Optical Activation of Plasmonic Germanium Nanoantennas Resonant in the Mid-Infrared

Fischer, M. P. et al. (2015) Optical Activation of Plasmonic Germanium Nanoantennas Resonant in the Mid-Infrared. 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, Munich, Germany, 21-25 June 2015. EH₅₅. ISBN 9781467374750

Abstract

Plasmonics provides an elegant way to effectively couple optical radiation to single sub-wavelength quantum systems [1]. In particular, the mid-infrared vibrational fingerprint region is of particular interest for sensing large molecules of biological relevance. In this context, we introduce germanium as a novel material for active mid-IR plasmonics. Semiconductors offer the possibility to tune the plasma frequency by selection of the doping level. Moreover, the same effect can be achieved by ultrafast near-IR excitation of electron-hole pairs in intrinsic Ge [2]. This approach gives us full optical control over the plasmonic resonance in nanoantennas.

• Item Type: Conference or Workshop Item
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Samarelli, Mr Antonio and Paul, Professor Douglas
• Authors: Fischer, M. P., Schmidt, C., Stock, J., Sakat, E., Samarelli, A., Frigerio, J., Biagioni, P., Paul, D., Isella, G., Leitenstorfer, A., and Brida, D.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
• Publisher: Optical Society of America
• ISBN: 9781467374750