High-order harmonic generation driven by plasmonic fields: a new route towards the generation of UV and XUV photons?

International Conference on Many Particle Spectroscopy of Atoms, Molecules, Clusters and Surfaces 2014

Ciappina, M.F.^1 ; Pérez-Hernández, J.A.^2 ; Roso, L.^2 ; Zaïr, A.^3 ; Lewenstein, M.^4,5

Max Planck Institute for Quantum Optics, Hans-Kopfermann-Str. 1, Garching

D-85748, Germany^1

Centro de Láseres Pulsados (CLPU), Parque Científico, Villamayor, Salamanca

37185, Spain^2

Blackett Laboratory Laser Consortium, Imperial College London, London

SW7 2AZ, United Kingdom^3

ICFO-Institut de Ciències Fotòniques, Mediterranean Technology Park, Castelldefels

08860, Spain^4

ICREA-Institució Catalana de Recerca i Estudis Avançats, Lluis Companys 23, Barcelona

08010, Spain^5

关键词: Electron trajectories;    Few-cycle laser pulse;    High order harmonic generation;    Localized surface plasmon;    Metal nanostructure;    Metallic nanostructure;    Spatial dependencies;    Theoretical investigations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/601/1/012001/pdf
DOI  :  10.1088/1742-6596/601/1/012001

来源: IOP

【 摘 要 】

We present theoretical investigations of high-order harmonic generation (HHG) resulting from the interaction of noble gases with different kind of temporally and spatially synthesized laser fields. These fields, based on localized surface plasmons, are produced when, for instance, a metal nanoparticle or nanostructure, is illuminated by a few-cycle laser pulse. The enhanced field, which largely depends on the geometrical shape of the metallic nanostructure, has a strong spatial dependency in a scale comparable to the one where the electron dynamics takes place. We demonstrate that the spatial nonhomogeneous character of this laser field plays an important role in the HHG process and leads to a significant increase of the harmonic cutoff energy and modifications in the electron trajectories. The use of metal nanostructures appears to be an alternative way of generating coherent XUV light with a laser field whose characteristics can be spatially synthesized locally.