| Download | - View accepted manuscript: Refractive index engineering with subwavelength gratings for efficient microphotonic couplers and planar waveguide multiplexers (PDF, 762 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1364/OL.35.002526 |
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| Author | Search for: Cheben, Pavel1ORCID identifier: https://orcid.org/0000-0003-4232-9130; Search for: Bock, Przemek J.; Search for: Schmid, Jens H.2; Search for: Lapointe, Jean1; Search for: Janz, Siegfried1; Search for: Xu, Dan-Zia1; Search for: Densmore, Adam2; Search for: Delâge, André1; Search for: Lamontagne, Boris1; Search for: Hall, Trevor J. |
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| Affiliation | - National Research Council of Canada. NRC Institute for Microstructural Sciences
- National Research Council of Canada. NRC Genomics and Health Initiative
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| Format | Text, Article |
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| Abstract | We use subwavelength gratings (SWGs) to engineer the refractive index in microphotonic waveguides, including practical components such as input couplers and multiplexer circuits. This technique allows for direct control of the mode confinement by changing the refractive index of a waveguide core over a range as broad as 1.6–3.5 by lithographic patterning. We demonstrate two experimental examples of refractive index engineering, namely, a microphotonic fiber-chip coupler with a coupling loss as small as ?0:9 dB and minimal wavelength dependence and a planar waveguide multiplexer with SWG nanostructure, which acts as a slab waveguide for light diffracted by the grating, while at the same time acting as a lateral cladding for the strip waveguide. This yields an operation bandwidth of 170 nm for a device size of only ~160 ?m × 100 ?m. |
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| Publication date | 2010-07-20 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 17355697 |
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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 | c4ed2c4b-1ed8-4a69-9b2e-d595ebe6422a |
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| Record created | 2011-03-22 |
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| Record modified | 2020-04-17 |
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