20 November 2012 MHz isolated XUV attosecond pulses generation using plasmonic enhancement in asymmetric metallic nanoantenna
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Abstract
We theoretically investigate utilizing the enhanced plasmonic fields in metallic nanostructures. Numerical techniques are employed to optimize nanoantennas to attain the enhanced plasmonic fields up to 270. In the volume of 15 × 15 × 30 nm3 in nanoantenna, the intensity could be enhanced to 1014 W/cm2 for high harmonic generation (HHG). Optimal conditions for the production of MHz isolated attosecond pulse of 140 attosecond via HHG have been identified. These findings open up the possibility for the development of a compact source of ultrashort XUV pulses with MHz repetition rates. our simulations indicate a potential route towards the temporal shaping of the plasmonic near-field and in turn the generation of single attosecond pulses. Such XUV sources, which may operate at MHz repetition rate, could find applications in high-precision spectroscopy and for spatio-time-resolved measurements of collective electron dynamics on nanostructured surfaces. Moreover, the asymmetric cross nanoantennas is proposed to control the polarizations and select the wavelengths via varying the ratio of nanoantennas and generate the XUV pulse in both polarized direction.
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Ying-Ying Yang, Wei Sun, Qian-Guang Li, Ling Zhang, Hai-Juan Yu, Xue-Chun Lin, "MHz isolated XUV attosecond pulses generation using plasmonic enhancement in asymmetric metallic nanoantenna", Proc. SPIE 8564, Nanophotonics and Micro/Nano Optics, 856421 (20 November 2012); doi: 10.1117/12.2001113; https://doi.org/10.1117/12.2001113
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