Gallacher, K. , Millar, R.W. , Griškevičiūte, U., Baldassarre, L., Sorel, M. , Ortolani, M. and Paul, D.J. (2018) Low loss Ge-on-Si waveguides operating in the 8–14 µm atmospheric transmission window. Optics Express, 26(20), pp. 25667-25675. (doi: 10.1364/OE.26.025667)
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Abstract
Germanium-on-silicon waveguides were modeled, fabricated and characterized at wavelengths ranging from 7.5 to 11 µm. Measured waveguide losses are below 5 dB/cm for both TE and TM polarization and reach values of ∼ 1 dB/cm for ≥ 10 µm wavelengths for the TE polarization. This work demonstrates experimentally for the first time that Ge-on-Si is a viable waveguide platform for sensing in the molecular fingerprint spectral region. Detailed modeling and analysis is presented to identify the various loss contributions, showing that with practical techniques losses below 1 dB/cm could be achieved across the full measurement range.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Hawley, Mrs Ugne and Paul, Professor Douglas and Millar, Dr Ross and Gallacher, Dr Kevin and Sorel, Professor Marc |
| Authors: | Gallacher, K., Millar, R.W., Griškevičiūte, U., Baldassarre, L., Sorel, M., Ortolani, M., 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: | Optics Express |
| Publisher: | Optical Society of America |
| ISSN: | 1094-4087 |
| ISSN (Online): | 1094-4087 |
| Published Online: | 18 September 2018 |
| Copyright Holders: | Copyright © 2018 The Optical Society |
| First Published: | First published in Optics Express 26(20): 25667-25675 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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