WavemiX 2026 — COST ACTION NEXT Annual Meeting

Contribution List

49. A few steps towards 2D-spectroscopy in the X-ray domain

Invited talk (30 min incl. Q&A)

We present two recent experimental advances that constitute independent but essential steps towards realizing multidimensional spectroscopy in the X‑ray domain.
In the first experiment, we demonstrate coherent all‑X‑ray four‑wave mixing (XFWM) in neon near the K‑edge (870 eV) using single broadband SASE pulses from the Swiss Free Electron Laser. A square spatial mask splits the incoming beam...

27. A Simple Ab Initio Approach to Simulating X-ray-Induced Ultrafast Electron Dynamics in Complex Environments

Contributed talk (20 min incl. Q&A)

Over the past decades, experiments probing the X-ray-induced electron dynamics of various atomic/molecular systems in complex environments have provided mounting evidence that these dynamics occur on timescales of tens to hundreds of attoseconds.[$^{1,}$][1][$^{2,}$][2][$^3$][3] In stark contrast to the wealth of empirical evidence, a fully ab initio wavefunction-based description of the...

13. Advancements in Perovskite-Based Photocatalysts for Visible-Light CO2 Reduction: A Pathway to Sustainable Carbon Mitigation

Poster

The reduction of atmospheric CO2 to valuable fuels using photocatalysis is a promising strategy to mitigate climate change. My research focuses on the development of perovskite-based materials, specifically novel ZnMoFeO3 nanosheets, for visible-light-driven photocatalytic CO2 reduction. These novel materials exhibit exceptional photocatalytic efficiency and stability, selectively converting...

42. Advancing Transient XPS Spectroscopy: Modeling Approaches for Large Molecular Systems

Contributed talk (20 min incl. Q&A)

Recent advances at XFEL facilities have enabled the use of X-ray phtoelectron spectroscopy (XPS) as a probe in time-resolved measurements. Transient XPS spectroscopy combines high temporal resolution with exceptional sensitivity to local chemical environment, paving the way to study ultrafast, localized chemical changes with the element-specific XPS technique. Several joint experimental and...

64. Attosecond Control of Electron Wave Packet Localization in the Dissociation of an H2+* Molecule

Poster

We report on the use of isolated XUV attosecond and 7fs IR pulses to control electron localization during an ultrafast H2+ dissociation process. First, a broadband part of the XUV spectrum, centered at 43 eV, coherently excites at least four H2+ electronic states that dissociate into the n=2 limit. Second, the IR pulse is used to control the localization of the electronic wave function in...

40. Attosecond coupling delay in ionization to entangled states of CO₂⁺

Contributed talk (20 min incl. Q&A)

It has been suggested in the past [1,2] that the attosecond delays measured in the experimental method of "reconstruction of attosecond beating by interference of two-photon transitions" (RABBITT) would be affected by IR-driven dipole transitions within the residual ion, provided that the energy separation of the residual ion states in question were close to a resonance with the IR. Signatures...

5. Boosting XUV via high-order frequency mixing

Invited talk (30 min incl. Q&A)

The generation of bright, coherent XUV light via frequency conversion of intense laser drivers is a problem of both fundamental and technological importance. Increasing the intensity of the generated high harmonics by raising the intensity of the driving field only works up to a point: at high intensities, rapid ionisation of the medium limits the conversion efficiency.

We identify the...

63. Building a tabletop EUV platform for ultrafast magnetism and correlated-materials spectroscopy

Poster

Tabletop high-harmonic generation (HHG) sources can provide coherent, ultrashort extreme-ultraviolet (EUV) pulses with direct relevance to nonlinear spectroscopy, attosecond science, and element-specific studies of condensed matter [1–3]. We present ongoing developments at the University of Porto towards an integrated platform for waveform-controlled high-harmonic generation and EUV nonlinear...

37. Chasing high-intensity XUV pump-probe experiments at ELI Beamlines

Poster

XUV sources based on High-order Harmonic Generation (HHG) are versatile tools with attosecond capabilities. However, a significant drawback of the generation process remains the low conversion efficiency and the technical challenges associated with upscaling using high-power lasers. In high-intensity pump-probe experiments, it is therefore crucial to compensate for the low conversion...

