Journal
SCIENCE
Volume 352, Issue 6287, Pages 805-809Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aaf1112
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Funding
- Australian Research Council Laureate Fellowship program [FL100100099]
- Australian Research Council Centre for Ultrahigh Bandwidth Devices for Optical Systems (CUDOS) [CE110001018]
- Australian Research Council [DE150101665]
- Australian Research Council [DE150101665] Funding Source: Australian Research Council
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Angular momentum division has emerged as a physically orthogonal multiplexing method in high-capacity optical information technologies. However, the typical bulky elements used for information retrieval from the overall diffracted field, based on the interference method, impose a fundamental limit toward realizing on-chip multiplexing. We demonstrate noninterference angular momentum multiplexing by using a mode-sorting nanoring aperture with a chip-scale footprint as small as 4.2 micrometers by 4.2 micrometers, where nanoring slits exhibit a distinctive outcoupling efficiency on tightly confined plasmonic modes. The nonresonant mode-sorting sensitivity and scalability of our approach enable on-chip parallel multiplexing over a bandwidth of 150 nanometers in the visible wavelength range. The results offer the possibility of ultrahigh-capacity and miniaturized nanophotonic devices harnessing angular momentum division.
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