Proceedings of the 8th International Conference on Attosecond Science and Technology (Springer Proceedings in Physics, 300)

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Preface Acknowledgements ATTO VIII Governance 1 Local Organizing Committee 2 International Program Committee 3 Advisory Boards 3.1 International Advisory Board 3.2 National Advisory Board Contents Part I Light Sources, High-Order Harmonics, and Attosecond Pulse Generation Single-Cycle Infrared Waveform Generation and Control 1 Motivation 2 Overview of the Experimental Setup 3 Single-Cycle CEP-Stable Laser Pulses 3.1 Spectral Broadening and Temporal Compression in TiO2 3.2 CEP-Stabilization 4 CEP-Controlled Mid-Infrared Waveform Synthesis 4.1 Cascaded Intrapulse Difference-Frequency Generation (IPDFG) and its CEP-Dependence 4.2 CEP-Controlled Multi-Octave Mid-Infrared Generation 4.3 Observing Waveform Control with Electro-Optic Sampling 5 Conclusion References Increase in Photon Flux of Attosecond Pulses 1 Introduction 2 Generation of High-Flux High Harmonics in the Water-Window Region 3 Generation of GW-Class Isolated Attosecond Pulses Driven by a Multi-Wavelength Synthesizer 4 Future Prospects References Bright Coherent XUV Generation in Microfluidic Glass Devices for Ultrafast X-ray Spectroscopy 1 Introduction 2 Efficient Generation of EUV in a Microfluidic Device 2.1 Design of the Microfluidic Source 2.2 Characterization of the EUV Photon Flux 3 A Flexible EUV Spectrometer for Transient Absorption Spectroscopy 4 Conclusion References Attosecond Physics and Quantum Information Science 1 Introduction 2 Detection of Topology, Strongly Correlated Systems, Chirality, etc. 2.1 Detection of Topological Order with HHG 2.2 Detection of Strongly Correlated Systems with HHG 2.3 Detection of Chirality with HHG 3 Generation of Topology, Strongly Correlated Systems, Chirality, etc. 4 Generation of Massively Quantum Correlated States 4.1 QED and Conditioning in Strongly Laser Driven Interactions 4.2 QED of Strong Field Processes Driven by Non-classical Light Fields 5 Studies of Quantum Correlated States/Decoherence in Zerfall Processes 5.1 Generation of Entanglement in Zerfall Processes 5.2 Characterizing Decoherence in Zerfall Processes 6 Conclusions References Part II Attosecond Spectroscopy of Atoms and Molecules Dynamics via Attosecond Four-Wave Mixing 1 Introduction 1.1 Attosecond Four-Wave Mixing (FWM) Spectroscopy 2 Discovering Phase-Matched Wave-Mixing Signals with Attosecond XUV Pulses and Few-Cycle NIR Pulses 2.1 Electronic and Vibronic Coherences in Atoms and Molecules 3 Increasing Resolution: Fully Non-Collinear Wave-Mixing 3.1 Exploring the Fully Non-Collinear Geometry 3.2 Direct Time-Domain Characterization of Highly Excited States 4 New Advancements: Techniques and Applications 4.1 Technique Developments 4.2 New Applications in Materials 5 On the Horizon References Optical Control of Autoionizing States in Argon 1 Introduction 2 Experimental Setup 3 Theoretical Simulations 4 Optical Control of Autoionizing Polaritons 5 Concluding Remarks References Retrieving a Complex Molecular Structure from Laser-Induced Electron Diffraction Using Machine Learning 1 Introduction 2 ML Algorithm 3 Extracting Molecular Structure 4 Summary References Imaging Ultrafast Dissociation Dynamics: OCS & Roaming in Formaldehyde 1 Introduction 2 Roaming in Formaldehyde 3 Post-Ionization Dynamics in OCS References Controlling the Time Evolution of Electron-Nuclei Entanglement for Steering Vibronic Coherences Dynamics Induced by Short 1 –2 fs Optical Pulses 1 Introduction 2 Quantification of the Time Evolution of Electron-Nuclei