Ge(Sn) nano-island photodetectors with plasmonic antennas.

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ID: 106437
2020
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Abstract
We report on photodetection in deep subwavelength Ge(Sn) nano-islands on Si nano pillar substrates, in which self aligned nano antennas in the Al contact metal are used to enhance light absorption by means of local surface plasmon resonances. The impact of parameters such as substrate doping and device geometry on the measured responsivities are investigated and our experimental results are supported by simulations of the three-dimensional distribution of the electromagnetic fields. Comparatively high optical responsivities of about 0.1 A/W are observed as a consequence of the excitation of localized surface plasmons, making our nano-island photodetectors interesting for applications, in which size reduction is essential.
Reference Key
schlykow2020gesnnanotechnology Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Schlykow, Viktoria;Manganelli, Costanza Lucia;Römer, Friedhard;Clausen, Catherina Johanna;Augel, Lion;Schulze, Joerg;Katzer, Jens;Schubert, Michael Andreas;Witzigmann, Bernd;Schroeder, Thomas;Capellini, Giovanni;Fischer, Inga Anita;
Journal Nanotechnology
Year 2020
DOI
10.1088/1361-6528/ab91ef
URL
Keywords
photodetector ge gesn localized surface plasmon resonances nanoheteroepitaxy

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