| DOI | Resolve DOI: https://doi.org/10.1364/OL.395292 |
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| Author | Search for: Kamandar Dezfouli, Mohsen1ORCID identifier: https://orcid.org/0000-0003-2151-2438; Search for: Grinberg, Yuri2; Search for: Melati, Daniele1ORCID identifier: https://orcid.org/0000-0002-3427-0186; Search for: Cheben, Pavel1ORCID identifier: https://orcid.org/0000-0003-4232-9130; Search for: Schmid, Jens H.1; Search for: Sánchez-Postigo, AlejandroORCID identifier: https://orcid.org/0000-0003-4782-0105; Search for: Ortega-Moñux, Alejandro; Search for: Wangüemert-Pérez, GonzaloORCID identifier: https://orcid.org/0000-0002-9201-4463; Search for: Cheriton, Ross1; Search for: Janz, Siegfried1; Search for: Xu, Dan-Xia1ORCID identifier: https://orcid.org/0000-0002-0490-5224 |
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| Affiliation | - National Research Council Canada. Advanced Electronics and Photonics
- National Research Council Canada. Digital Technologies
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| Format | Text, Article |
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| Subject | coupling efficiency; diffraction gratings; effective medium theory; grating couplers; space division multiplexing; subwavelength gratings |
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| Abstract | We present perfectly vertical grating couplers for the 220 nm silicon-on-insulator platform incorporating subwavelength metamaterials to increase the minimum feature sizes and achieve broadband low back-reflection. Our study reveals that devices with high coupling efficiencies are distributed over a wide region of the design space with varied back-reflections, while still maintaining minimum feature sizes larger than 100 nm and even 130 nm. Using 3D-finite-difference time-domain simulations, we demonstrate devices with broadband low back-reflection of less than −20dB over more than 100 nm bandwidth centered around the C-band. Coupling efficiencies of 72% and 67% are achieved for minimum feature sizes of 106 nm and 130 nm, respectively. These gratings are also more fabrication tolerant compared to similar designs not using metamaterials. |
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| Publication date | 2020-06-29 |
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| Publisher | OSA |
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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 | 2e8e489d-0fb7-495b-80dd-6d1b2909ff18 |
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| Record created | 2021-07-14 |
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| Record modified | 2021-07-14 |
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