Germanium-on-silicon waveguides operating at mid-infrared wavelengths up to 85 μm
We report transmission measurements of germanium on silicon waveguides in the 7.5–8.5 μm wavelength range, with a minimum propagation loss of 2.5 dB/cm at 7.575 μm. However, we find an unexpected strongly increasing loss at higher wavelengths, potential causes of which we discuss in detail. We also...
| Main Authors: | , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2018
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| Online Access: | https://hdl.handle.net/10356/89763 http://hdl.handle.net/10220/46376 |
| _version_ | 1826112695965843456 |
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| author | Nedeljkovic, Milos Penades, Jordi Soler Mittal, Vinita Murugan, Ganapathy Senthil Khokhar, Ali Z. Littlejohns, Callum Carpenter, Lewis G. Gawith, Corin B. E. Wilkinson, James S. Mashanovich, Goran Z. |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Nedeljkovic, Milos Penades, Jordi Soler Mittal, Vinita Murugan, Ganapathy Senthil Khokhar, Ali Z. Littlejohns, Callum Carpenter, Lewis G. Gawith, Corin B. E. Wilkinson, James S. Mashanovich, Goran Z. |
| author_sort | Nedeljkovic, Milos |
| collection | NTU |
| description | We report transmission measurements of germanium on silicon waveguides in the 7.5–8.5 μm wavelength range, with a minimum propagation loss of 2.5 dB/cm at 7.575 μm. However, we find an unexpected strongly increasing loss at higher wavelengths, potential causes of which we discuss in detail. We also demonstrate the first germanium on silicon multimode interferometers operating in this range, as well as grating couplers optimized for measurement using a long wavelength infrared camera. Finally, we use an implementation of the “cut-back” method for loss measurements that allows simultaneous transmission measurement through multiple waveguides of different lengths, and we use dicing in the ductile regime for fast and reproducible high quality optical waveguide end-facet preparation. |
| first_indexed | 2024-10-01T03:11:09Z |
| format | Journal Article |
| id | ntu-10356/89763 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:11:09Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/897632020-03-07T13:57:28Z Germanium-on-silicon waveguides operating at mid-infrared wavelengths up to 85 μm Nedeljkovic, Milos Penades, Jordi Soler Mittal, Vinita Murugan, Ganapathy Senthil Khokhar, Ali Z. Littlejohns, Callum Carpenter, Lewis G. Gawith, Corin B. E. Wilkinson, James S. Mashanovich, Goran Z. School of Electrical and Electronic Engineering Silicon Technologies, Centre of Excellence DRNTU::Engineering::Electrical and electronic engineering Integrated Optics Infrared We report transmission measurements of germanium on silicon waveguides in the 7.5–8.5 μm wavelength range, with a minimum propagation loss of 2.5 dB/cm at 7.575 μm. However, we find an unexpected strongly increasing loss at higher wavelengths, potential causes of which we discuss in detail. We also demonstrate the first germanium on silicon multimode interferometers operating in this range, as well as grating couplers optimized for measurement using a long wavelength infrared camera. Finally, we use an implementation of the “cut-back” method for loss measurements that allows simultaneous transmission measurement through multiple waveguides of different lengths, and we use dicing in the ductile regime for fast and reproducible high quality optical waveguide end-facet preparation. Published version 2018-10-19T04:31:03Z 2019-12-06T17:32:56Z 2018-10-19T04:31:03Z 2019-12-06T17:32:56Z 2017 Journal Article Nedeljkovic, M., Penades, J. S., Mittal, V., Murugan, G. S., Khokhar, A. Z., Littlejohns, C., . . . Mashanovich, G. Z. (2017). Germanium-on-silicon waveguides operating at mid-infrared wavelengths up to 85 μm. Optics Express, 25(22), 27431-27441. doi:10.1364/OE.25.027431 1094-4087 https://hdl.handle.net/10356/89763 http://hdl.handle.net/10220/46376 10.1364/OE.25.027431 en Optics Express © 2017 The Author(s). Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. 11 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering Integrated Optics Infrared Nedeljkovic, Milos Penades, Jordi Soler Mittal, Vinita Murugan, Ganapathy Senthil Khokhar, Ali Z. Littlejohns, Callum Carpenter, Lewis G. Gawith, Corin B. E. Wilkinson, James S. Mashanovich, Goran Z. Germanium-on-silicon waveguides operating at mid-infrared wavelengths up to 85 μm |
| title | Germanium-on-silicon waveguides operating at mid-infrared wavelengths up to 85 μm |
| title_full | Germanium-on-silicon waveguides operating at mid-infrared wavelengths up to 85 μm |
| title_fullStr | Germanium-on-silicon waveguides operating at mid-infrared wavelengths up to 85 μm |
| title_full_unstemmed | Germanium-on-silicon waveguides operating at mid-infrared wavelengths up to 85 μm |
| title_short | Germanium-on-silicon waveguides operating at mid-infrared wavelengths up to 85 μm |
| title_sort | germanium on silicon waveguides operating at mid infrared wavelengths up to 85 μm |
| topic | DRNTU::Engineering::Electrical and electronic engineering Integrated Optics Infrared |
| url | https://hdl.handle.net/10356/89763 http://hdl.handle.net/10220/46376 |
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