| Autor: |
Galina Georgieva, Karsten Voigt, Anna Peczek, Christian Mai, Lars Zimmermann |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Journal of the European Optical Society-Rapid Publications, Vol 16, Iss 1, Pp 1-11 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
1990-2573 |
| DOI: |
10.1186/s41476-020-00129-4 |
| Popis: |
Abstract Focusing grating couplers for the excitation of the fundamental transverse-magnetic (TM) mode in integrated silicon photonic waveguides are designed and characterized under the boundary conditions of a photonic BiCMOS foundry. Two types of waveguide geometries are considered – a nanowire and a rib waveguide. Wafer-scale experimental results for nanowire TM grating couplers are in excellent agreement with numerical investigations and demonstrate a robust behavior on the wafer. The mean coupling loss and the 3σ interval are -3.9 ± 0.3 dB. The on wafer variation is three times lower than for the fundamental transverse-electric (TE) polarization. Similarly, the coupling in rib waveguides is examined as well. The results indicate that the rib waveguides require a modified geometry when designed for TM. In general, the nanowire waveguide type is more suitable for TM coupling, showing a stable and repeatable performance. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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