Optical reconfiguration and polarization control in semicontinuous gold films close to the percolation threshold

Christian Frydendahl, Taavi Repän, Mathias Geisler, Sergey M. Novikov, Jonas Beermann, Andrei Lavrinenko, Sanshui Xiao, Sergey I. Bozhevolnyi, N. Asger Mortensen, Nicolas Stenger

Research output: Contribution to conferencePosterResearch

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Abstract

In this work we have studied the intrinsic and reconfigured optical properties of semi-continuous gold films, fabricated via a simple metal evaporation technique. We have prepared three films of nominal thicknesses 5, 6, and 7nm. After fabrication the films are illuminated in areas by scanning a fs-pulsed laser over the films (Fig. 1). This results in permament morphological changes in the films observed in a scanning transmission electron microscope (STEM), see Fig. 2. The laser writing also introduces a polarized feature in the transmission spectra of the films. We have performed electron energy-loss spectroscopy (EELS) measurements and extensive finite-element simulations of our sample morphologies to better understand the origin of this polarization effect as well as the distribution of plasmonic resonances with and without laser
writing.
Original languageEnglish
Publication date2017
Number of pages1
Publication statusPublished - 2017
Event8th International Conference on Surface Plasmon Photonics - Academia Sinica, Taipei, Taiwan, Province of China
Duration: 22 May 201726 May 2017

Conference

Conference8th International Conference on Surface Plasmon Photonics
LocationAcademia Sinica
CountryTaiwan, Province of China
CityTaipei
Period22/05/201726/05/2017

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