期刊
NATURE COMMUNICATIONS
卷 6, 期 -, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/ncomms8027
关键词
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资金
- U.S. Air Force Office of Scientific Research [FA9550-08-1-0394]
- DARPA [N66001-12-1-4246]
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- Young Thousand Talents program of China, Jiangsu Specially Appointed Professor program
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1542152] Funding Source: National Science Foundation
Silicon photonics holds great promise for low-cost large-scale photonic integration. In its future development, integration density will play an ever-increasing role in a way similar to that witnessed in integrated circuits. Waveguides are perhaps the most ubiquitous component in silicon photonics. As such, the density of waveguide elements is expected to have a crucial influence on the integration density of a silicon photonic chip. A solution to high-density waveguide integration with minimal impact on other performance metrics such as crosstalk remains a vital issue in many applications. Here, we propose a waveguide superlattice and demonstrate advanced superlattice design concepts such as interlacing-recombination that enable high-density waveguide integration at a half-wavelength pitch with low crosstalk. Such waveguide superlattices can potentially lead to significant reduction in on-chip estate for waveguide elements and salient enhancement of performance for important applications, opening up possibilities for half-wavelength-pitch optical-phased arrays and ultra-dense space-division multiplexing.
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