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Ponderomotive electron acceleration scheme based on polarization-gated SPR-enhanced optical field.
Kinetic energy spectra and angular distributions (inset) of accelerated electrons by SPR-enhanced optical fields. The navy and red lines stand for the results by using one-pulse excitation scheme with a maximum of , and polarization-gated scheme with a maximum of for each incident femtosecond laser pulse , respectively.
Angle-resolved energy distribution of the accelerated electrons by polarization-gated SPR-enhanced optical field, where the false color stands for the observation probability.
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