8. Compact Laser-Driven Kα X-ray Source for Femtosecond Pump-Probe Diffraction at ELI Beamlines

Poster

We report on a compact laser-driven plasma X-ray source developed
and operated at ELI Beamlines for time-resolved diffraction, spectroscopy,
and imaging applications. The source is based on the interaction of an
ultrashort near-infrared laser (central wavelength λ ≈ 800 nm, pulse du-
ration τ ≈ 30–50 fs) with solid targets at intensities in the range of 10^17–
10^19 W/cm2. Under these...

11. Deep UV Raman Insights into Acid-Induced Enamel Demineralization and Hydroxyapatite Loss

Contributed talk (20 min incl. Q&A)

Deep ultraviolet (DUV) Raman spectroscopy was employed to probe molecular and structural alterations in human enamel following orthophosphoric acid etching, used here as an in vitro model of hydroxyapatite loss and surface conditioning. Benefiting from resonance enhancement and intrinsic fluorescence suppression, the technique enabled the direct acquisition of high-quality spectra from intact...

39. Design Principles for Next Generation of Small Organic Molecules for Photodynamics Therapy Revealed by Nonadiabatic Molecular Dynamics

Poster

Nitrobenzochalcogenadiazole derivatives are emerging candidates for Photodynamic Therapy (PDT), yet the precise mechanisms governing their excited-state deactivation and triplet generation remain to be fully elucidated. This study employs non-adiabatic dynamics simulations, using the Trajectory Surface Hopping method within a Linear Vibronic Coupling (LVC) framework, to unravel the Intersystem...

58. Diffractive X-ray Optics for XFELs

Invited talk (30 min incl. Q&A)

X-ray free electron laser methods provide unique insight into the structure and dynamics of materials by enabling the observation of ultrafast processes on atomic and molecular length scales. Many XFEL experiments rely on advanced X-ray optics to manipulate, split, shape, and focus the beam in order to realize specific experimental methods. Diffractive optics fabricated using lithographic and...

33. Disentangling Elementary Steps in Acid-Base Reactions in Aqueous Solution with X-Ray Spectral Signatures

Invited talk (30 min incl. Q&A)

Acid-base reactions in aqueous solution, where protons are exchanged between acid and base molecules directly or via the hydrogen-bonded water solvent molecules, are particularly well-suited test beds for studying proton transfer reactions. We have chosen naphthol-type photoacids to initiate proton transfer towards an organic or inorganic base base imidazole in aqueous solution. We report on...

35. Dynamics and fluctuations in triggered ground-state reactions – Tracking C–H activation with ultrafast X-ray spectroscopy

Invited talk (30 min incl. Q&A)

Ph. Wernet on behalf of the collaborations in references 4-7.

Conceptually attractive but practically very hard, bond activation in small inert molecules for functionalization and transformation into valuable chemicals is notoriously difficult because the bonds in inert molecules are so stable. Understanding bond activation also poses seemingly insurmountable challenges to experiment and...

20. Dynamics of Electron-Transfer-Mediated Decay in a Weakly Bound Trimer

Contributed talk (20 min incl. Q&A)

Understanding ultrafast relaxation following inner-shell ionization is central to XUV/X-ray spectroscopy and attosecond science. Electron-transfer-mediated decay (ETMD) is an efficient nonlocal mechanism for charge and energy redistribution in weakly bound systems, triggered by core ionization. We investigate a loosely bound NeKr₂ trimer as a prototype system, combining theoretical modeling...

41. Enhanced Nonlinearity in Epsilon-Near-Zero (ENZ) Nanostructures: A Rigorous Wavelength-scale Electromagnetic Analysis

Contributed talk (20 min incl. Q&A)

Recently, epsilon-near-zero (ENZ) materials have attracted sustainable scientific and technological interest in the fields of advanced photonics and nonlinear optics, offering enhanced light-matter interactions at the nanoscale with promising performance extending from the IR/visible to XUV and hard X-ray ranges. Although some materials with permittivity close to zero exist, most of them are...

