Journal
APPLIED PHYSICS LETTERS
Volume 98, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3567941
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Funding
- Hungarian Scientific Research Fund [F60256, 81364]
- Natural Science and Engineering Research Council of Canada (NSERC)
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We carried out experimental investigations on surface plasmon enhanced electron acceleration with few-cycle, carrier-envelope phase (CEP) stabilized laser pulses. We determined the spectrum of electrons accelerated in the plasmonic field and found that signatures of the phase stabilized optical waveform driving the individual electron trajectories are washed out in the electron spectra. We attribute this effect to nanoscale surface roughness of the metallic samples, as supported by extensive numerical simulations. This finding explains the previously observed, low CEP sensitivity of photoemission processes from metallic films and enables the development of femtosecond electron sources for ultrafast time-resolved applications. (C) 2011 American Institute of Physics.
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