Entanglement in Molecules 2.1 Quantum Vibronic Dynamics in Coupled Electronic States 2.2 S Schmidt Rank and Compaction by Singular Value Decomposition of the Matricized Wave Function 3 Dynamical Evolution of the Entanglement and of the Singular Components 4 Extending to More than One Nuclear Degree of Freedom: Ultrafats Dynamics of the Jahn-Teller Effect in the Methane Cation 5 Conclusion References An MQDT Model for the Description of Time Resolved Pump Probe Experiments 1 Introduction 2 Introduction to MQDT 3 MQDT of the Argon Atom 3.1 Autoionizing Wave-Packets 3.2 Bound Wave-Packets 4 Conclusions and Discussion References ASTRA, A Transition Density Matrix Approach to the Interaction of Attosecond Radiation with Atoms and Molecules 1 Introduction 2 Theoretical Methodology 2.1 Single-Ionization Close-Coupling Space 2.2 Operator Matrix Elements with TDM Formalism 2.3 Observables 2.4 Orbitals and Integrals 3 Software Structure 4 Results 4.1 Nitrogen 4.2 Boron 4.3 Polyatomic Molecules 5 Conclusions and Perspectives References Symmetry-Protected Chiral Sensitivity in Photoionization with Bichromatic Fields 1 Introduction 2 Enantio-Sensitivity and Dichroism in Photoelectron Angular distributions 2.1 Previous Developments 2.2 Disentangling Dichroism from Enantio-Sensitivity 3 The ENED Signal 4 Conclusions References Experimental Investigation of Topological Property of Degenerate Singularities in Rescattering Processes 1 Introduction 2 Degenerate Singularities in the Hamiltonian System 3 Adiabatic Theory for Rescattering Processes 4 Experiment 5 Results References Simulating Strong Field Tunnel Ionization of Molecules 1 Introduction 2 General Approach 2.1 Details of QTMC Simulations 2.2 Results 3 Conclusion and Outlook References Control of Photoelectron-Ion Entanglement in Attosecond Laser-Induced Photoionization of H2 1 Introduction 2 Experiment 3 Calculations 4 Conclusions and Outlook References Part III Attosecond Spectroscopy of Condensed Matter Ultrafast Second-Harmonic XUV Spectroscopy: A Novel Probe for Symmetry 1 Introduction 2 Lithium-Specific Measurement in Symmetry-Broken Solids 3 Interpretation of Second-Order Susceptibility Tensor Components 4 Outlook References From Ultrafast Light-Induced Currents to Spatially-Resolved Field Sampling 1 Introduction 2 Light-Induced Currents in the Gas Phase 3 Spatially-Resolved Field Measurements with Nanometric Needle Tips 4 Conclusion References Attosecond Core-Exciton Dynamics in Wide-Gap Insulators 1 Introduction 2 Experimental Setup 3 Results 4 Conclusions References Polarization-Shaped Strong Field Control Over Valley Polarization with Mid-IR Light 1 Introduction 2 Valley Polarization in MoS2 3 Polarization Shaping and Trefoil Generation 4 Polarization Resolved Chiral Spectroscopy 5 Strong Field-Induced Valley Control 6 Summary References Part IV Panel Discussion The Future of Attosecond Science 1 Panel Discussion This open access volume brings together selected papers from the 8th International Conference on Attosecond Science and Technology. The contributions within represent the latest advances in attosecond science, covering recent progress in ultrafast electron dynamics in atoms, molecules, clusters, surfaces, solids, nanostructures and plasmas, as well as the generation of sub-femtosecond XUV and X-ray pulses, either through table-top laser setups or with X-ray free-electron lasers. In addition to highlighting key advances and outlining the state of the field, the conference and its proceedings serve to introduce junior researchers to the community, promote collaborations, and represent the global and topical diversity of the field.