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Quantum Emergence of Linear Particle Accelerator and Anomalous Photon-induced Near-field Electron Microscopy in a Strong Coupling Regime

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posted on 2023-11-30, 18:50 authored by Jing Zhou, Ido Kaminer, Yiming Pan
Photon-induced near-field electron microscopy (PINEM) is a currently developing spectral approach that characterizes quantum electron-light interactions in electron energy gain/loss spectrum, with symmetrically discretized gains or losses of light quanta ($\hbar \omega$), coupled with a laser induced optical near-field. In this letter, we have demonstrated that Linear Particle Accelerator (LPA) and anomalous PINEM (APINEM) can analytically emerge from PINEM-kind interaction in a strong coupling regime, because of quantum interference of spectral photon sidebands overlap. Furthermore, we also found that the quantum interference in point-particle regime with pre-interaction drift can produce interesting optical spectral focusing and a periodically bunching of energy/momentum distribution that enable us to improve the spectral resolution of electron microscopy, imaging and spectroscopy. These observation of LPA and APINEM in strong laser physics can be of great interests for both theoretical and experimental communities, such as ultrafast electron microscopes, attosecond science and laser-driven accelerators.

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