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 Gallacher, Dr Kevin and Paul, Professor Douglas
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