Optical activation of germanium plasmonic antennas in the mid-infrared

Fischer, M. P. et al. (2016) Optical activation of germanium plasmonic antennas in the mid-infrared. Physical Review Letters, 117(4), 047401. (doi:10.1103/PhysRevLett.117.047401)

Fischer, M. P. et al. (2016) Optical activation of germanium plasmonic antennas in the mid-infrared. Physical Review Letters, 117(4), 047401. (doi:10.1103/PhysRevLett.117.047401)

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Abstract

Impulsive interband excitation with femtosecond near-infrared pulses establishes a plasma response in intrinsic germanium structures fabricated on a silicon substrate. This direct approach activates the plasmonic resonance of the Ge structures and enables their use as optical antennas up to the mid-infrared spectral range. The optical switching lasts for hundreds of picoseconds until charge recombination redshifts the plasma frequency. The full behavior of the structures is modeled by the electrodynamic response established by an electron-hole plasma in a regular array of antennas.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Samarelli, Mr Antonio and Paul, Professor Douglas
Authors: Fischer, M. P., Schmidt, C., Sakat, E., Stock, J., Samarelli, A., Frigerio, J., Ortolani, M., Paul, D. J., Isella, G., Leitenstorfer, A., Biagioni, P., and Brida, D.
College/School:College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN:0031-9007
ISSN (Online):1079-7114
Copyright Holders:Copyright © 2016 American Physical Society
First Published:First published in Physical Review Letters 117(4):047401
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