| DOI | Resolve DOI: https://doi.org/10.1109/JSTQE.2020.3013532 |
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| Author | Search for: Melati, Daniele1ORCID identifier: https://orcid.org/0000-0002-3427-0186; Search for: Kamandar Dezfouli, Mohsen1; Search for: Grinberg, Yuri2; Search for: Schmid, Jens H.1; Search for: Cheriton, Ross1; Search for: Janz, Siegfried1; Search for: Cheben, Pavel1; Search for: Xu, Dan-Xia1 |
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| Affiliation | - National Research Council of Canada. Advanced Electronics and Photonics
- National Research Council of Canada. Digital Technologies
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| Format | Text, Article |
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| Subject | gratings; couplings; diffraction; optimization; phased arrays; optical coupling; antennas; diffraction gratings; elemental semiconductorsr; integrated optoelectronics; learning (artificial intelligence); micro-optics; optical design techniques; optical engineering computing; optical fibre couplers; optimisation; silicon; silicon-on-insulator |
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| Abstract | Compact and efficient optical antennas are fundamental components for many applications, including high-density fiber-chip coupling and optical phased arrays. Here we present the design of grating-based micro-antennas with perfectly vertical emission in the 300-nm silicon-on-insulator platform. We leverage a methodology combining adjoint optimization and machine learning dimensionality reduction to efficiently map the multiparameter design space of the antennas, analyse a large number of relevant performance metrics, carry out the required multi-objective optimization, and discover high performance designs. Using a one-step apodized grating we achieve a vertical upward diffraction efficiency of almost 92% with a 3.6 μm-long antenna. When coupled with an ultra-high numerical aperture fiber, the antenna exhibits a coupling efficiency of more than 81% (-0.9 dB) and a 1-dB bandwidth of almost 158 nm. The reflection generated by the perfectly vertical antenna is smaller than -20 dB on a 200-nm bandwidth centered at λ = 1550 nm. |
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| Publication date | 2020-07-31 |
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| Publisher | IEEE |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 7a297364-9f23-4bc2-abc6-c2180b7fc55f |
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| Record created | 2021-07-29 |
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| Record modified | 2021-07-29 |
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