期刊
OPTICS EXPRESS
卷 18, 期 23, 页码 24206-24212出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.18.024206
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资金
- Hungarian Scientific Research Fund [73728, 81364]
- Natural Sciences and Engineering Research Council of Canada
We present experimental evidence of the generation of few-cycle propagating surface plasmon polariton wavepackets. These ultrashort plasmonic pulses comprised of only 2-3 field oscillations were characterized by an autocorrelation measurement based on electron photoemission. By exploiting plasmonic field enhancement, we achieved plasmon-induced tunnelling emission from the metal surface at low laser intensity, opening perspectives for strong-field experiments with low pulse energies. All-optical electron acceleration up to keV kinetic energy is also demonstrated in these surface-confined, few-cycle fields with only 1.35 x 10(12) W/cm(2) focused laser intensity. The experimental results are found to be in excellent agreement with the model. (C) 2010 Optical Society of America
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