Fabrication of mid-infrared plasmonic antennas based on heavily doped germanium thin films

Samarelli, A., Frigerio, J., Sakat, E., Baldassarre, L., Gallacher, K., Finazzi, M., Isella, G., Ortolani, M., Biagioni, P. and Paul, D.J. (2016) Fabrication of mid-infrared plasmonic antennas based on heavily doped germanium thin films. Thin Solid Films, 602, pp. 52-55. (doi:10.1016/j.tsf.2015.10.005)

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Abstract

In this work, the growth and the fabrication of heavily doped germanium plasmonic antennas for mid-infrared applications are reported. By tuning the phosphorus doping concentration and the antenna geometrical parameters, plasma frequencies for targeting the 8–15 μm spectral region are achieved. 1 μm thick, heavily doped (2.3 × 1019 cm− 3) germanium was used to fabricate dipole antennas of 800 nm width with a gap spacing of 300 nm which demonstrate resonance frequencies around 13 μm and 13.5 μm for 2 μm and 3 μm long structures, respectively. This technology has the potential to be used for mid-infrared sensing applications of hazardous gases and liquids.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Samarelli, Mr Antonio and Paul, Professor Douglas and Gallacher, Dr Kevin
Authors: Samarelli, A., Frigerio, J., Sakat, E., Baldassarre, L., Gallacher, K., Finazzi, M., Isella, G., Ortolani, M., Biagioni, P., and Paul, D.J.
College/School:College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Thin Solid Films
Publisher:Elsevier
ISSN:0040-6090
ISSN (Online):1879-2731
Published Online:09 October 2015
Copyright Holders:Copyright © 2015 Elsevier B.V.
First Published:First published in Thin Solid Films 602: 52-55
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
634451GEMINIDouglas PaulEuropean Commission (EC)613055ENG - ENGINEERING ELECTRONICS & NANO ENG