12. Entanglement Control and Transfer: From Strong Coupling to Spontaneous Decay

Contributed talk (20 min incl. Q&A)

Entanglement Control and Transfer: From Strong Coupling to Spontaneous Decay

We theoretically investigate how phase-locked laser pulses can generate, control, and transfer quantum entanglement in photoionization. Recent XUV free-electron laser experiments have enabled access to strong-field dynamics in this regime [1]. Ionization followed by laser-driven coupling between ionic states...

14. EU grants to boost your career: ERC and MSCA Interactive training session

Lecture

Securing competitive research funding is one of the most transformative milestones in an academic career. European funding schemes such as the European Research Council (ERC) grants and Marie Skłodowska-Curie Actions (MSCA) represent outstanding opportunities for researchers at all stages — yet the path from a compelling idea to a successful application often feels unclear.

This training is...

1. EUV AND X LINE PROFILES BROADENED BY COLLISIONS WITH CHARGED PARTICLES FOR PLASMA INVESTIGATION AND MODELLING

Poster

The spectral line profiles broadened by collisions with charged particles of spectral lines in EUV and X wavelength range are useful for diagnostics and spectral analysis of different plasmas as for example for laser produced plasma in front of different targets in HHG experiments. We note as well that line profiles enter in the calculation of absorption coefficients, radiative transfer...

18. EUV and X-ray transient gratings: nanoscale dynamics and beyond

Invited talk (30 min incl. Q&A)

The extreme ultraviolet transient grating approach (EUV TG) was conceived for probing nanoscale collective dynamics in condensed matter, such as thermal relaxations, phonons and magnons [1-3]. In recent years, the “structured” (i.e. spatially sinusoidal) excitation pattern provided by the EUV TG “pump” was used in different contexts, ranging from nanoscale all-optical magnetic switching [4] to...

21. EUV Diffuse Scattering for Nanoscale Acoustic Phonons and Thermoelasticity

Invited talk (30 min incl. Q&A)

Thermoelastic properties at the nanoscale play a central role in condensed matter physics and nanostructured materials, yet remain challenging to probe experimentally. Extreme ultraviolet (EUV) transient grating (TG) technique has recently enabled access to these dynamics at selected wavevectors in the tens-of-nanometers range, providing insight into nanoscale thermal transport and acoustic...

54. Evolution of FLASH1 into a Fully Seeded, MHz-Capable FEL Facility

Invited talk (30 min incl. Q&A)

25 years after the first lasing of FLASH and 20 years of operation as a user facility, delivering free electron laser radiation in EUV and soft X-ray spectral range, the source underwent a massive refurbishment and upgrade project under the umbrella of the FLASH2020+ project. This included the modification of the FLASH1 beamline to deliver seeded free electron laser (FEL) pulses for users....

48. Exploring Chemistry in Liquids with Soft X-ray Spectroscopy

Invited talk (30 min incl. Q&A)

Light–matter interactions govern a vast range of fundamental processes in nature. Following the absorption of light, molecular systems undergo a cascade of ultrafast electronic and nuclear dynamics that evolve within a complex environment. Capturing and understanding these transient processes at the molecular level remains one of the major challenges in modern science, owing to the extremely...

24. Extreme ultraviolet zone plate for ultrafast applications

Contributed talk (20 min incl. Q&A)

The focusing of extreme ultraviolet (XUV) radiation is essential for attosecond spectroscopy and microscopy, angle-resolved photoemission spectroscopy (ARPES) and has important applications in metrology and lithography. Designing transmissive optical elements in this wavelength regime is challenging due to strong material absorption, and reflective optics require expensive fabrication methods...

19. Fluorescence imaging of nonlinear x-ray propagation and lasing

Contributed talk (20 min incl. Q&A)

We introduce a general approach for probing nonlinear x-ray propagation by imaging secondary fluorescence emitted transverse to the driving field [1]. When a short, intense x-ray pulse excites a deep 1s core orbital, subsequent Kα emission from spin-orbit-split 2p states can undergo stimulated amplification. This nonlinear process reshapes the relative populations of the $2p_{1/2}$ and...

