Spatiotemporal sampling of near-petahertz vortex fields
Abstract
Measuring the field of visible light with high spatial resolution has been challenging, as many established methods only detect a focus-averaged signal. Here, we introduce a near-field method for optical field sampling that overcomes that limitation by employing the localization of the enhanced near-field of a nanometric needle tip. A probe field perturbs the photoemission from the tip, which is induced by a pump pulse, generating a field-dependent current modulation that can easily be captured with our electronic detection scheme. The approach provides reliable characterization of near-petahertz fields. We show that not only the spiral wavefront of visible femtosecond light pulses carrying orbital angular momentum (OAM) can be resolved but also the field evolution with time in the focal plane. Additionally, our method is polarization sensitive, which makes it applicable to vectorial field reconstruction.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 05, 2022
- Source ID
- 10.1364/optica.459612
Entities
People
- Ancyline Maliakkal
- Andre Staudte
- B. Bergues
- Johannes Blöchl
- Johannes Schötz
- Matthias F Kling
- Natālija Šreibere
- Paul Corkum
- Peter Hommelhoff
- Philipp Rosenberger
- Zilong Wang
Organizations
- Alexander von Humboldt Foundation
- Defense Threat Reduction Agency
- European Research Council
- Friedrich-Alexander-Universität Erlangen-Nürnberg
- German Research Foundation
- Ludwig-Maximilians-Universität München
- Max Planck Institute of Quantum Optics
- Max Planck Society
- National Research Council Canada
- Natural Sciences and Engineering Research Council
- Office of Science
- SLAC National Accelerator Laboratory
- Stanford University
- University of Ottawa