAS) serves as a paramount technique for tracking real-time electronic motion and coherence in matter with unprecedented temporal resolution. Extending this technique towards higher photon energies adds an element sensitive probe as it allows to access core electrons. Apply to many body physics it allows to resolve both electron and... -
Belén Sotillo Buzarra (Department of Material Physics, Faculty of Physics, Complutense University of Madrid)19/11/2026, 12:35Invited
Niobium and niobium-based oxides are attracting increasing interest because of their chemical and thermal stability, superconducting properties, and potential applications in catalysis, photocatalysis [1,2], and energy storage [3]. Niobium oxides and mixed titanium-niobium oxides exhibit rich structural chemistry, defect-driven electronic behaviour, and tunable optical and electrochemical...
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DANIEL PUERTO GARCIA (Universidad de Alicante)19/11/2026, 13:00Invited
This work investigates the influence of laser repetition rate, pulse number, and fluence on surface-structure formation in PVA/AA and Biophotopol photopolymers under femtosecond laser irradiation [1]. By analyzing the dependence of structure height on the irradiation parameters, different growth efficiencies associated with monomer diffusion are identified, providing further insight into...
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Dr Asier Longarte (Euskal Herriko Unibertsitatea (EHU))19/11/2026, 13:25Oral
Pyrrole is a common aromatic motif present in many biological chromophores that can be electronically photoexcited by solar radiation. In isolated conditions, its relaxation dynamics takes place in tens of femtoseconds (fs), involving the coupling of πσ reactive states to the bright ππ states that mediate the photoexcitation.1 This behavior is thought to have important consequences in the...
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Luis Arnaut (University of Coimbra)19/11/2026, 15:00Keynote
Electron transfer reactions are arguably the simplest chemical reactions but they have not yet ceased to intrigue researchers. Charge-separation and charge-recombination reactions are at the core of life-sustaining processes, molecular electronics and solar cells. Intramolecular electron donor-acceptor systems capture the essential features of these reactions and enable their fundamental...
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Marta Fajardo (Instituto Superior Técnico, Instituto de Plasmas e Fusão Nuclear)19/11/2026, 15:35Invited
The increasing ability to control the spatial, temporal and polarization structure of ultrashort laser pulses opens new possibilities for tailoring light–matter interactions beyond the conventional Gaussian pulse. Orbital angular momentum, vector beams and spatio-temporal couplings can be used not simply to modify the focal intensity distribution, but to control the topology, velocity and...
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Marcos de Lucas Medina (IMDEA-Nanociencia)19/11/2026, 16:00Oral
Transition metal complexes play a central role in modern photophysics and photochemistry due to their ability to harvest light and mediate charge transfer processes [1,2] . However, many of the most efficient photoactive systems are based on scarce and expensive noble metals such as Ru, Ir, or Pt, which limits their large-scale application in photocatalysis, light-emitting devices, and solar...
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Niek van Hulst (ICFO - Institute of Photonic Sciences)19/11/2026, 16:15Oral
Ultrafast pump-probe spectroscopy generally involves fluences above J/cm2. Inside a microscope with diffraction limited spots fluences can be even higher. In contrast, natural light harvesting systems operate at sun-light conditions: ~100 mw/cm2, corresponding to around 1 nJ/cm2 for typical pulsed laser, rendering conventional transient pump-probe experiments unfeasible. Here we present a...
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Olivier ZABIOLLE (Amplitude)19/11/2026, 17:50Oral
Key words: High Average Power, High Peak Power, High Energy, Ultrashort Pulse, OPA/OPCPA, Ti:Sapphire, Ytterbium
Amplitude provides the broadest portfolio of ultrafast lasers based on diverse existing technologies: Ytterbium, Ti:Sapphire, Neodymium, OPCPA based systems... We report here the latest achievements in the development of high energy ultrafast femtosecond lasers along with our...
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Kushal Shaw (Universidad Complutense Madrid)19/11/2026, 18:05Oral
Photoexcitation of donor–acceptor chromophores initiates coupled electronic, structural, vibrational, and solvent dynamics. Here, we investigate the solvent-dependent photophysics of para-nitroaniline (PNA), a prototypical push–pull chromophore, using femtosecond broadband transient absorption spectroscopy following excitation at 400 nm.¹˒² Measurements were performed in water, methanol,...