62. From Highly-Excited States to Attosecond Dynamics: A Multi-Reference Theoretical Perspective

Invited talk (30 min incl. Q&A)

Over the past decade, the ultrafast paradigm in physics and chemistry has shifted from the femtosecond to the sub-femtosecond domain. To keep pace with experiment, accurate and efficient theoretical methods are required. In this talk, I will present multi-reference computational protocols for describing highly excited electronic states in molecules, which serve as the foundation for simulating...

16. HHG-Driven XUV Transient Gratings

Contributed talk (20 min incl. Q&A)

Transient grating spectroscopy is a versatile tool for investigating ultrafast and nanoscale phenomena, although its spatial resolution is generally constrained by optical wavelengths. Here, we report the design and realization of a proof-of-concept transient grating experiment driven by extreme-ultraviolet radiation produced via high-harmonic generation, providing a compact alternative to...

46. High-Repetition-Rate Ultraviolet Beamline for Time-Resolved Experiments on the Few-Femtosecond Timescale

Contributed talk (20 min incl. Q&A)

Investigating ultrafast dynamics in increasingly complex neutral molecular systems requires advanced spectroscopic techniques that offer high temporal resolution and robust statistics. Recent breakthroughs in table-top sources producing few-femtosecond (fs) ultraviolet (UV) pulses have unlocked new experimental pathways in this field [1, 2]. Here, we present a high-repetition-rate UV beamline...

65. In-Situ Plasma Characterization During an XUV High-Harmonic-Generation Process

Poster

We perform high-resolution optical spectroscopy of a laser-produced plasma during a highharmonic-generation (HHG) process. This technique allows for non-invasive, in-situ plasma characterization, providing crucial parameters of an HHG process. For example, exact plasma parameters such as degree of ionization, neutral-to-ion ratio and electron density play an important role during the...

6. Integrating UV and X-ray Spectroscopy for Multiscale Structural and Functional Analysis of Liquids and Soft Matter

Poster

Liquids and soft matter systems—including biological macromolecules, colloids, polymers, and complex fluids—exhibit pronounced structural heterogeneity across multiple spatial and temporal scales. Elucidating their physicochemical behavior requires integrated analytical approaches capable of probing both local electronic environments and long-range structural organization. This contribution...

44. MAC: A Multipurpose station for Atomic, Molecular and Optical sciences and Coherent Diffractive Imaging at ELI Beamlines facility

Poster

ELI Beamlines facility is an international research center, operated within the Extreme Light Infrastructure ERIC, which offers laser-driven sources of photons and accelerated particles for user experiments. The MAC end-station at ELI Beamlines is a Multipurpose station for AMO (atomic, molecular and optical sciences) and CDI (coherent diffractive imaging). It is dedicated to investigations of...

51. Modelling the effect of solvation on core-level excited states of propylamine and propylammonium

Poster

Biomolecular radiation damage is a natural process caused by high-energy photons, in which a core excited/ionized state is formed. These intermediate states can be experimentally reproduced by interaction of X-ray radiation with biochemically relevant molecules and further studied by the means of X-ray absorption spectroscopy (XAS) or Auger Electron Spectroscopy. Additionally, theoretical...

30. Modular multiscale approach to modelling high-harmonic generation in gases

Contributed talk (20 min incl. Q&A)

We will present the recently released open-source MMA-HHG toolbox for modelling high-harmonic generation (HHG) in gases. The package provides a common framework for coupling the microscopic response of elementary emitters to the local driving field resulting from nonlinear propagation in the macroscopic generating medium, and for coherently combining these contributions to reconstruct the...

17. Molecular High-Harmonic Generation from Quantum Chemistry: Toward Predictive Spectroscopy

Invited talk (30 min incl. Q&A)

High-harmonic generation (HHG) is a central process in attosecond science and an emerging tool for probing ultrafast electron dynamics in molecules. Its theoretical description is particularly demanding, as it requires the simultaneous treatment of continuum dynamics, ionization, and many-electron effects.
In this seminar, I will present a theoretical approach in the field of quantum...

