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Título
Generation of extreme-ultraviolet beams with time-varying orbital angular momentum
Autor(es)
Fecha de publicación
2019-06
Citación
Rego, L., Dorney, K. M., Brooks, N. J., Nguyen, Q. L., Liao, C.-T., San Román, J., Couch, D. E., Liu, A., Pisanty, E., Lewenstein, M., Plaja, L., Kapteyn, H. C., Murnane, M. M., & Hernández-García, C. (2019). Generation of extreme-ultraviolet beams with time-varying orbital angular momentum. Science, 364(6447), eaaw9486. https://doi.org/10.1126/science.aaw9486
Resumen
Light fields carrying orbital angular momentum (OAM) provide powerful capabilities for applications in optical communications, microscopy, quantum optics, and microparticle manipulation. We introduce a property of light beams, manifested as a temporal OAM variation along a pulse: the self-torque of light. Although self-torque is found in diverse physical systems (i.e., electrodynamics and general relativity), it was not realized that light could possess such a property. We demonstrate that extreme-ultraviolet self-torqued beams arise in high-harmonic generation driven by time-delayed pulses with different OAM. We monitor the self-torque of extreme-ultraviolet beams through their azimuthal frequency chirp. This class of dynamic-OAM beams provides the ability for controlling magnetic, topological, and quantum excitations and for manipulating molecules and nanostructures on their natural time and length scales.
URI
ISSN
0036-8075
DOI
10.1126/science.aaw9486
Colecciones
- ALF. Artículos [297]
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