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15 March 2023 Classical vs. quantum effects in photon coupling to free electrons
Ofer Kfir
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Proceedings Volume PC12419, Ultrafast Phenomena and Nanophotonics XXVII; (2023) https://doi.org/10.1117/12.2647430
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
Free electrons at relativistic velocities enable subwavelength spectroscopy of photons, plasmons, and excitons. The information transfer between these electronic and photonic systems points to their entanglement, standing in sharp contrast to the classical point-particle description of electron spectroscopy. Understanding the quantum electron-photon interaction and the quantum-to-classical transition would enable electron-based nanophononics to probe and drive novel phenomena. This talk discusses the electron-photon coupling phenomena of cathodoluminescence (CL), electron energy-loss spectroscopy (EELS), and photon-induced nearfield e-microscopy (PINEM). Starting from the electron-photon entanglement, I will show the emergence of the experimentally known EELS and PINEM spectra. I will present predictions of further properties of CL, such as its temporal coherence, and link them to the formation of attosecond-long electron pulses within the electron microscope.
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Ofer Kfir "Classical vs. quantum effects in photon coupling to free electrons", Proc. SPIE PC12419, Ultrafast Phenomena and Nanophotonics XXVII, (15 March 2023); https://doi.org/10.1117/12.2647430
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KEYWORDS
Electrons
Charged particle optics
Electron microscopes
Laser spectroscopy
Photonics systems
Plasmons
Polarization
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