| Download | - View final version: Breaking the coupling efficiency–bandwidth trade‐off in surface grating couplers using zero‐order radiation (PDF, 1.2 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1002/lpor.202000542 |
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| Author | Search for: Sánchez‐Postigo, AlejandroORCID identifier: https://orcid.org/0000-0003-4782-0105; Search for: Halir, Robert; Search for: Wangüemert‐Pérez, J. Gonzalo; Search for: Ortega‐Moñux, Alejandro; Search for: Wang, Shurui1; Search for: Vachon, Martin1; Search for: Schmid, Jens H.1; Search for: Xu, Dan‐Xia1; Search for: Cheben, Pavel1; Search for: Molina‐Fernández, Íñigo |
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| Affiliation | - National Research Council of Canada. Advanced Electronics and Photonics
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| Funder | Search for: Universidad de Málaga; Search for: Ministerio de Ciencia, Innovación y Universidades; Search for: National Research Council of Canada |
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| Format | Text, Article |
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| Abstract | Silicon photonics provides wafer-scale fabrication of densely integrated photonic circuits that are enabling breakthrough applications in datacom, artificial intelligence, and healthcare. The sub-micrometer mode size of silicon waveguides makes efficient coupling to conventional single mode fibers extremely challenging. While advanced surface grating couplers can achieve sub-decibel coupling efficiencies, their operation relies on diffraction phenomena, which intrinsically limit the operational bandwidth. Here a novel type of surface coupler is experimentally demonstrated that overcomes the efficiency-bandwidth limitation of conventional diffraction gratings by harnessing zero-order radiation from a subwavelength metamaterial waveguide to a tilted silicon prism. The device achieves a coupling efficiency above 80% to an SMF-28 fiber in a record 1-dB bandwidth beyond 90 nm, opening new venues for highly efficient broadband fiber-to-chip surface coupling in silicon photonics. |
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| Publication date | 2021-05-05 |
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| Publisher | Wiley Online Library |
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| Licence | |
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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 | ae2e6f5a-f691-44ca-aa4c-a93ebdbccafe |
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| Record created | 2022-09-23 |
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| Record modified | 2023-03-16 |
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