title: Polarization gating and circularly-polarized high harmonic generation using plasmonic enhancement in metal nanostructures.
abstract: We investigate possibilities to utilize field enhancement by specifically designed metal nanostructures for the generation of single attosecond pulses using the polarization gating technique. We predict the generation of isolated 59-attosecond-long pulses using 15-fs pump pulses with only a 0.6 TW/cm2 intensity. Our simulations also indicate the possibility to generate previously inaccessible high-harmonics with circular polarization by using an ensemble of vertically and horizontally orientated bow-tie structures. In the numerical simulation we used an extended Lewenstein model, which includes the spatial inhomogeneity in the hot spots and collisions of electrons with the metal surface.
authors.affiliation: Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy Max, Berlin, Germany. gusakov@mbi-berlin.de
authors.forename: A
authors.initials: A
authors.lastname: Husakou
authors.forename: F
authors.initials: F
authors.lastname: Kelkensberg
authors.forename: J
authors.initials: J
authors.lastname: Herrmann
authors.forename: M J J
authors.initials: MJ
authors.lastname: Vrakking
mesh_terms: D003198:Computer Simulation; D008027:Light; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008956:Models, Chemical; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*