Frigerio, J. et al. (2017) Optical properties of highly n-doped germanium obtained by in situ doping and laser annealing. Journal of Physics D: Applied Physics, 50(46), 465103. (doi: 10.1088/1361-6463/aa8eca)
|
Text
152046.pdf - Accepted Version 812kB |
Abstract
High n-type doping in germanium is essential for many electronic and optoelectronic applications especially for high performance Ohmic contacts, lasing and mid-infrared plasmonics. We report on the combination of in situ doping and excimer laser annealing to improve the activation of phosphorous in germanium. An activated n-doping concentration of 8.8 × 1019 cm−3 has been achieved starting from an incorporated phosphorous concentration of 1.1 × 1020 cm−3. Infrared reflectivity data fitted with a multi-layer Drude model indicate good uniformity over a 350 nm thick layer. Photoluminescence demonstrates clear bandgap narrowing and an increased ratio of direct to indirect bandgap emission confirming the high doping densities achieved.
Item Type: | Articles |
---|---|
Additional Information: | The research leading to these results has received funding from the European Union’s Seventh Framework Programme under grant agreement no. 613055. |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Paul, Professor Douglas and Millar, Dr Ross and Gallacher, Dr Kevin |
Authors: | Frigerio, J., Ballabio, A., Gallacher, K., Gilberti, V., Baldassarre, L., Millar, R., Milazzo, R., Maiolo, L., Minotti, A., Bottegoni, F., Biagioni, P., Paul, D., Ortolani, M., Pecora, A., Napolitani, E., and Isella, G. |
College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
Journal Name: | Journal of Physics D: Applied Physics |
Publisher: | IOP Publishing |
ISSN: | 0022-3727 |
ISSN (Online): | 1361-6463 |
Copyright Holders: | Copyright © 2017 IOP Publishing Ltd. |
First Published: | First published in Journal of Physics D: Applied Physics 50(46):465103 |
Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
University Staff: Request a correction | Enlighten Editors: Update this record