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| Attoworld | |
|---|---|
| Name | Attoworld |
| Domain | Physics |
| Time scale | Attosecond |
| Related | Extreme ultraviolet, High-harmonic generation, Free-electron laser |
Attoworld is the informal designation for the temporal regime and experimental field concerned with processes occurring on the attosecond timescale. It encompasses ultrafast photonics, ultrashort pulse generation, and electron dynamics probed using techniques developed in laboratories such as those at Max Planck Society, Lawrence Berkeley National Laboratory, and CERN. Research in this area connects to work on High-harmonic generation, Free-electron laser, Extreme ultraviolet spectroscopy, and collaborations among institutions like Massachusetts Institute of Technology, Stanford University, and University of Oxford.
The attosecond regime refers to intervals around 10^−18 seconds, situated between the femtosecond and zeptosecond domains studied by groups at ETH Zurich, École Polytechnique Fédérale de Lausanne, and California Institute of Technology. Benchmarks include characteristic times for electron motion in atoms such as hydrogen atom and helium atom and for charge migration in molecules investigated at Imperial College London and University of Tokyo. Contextual comparisons often invoke processes studied at SLAC National Accelerator Laboratory, RIKEN, Brookhaven National Laboratory, and facilities developing attosecond beamlines like DESY.
Foundational steps trace to theoretical proposals by researchers associated with Niels Bohr-inspired quantum models and experimental advances by groups led by scientists at Tata Institute of Fundamental Research and University of Freiburg. Early attosecond pulses emerged from developments in mode-locked laser technology and techniques parallel to those at Bell Labs, University of California, Berkeley, and Los Alamos National Laboratory. Key milestones include the first isolated attosecond pulse demonstrations connected to teams at Ludwig Maximilian University of Munich, University of Salamanca, and experiments leveraging methods from Institute of Photonic Sciences.
Primary generation methods employ High-harmonic generation driven by intense laser systems designed and built by groups at Thales Group, General Electric, and university laboratories such as University of Michigan and Yale University. Detection and characterization use interferometric schemes like attosecond streaking, photoelectron spectroscopy, and reconstruction algorithms developed in collaboration with researchers from Harvard University, Columbia University, and Princeton University. Beamline infrastructure often integrates components from European XFEL, SPring-8, National Institute of Standards and Technology, and instrumentation firms tied to Rutherford Appleton Laboratory.
Processes include ultrafast electron tunneling observed in atoms and molecules studied by teams at University of Göttingen and University of Vienna, charge migration in biomolecules explored at Karolinska Institute and University of Cambridge, and correlated electron dynamics relevant to condensed matter problems investigated at Oak Ridge National Laboratory and Argonne National Laboratory. Phenomena link to photoionization experiments similar to those at SLAC National Accelerator Laboratory and to time-resolved measurements analogous to work at MAX IV Laboratory and Paul Scherrer Institute.
Attosecond science informs ultrafast control strategies in optoelectronics developed at IBM, Intel, and Samsung Electronics research centers, and underpins metrology efforts at institutes like National Physical Laboratory and Physikalisch-Technische Bundesanstalt. It contributes to imaging techniques used in structural biology at European Molecular Biology Laboratory and to semiconductor research at TSMC and Micron Technology. Applied projects intersect with initiatives at DARPA, European Commission, and multinational consortia involving Hitachi, Siemens, and Panasonic.
Modeling relies on time-dependent quantum mechanics approaches employed by theorists at Princeton University, University of California, Los Angeles, and University of Toronto, using methods such as time-dependent Schrödinger equation propagation, many-body perturbation theory practiced at Perimeter Institute, and density functional theory implementations from groups at University of Illinois Urbana-Champaign and Rutgers University. Computational platforms often utilize supercomputing resources at Oak Ridge Leadership Computing Facility and MareNostrum and software frameworks inspired by projects at Lawrence Livermore National Laboratory.
Outstanding challenges include increasing pulse energy and repetition rate pursued by consortia at European XFEL, improving temporal resolution in concert with laboratories such as Rutherford Appleton Laboratory and DESY, and integrating attosecond methods into industrial workflows at corporations like Intel and TSMC. Future directions point toward combining attosecond probes with cryogenic electron microscopy programs at Max Planck Institute for Biophysical Chemistry and with quantum technologies developed at IBM Research, Google Quantum AI, and IonQ, and fostering interdisciplinary collaborations among institutions including Wellcome Trust, Human Frontier Science Program, and national funding agencies.
Category:Attosecond physics