29. Monitoring acetonitrile's isomerization dynamics by time-resolved x-ray spectroscopy

Contributed talk (20 min incl. Q&A)

We report on theoretical calculations aiming at interpreting a recent experiment at the Linac Coherent Light Source (LCLS) free-electron laser (FEL), in which time-resolved x-ray photoelectron and absorption spectroscopy (TRXPS and TRXAS) were employed to monitor the photoinduced isomerization of gas-phase acetonitrile molecules following ionization by an intense infrared (IR) pulse....

47. New advances in Attosecond Chemistry

Invited talk (30 min incl. Q&A)

Since the first attosecond pump-probe experiments performed in molecules [1,2], the field has grown exponentially, leading to the new discipline of attochemistry [3]. As a result, it is nowadays possible to follow in real time the motion of the “fast” electronic motion in molecules, mostly in the gas phase, and understand how this motion affects the “slower” motion of atomic nuclei and vice...

56. New Frontiers of Wave Mixing with Free Electron Lasers

Invited talk (30 min incl. Q&A)

The recent advent of Free Electron Lasers (FELs) has enabled the extension of experimental techniques traditionally developed for tabletop pulsed lasers into much shorter wavelength regimes. This breakthrough opens new opportunities for probing ultrafast dynamical processes with unprecedented spatial and temporal resolution. Among the expanding range of FEL-based methodologies, nonlinear...

15. On the interpretation of molecular photoexcitation with long and ultrashort laser pulses

Contributed talk (20 min incl. Q&A)

Photoexcitation is an inherent part of any photochemical or spectroscopic experiment, yet its role in excited-state dynamics is often overlooked. In practice, however, it is the photoexcited molecular state, built upon photoexcitation and shaped by the characteristics of the light source, that ultimately determines the fate of the excited molecule and its subsequent photochemical behavior. In...

7. Photoelectron helicoidal dichroism in multiphoton and above-threshold ionization

Contributed talk (20 min incl. Q&A)

While the influence of the spin angular momentum (SAM) of light on photoelectron angular distributions has been extensively studied [1], the role of orbital angular momentum (OAM) in strong-field ionization remains largely unexplored. In a seminal publication, De Ninno et al. [2] reported that when helium atoms are ionized by a circularly polarized XUV pulse, in the presence of an IR field...

4. Photoinduced structural and functional switching in GaS and VO2 thin films

Poster

Ultrafast excitation can drive distinct structural pathways in thin films, enabling control of lattice order and the associated electronic response. In this poster, we compare GaS and VO2 thin films as two complementary systems for femtosecond-laser-induced structural switching. For GaS, X-ray diffraction measurements combined with ab initio calculations identify an irreversible modification...

31. Polarisation Resolved X-ray Coherent Raman Spectra Distinguishes Between Competing Pathways in 2,5-dichlorofuran

Poster

Understanding light absorption and energy redistribution in molecules is a central goal of molecular photophysics. Strong coupling between electronic and nuclear degrees of freedom at conical intersections plays a significant role in these processes, yet direct monitoring of their dynamics remains a significant challenge [1]. Transient redistribution of ultrafast electronic coherences in...

22. Polarization-Controlled Nuclear Dynamics at Conical Intersections

Poster

Conical intersections (CIs) play a central role in molecular dynamics, as they enable ultrafast non-radiative population transfer between electronic states and thus govern the outcome of many photochemical processes. Recent work has demonstrated potential opportunities to control nuclear dynamics via CIs by exploiting their symmetry-breaking properties [Phys. Rev. Lett. 120, 123001]. However,...

38. Probing Competitive Photochemical Pathways of a Furan Derivative via Surface Hopping Dynamics and Ultrafast Electron Diffraction

Poster

Conical intersections (CIs) play a crucial role in determining the photochemical outcomes of excited-state molecular dynamics. The direct monitoring of CIs remains a big challenge for time-resolved spectroscopy [1] due to ultrafast timescales and strong coupling of nuclear and electronic motions. This challenge is even more emphasized when multiple CIs are in competition to each other.
Here,...

