Journal
APPLIED PHYSICS LETTERS
Volume 109, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4962901
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Funding
- University of Illinois
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-FG0207ER46471]
- NSF CAREER [ECCS-1055941]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1055941] Funding Source: National Science Foundation
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We report an efficient method to introduce enhanced axial confinement in the self-rolled-up SiNx vertical microtube coupler by depositing a thin layer of high refractive index material strip within the coupling section and effectively forming a vertical microring. Three times wider mode spacing is observed in such a vertical microring coupler monolithically integrated with a silicon nitride ridge waveguide as compared to the one without such axial confinement. More importantly, single mode operation within the telecomm C-band and S-band is achieved. Published by AIP Publishing.
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