Berlin 2015 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 90: Sensing, Active Structures and other Applications
O 90.1: Vortrag
Donnerstag, 19. März 2015, 15:00–15:15, MA 144
Active Plasmonics using Molecular Switches — •Malte Großmann1, Alwin Klick1, Christoph Lemke1, Mehdi Hedayati Keshavarz2, Ahnaf Usman Zillohu2, Jacek Fiutowski3, Arkadiusz Goszczak3, Jacob Kjelstrup-Hansen3, Mady Elbahri2, Franz Faupel2, Horst-Günter Rubahn3, and Michael Bauer1 — 1Institute for Experimental and Applied Physics, University of Kiel, Germany — 2Faculty of Engineering, NanoSYD, University of Kiel, Germany — 3Mads Clausen Institute, NanoSYD, University of Southern Denmark, Denmark
Photochromic molecules have been successfully used in the past to achieve reversible control of optical transmission [1] and plasmonic damping [2] at metal-dielectric interfaces. In this paper we provide experimental evidence that in the same manner also the propagation of surface plasmon polaritons (SPP) can be steered. Switchable metal-dielectric interfaces are prepared from a gold substrate coated with polysterene films doped with spirophenanthrooxazine molecules. Changes in the SPP dispersion relation at illumination with light of different wavelength are measured using photoemission electron microscopy [3] evidencing a substantial and reversible switching of SPP group and phase velocity. The results imply the realization of nonvolatile plasmonic switching units providing new and complex functionalities.
[1] M. Jamali et al., Adv. Materials 23 (2011), 4243.
[2] R.A. Pala et al., Nano Lett.8 ( 2008), 1506.
[3] C. Lemke et al., Appl. Phys. B 116 (2013), 585.