45. Probing ultrafast melting of group-III oxides with X-ray free-electron lasers

Contributed talk (20 min incl. Q&A)

Theory predicts that intense femtosecond laser pulses can induce ultrafast nonthermal transitions and melting in solid-state materials occurring on timescales of a few hundreds of femtoseconds [1]. During the first picosecond, the matter is in what is known as the warm dense matter (WDM) state — a state at the boundary between the solid phase and strongly coupled plasma. While the crystal...

25. Pulsed Laser Ablation in Liquid for the Synthesis of FeGaInS₄ Nanostructures: Structural and Optical Characterization

Contributed talk (20 min incl. Q&A)

The controlled synthesis of nanomaterials with defined size, morphology, and high purity remains a central objective in modern nanotechnology due to their distinctive optical, electronic, and catalytic properties. Among available fabrication approaches, Pulsed Laser Ablation in Liquids (PLAL), also referred to as Laser Ablation Synthesis in Solution (LASiS), has emerged as a versatile and...

50. Real-time observation of conical intersection in biomolecules[

Invited talk (30 min incl. Q&A)

When light interacts with a biomolecule, it can initiate dynamical processes that unfold on ultrafast timescales. These processes, including energy relaxation, energy and charge transfer, and conformational changes, underlie many fundamental biochemical phenomena such as vision, photosynthesis, and the photoprotection of DNA against ultraviolet radiation. The remarkable speed of these...

28. Simulating Photoinduced Electron Dynamics for X-ray Absorption Spectroscopy and X-ray Natural Circular Dichroism in Molecules

Poster

Chirality is essential in biochemical processes and drug design [1]. While traditionally studied in the optical regime, X-ray sources allow extending chiroptical techniques to core-level excitations, offering element-specific information and enhanced sensitivity due to shorter wavelengths [2]. However, theoretical support is vital to interpret these spectra [3]. In this work, we present a...

2. Spectroscopic Data and New Modeling Resources

Poster

Modeling nonlinear (NL) spectroscopy and molecular dynamics in molecules and materials is essential for understanding ultrafast processes and accurately interpreting experimental observations. Photoionization occurs on the attosecond timescale of electron motion, allowing direct insight into the dynamics of emitted electrons. These phenomena depend on multiple variables, which we have...

59. The COSTs and Benefits of Multigenerational Teams

Dr Adéla Gjuričová (Institute of contemporary History CAS)

Lecture

This seminar focuses on soft skills in the research environment, particularly in relation to managing and working in multigenerational teams. Participants will learn about generational theory, the main generations active in research and the primary challenges caused by generational differences. Finally, we will propose and discuss several approaches to facilitating work in multigenerational teams.

32. The Gammatron Beamline: A Compact Source of Betatron X-ray Radiation

Poster

Laser wakefield acceleration (LWFA) offers a way to accelerate electrons to high energies over very short distances, providing a compact alternative to conventional large-scale accelerators. The Gammatron beamline is designed to exploit this mechanism for the generation of short-wavelength, broadband X-ray radiation based on betatron emission.
In this setup, an intense laser pulse is focused...

52. Theoretical description of attosecond imaging and spectroscopy

Invited talk (30 min incl. Q&A)

We theoretically explore how attosecond x-ray and extreme ultraviolet pulses can be employed for imaging electron dynamics in real time. In the first part of my talk, I will present our ab initio description of x-ray experiments on laser-driven materials, namely, attosecond x-ray diffraction and absorption spectroscopy from materials during the time they are optically-driven by light. In the...

36. Time-resolved photoelectron spectroscopy: a pragmatic ab initio perspective

Poster

Time-resolved photoelectron spectroscopy (TRPES) serves as a robust tool to probe evolving electronic structure during ultrafast molecular processes in the gas and liquid phases. Valence band TRPES has shown its capacity to follow conical intersection dynamics and excited-state relaxation processes [1]. Understanding these high coupling regions, e.g., conical intersections is key to predict...

