Strong-field photoemission from nanostructuresdriven by few-cycle mid-infrared fields

Abstract

We present strong-field photoemission from plasmonic nanotips driven by ultrashort pulses at wavelengths of 0.8-8μm, reaching Keldysh parameters down to 0.1. We identify a sub-cycle acceleration regime that is exclusive to confined fields in nanostructures. © Owned by the authors, published by EDP Sciences, 2013.