9 October 2012 Spatiotemporal characterization and control of lightfield nanolocalization on metallic nanostructures by nonlinear-PEEM
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The excitation of surface plasmons in metallic nanostructures by resonant ultrashort femtosecond light pulses produces interesting phenomena such as optical field nanolocalization, nanoscale electric field enhancement and ultrafast sub-femtosecond beating of the plasmon eigenmodes. Nonlinear two-photon photoemission electron microscopy has proven to be a powerful tool for spatiotemporal characterization of such effects on the nanoscale below the optical diffraction limit. As a step toward using intense, few-cycle 4 femtosecond laser pulses to excite and control surface plasmons, we report on the multiphoton-photoemission electron microscopy experiments on lithographically-fabricated gold nanostructures excited by these few-cycle laser pulses. In addition, the effects of the shape and size of silver plasmonic structures, as well as the polarization of the excitation source are examined in the two-photon photoemission induced by picosecond laser pulses. Potential approaches toward spatiotemporal control of lightfield nanolocalization are described.
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S. H. Chew, S. H. Chew, K. Pearce, K. Pearce, S. Nobis, S. Nobis, C. Späth, C. Späth, A. Spreen, A. Spreen, S. Radünz, S. Radünz, Y. Yang, Y. Yang, J. Schmidt, J. Schmidt, U. Kleineberg, U. Kleineberg, } "Spatiotemporal characterization and control of lightfield nanolocalization on metallic nanostructures by nonlinear-PEEM", Proc. SPIE 8457, Plasmonics: Metallic Nanostructures and Their Optical Properties X, 84571C (9 October 2012); doi: 10.1117/12.930020; https://doi.org/10.1117/12.930020

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