23. Tracking the early photoisomerization dynamics in Hemithioindigo molecular motors by Time-Resolved X-ray Photoelectron Spectroscopy

Contributed talk (20 min incl. Q&A)

Molecular motors are prototypical nanoscale systems capable of converting external energy into directed motion, offering unique opportunities for light-controlled functionality at the molecular level. Among them, hemithioindigo (HTI) motors have emerged as benchmark systems [1-3] due to their robust, reversible Z–E photoisomerization and their sensitivity to chemical substitution, which...

34. Ultrafast Charge-Transfer-To-Solvent from Resonant X-ray Spectroscopies

Invited talk (30 min incl. Q&A)

Charge-transfer-to-solvent (CTTS) excitations in aqueous solution provide a prototypical route to excess-electron formation in liquids. The generation of low-energy electrons is a key step in radiation chemistry and radiation-induced damage, yet the earliest stages of CTTS-state formation remain poorly understood. In particular, it is still unclear whether the initially prepared states are...

53. Ultrafast nanoscopy by deactivated high-harmonic generation from solids

Invited talk (30 min incl. Q&A)

Attosecond, atomic-scale movies remain a long-standing dream, with transformative applications from tracking resonances in metamaterials to observing phase transitions in strongly correlated materials. We propose a radical new route to this vision: HADES - Harmonic Deactivation Microscopy. By confining solid-state HHG far below the diffraction limit using an orbital-angular-momentum prepulse,...

55. Ultrafast Probes of Molecular Chirality

Invited talk (30 min incl. Q&A)

Chirality is a fundamental concept in many research fields, including physics, chemistry, and biology. A chiral object is not superimposable on its mirror image or, equivalently, lacks an improper rotational axis. Each chiral molecule exists in two structures with opposite handedness, called enantiomers. The difference in geometrical structure between enantiomers leads to specific reactivity...

9. Ultrathin Femtometer for few-cycle Pulses

Poster

We present an in-line, attosecond-stable, ultrathin glass plate autocorrelator, which is capable of measuring few-cycle femtosecond (fs) pulses with ease using a phone camera. The device consists of a pair of micrometer thin identical glass plates that split the incident wavefront of femtosecond pulses with attosecond-resolved time delay between them . Its performance is validated by accurate...

3. X-Ray Diffraction Imaging of Warpage

Contributed talk (20 min incl. Q&A)

Abstract
X-ay Diffraction (XRD) mapping is a non-destructive metrology technique that enables the reconstruction of warpage induced on a Silicon wafer through thermo-mechanical stress. Here, we mapped the wafer's warpage using a methodology based on a series of line scans in the x and y directions and at different 90-degree rotations of the same sample. These line scans collect rocking curves...

57. X-ray induced electron–nuclear dynamics at ab initio level: from isolated molecules to liquids

Invited talk (30 min incl. Q&A)

Ultrafast EUV and X-ray sources open a regime where electronic relaxation, charge migration, proton transfer, and nuclear fragmentation occur on comparable femtosecond or attosecond time scales. In this contribution, I will discuss how ab initio theory can help translate such experiments into molecular mechanisms, and how, conversely, EUV/X-ray measurements provide stringent benchmarks for...

26. X-ray natural circular dichroism of chiral molecules in liquids

Contributed talk (20 min incl. Q&A)

Molecular chirality is central to biology and chemistry. Identification of enantiomers of chiral molecules is based on optical circular dichroism (CD), which was developed starting from the XIXth century and it measures the absorption difference of left and right circularly polarised light by the sample [1].
CD signals are intrinsically weak, usually 0.1% of the linear absorption, which...

10. X-ray Second Harmonic Generation and Other Things

Invited talk (30 min incl. Q&A)

Recent results on second order nonlinear processes will be presented. This includes work on silicon photovolatics, liquid water, and the fundamentals on the surface sensitivity of second harmonic generation as well as some unexpected nonlinear signals. Time permitting, discussion of x-ray circular helical dichroism may also occur.