Journal
OPTICS LETTERS
Volume 41, Issue 21, Pages 4939-4942Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.41.004939
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Funding
- National Basic Research Program of China (973) [2014CB340104/3]
- National Natural Science Foundation of China (NSFC) [61377076, 61307085, 61335005]
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We propose a new type of bilayer dispersion-flattened waveguides that have four zero-dispersion wavelengths. Low and flat dispersion can be achieved by using two different material combinations, with a much smaller index contrast as compared to the previously proposed slot-assisted dispersion-flattened waveguides. Without using a nano-slot, dispersion becomes less sensitive to waveguide dimensions, which is highly desirable for high-yield device fabrication. Ultra-low dispersion, high nonlinearity, and fabrication-friendly design would make it promising for practical implementation of nonlinear photonic functions. The proposed waveguide configuration deepens our understanding of the dispersion flattening principle. (C) 2016 Optical Society of America
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