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Alessia Pasquazi (Loughborough University)20/11/2026, 09:00Plenary talk
Optical frequency combs in microresonators, often termed 'microcombs', are optical sources made up of a series of equally spaced frequency lines. These lines are typically produced in nonlinear microcavities through the Kerr nonlinearity. The discovery of dissipative temporal cavity solitons marked a significant breakthrough in the field, enabling the generation of broad and smooth spectra...
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Cruz Mendez (Centro de Láseres Pulsados)20/11/2026, 09:45Invited
The Spanish Center for Pulsed Lasers (CLPU) [1] is one of the Spanish Singular Scientific and Technical Infrastructures (ICTS), hosting the VEGA laser facility as its user-oriented experimental target area.
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VEGA system is a Ti:Sapphire Chirped Pulse Amplification (CPA)-based laser chain comprising three beamlines called VEGA-1,2 and 3 delivering up to 20 TW, 200 TW and 1 PW peak power... -
Laura Rego Cabezas (Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC))20/11/2026, 10:10Invited
Laser light can be tailored in a broad variety of ways. From standard temporal and spectral shaping, which led to the generation of ultrashort laser pulses, to harnessing light’s polarization or creating beams with properties associated to their spatial structure. Interestingly, the capability of shaping light’s symmetries and structure can be used to investigate matter’s symmetries and...
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Óscar Pérez Benito (IMDEA Nanociencia)20/11/2026, 10:35Oral
We present progress towards the realization of a coherent extreme ultraviolet (XUV) beamline at IMDEA Nanociencia that images nanoscale phase textures in quantum materials with femtosecond temporal resolution. This is achieved by combining high-harmonic generation (HHG)¹ with coherent imaging methods². The beamline will deliver monochromatized, polarization-controlled XUV radiation for...
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Dr Pere Peréz-Millán20/11/2026, 10:50Oral
The Spanish company FYLA designs and manufactures ultrafast lasers and photonics systems. This talk presents the activities of the FYLA Ultrafast Photonics R&D Lab, whose research supports the company's different business units:
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LASER Business Unit:
Research on supercontinuum sources, focused on achieving ultra-broad, ultra-flat spectra and temporally coherent pulses. -
INSPECTION...
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Hugo Pires (Group of Lasers and Plasmas, Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico de Lisboa)20/11/2026, 11:35Invited
As the generation and amplification of ultrafast laser pulses have also become widespread, multidisciplinary applications ranging from fundamental physics to the biomolecular fields have proliferated.
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Recently, femtosecond technologies have been extended to high repetition rates (and high average powers) and scaled to high peak powers (high energy and short pulse duration) by using new... -
Carlos Molpeceres (Universidad Politecnica de Madrid)20/11/2026, 12:25Invited
The isolation of circulating tumor cells (CTCs) with high cell viability for further multi-omic analysis and organoid generation is a turning point in modern oncology. In recent years, CTCs and CTC cluster research have completely changed the roadmap of disruptive translational technologies in oncology, mainly because if adequate CTC isolation without cell modification could be achieved in...
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Henry Axt20/11/2026, 12:50Oral
Selective laser-induced etching (SLE) relies on ultrafast laser modification of glass followed by selective chemical removal, yet the transient mechanisms that connect laser exposure to the final etched surface morphology remain insufficiently understood. A key open question is to what extent the periodic and quasi-periodic surface patterns frequently observed after etching originate from the...
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Victor Vega Mayoral (Madrid Institute for Advanced Studies in Nanoscience, IMDEA Nanociencia)20/11/2026, 13:05Oral
Ag₂S-based nanocrystals (NCs) emerged in the recent years as highly promising emitters for deep-tissue imaging and luminescence nanothermometry. Their assets combine efficient NIR luminescence in the second biological window (1000 – 1350 nm), low cytotoxicity and large absorption cross-section. In this contribution we will focus on the light emission and photophysics properties of Ag2S NCs...
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Abhijit Dutta (IIT Kanpur)20/11/2026, 13:20Oral
Thiocarbonyl-containing compounds are known for their distinctive photophysical properties, particularly for their rapid intersystem crossing (ISC) and high triplet yield facilitated by enhanced spin–orbit coupling (SOC). However, the ISC efficiency and resulting triplet yields can vary significantly depending on molecular properties. This study explores the role of intramolecular charge...
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20/11/2026, 13:35Plenary talk
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