Spatiotemporal Characterization of SPP Pulse Propagation in Two-Dimensional Plasmonic Focusing Devices

• Published in: Nano letters 2013-03, Vol.13 (3), p.1053-1058
• Main Authors: Lemke, Christoph, Schneider, Christian, Leißner, Till, Bayer, Daniela, Radke, Jörn W, Fischer, Alexander, Melchior, Pascal, Evlyukhin, Andrey B, Chichkov, Boris N, Reinhardt, Carsten, Bauer, Michael, Aeschlimann, Martin
• Format: Article
• Language: English
• Subjects: Collective excitations (including excitons, polarons, plasmons and other charge-density excitations); Condensed matter: electronic structure, electrical, magnetic, and optical properties; Devices; Dynamics; Electron and ion emission by liquids and solids; impact phenomena; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Evolution; Exact sciences and technology; Femtosecond; Interfaces, heterostructures, nanostructures; Nanostructure; Photoemission; Photoemission and photoelectron spectra; Physics; Plasmonics; Surface and interface electron states; Two dimensional; Wave packets
• ISSN: 1530-6984; 1530-6992
• DOI: 10.1021/nl3042849

The spatiotemporal evolution of a SPP wave packet with femtosecond duration is experimentally investigated in two different plasmonic focusing structures. A two-dimensional reconstruction of the plasmonic field in space and time is possible by the numerical analysis of interferometric time-resolved photoemission electron microscopy data. We show that the time-integrated and time-resolved view onto the wave packet dynamics allow one to characterize and compare the capabilities of two-dimensional components for use in plasmonic devices operating with ultrafast pulses.