High-density waveguide superlattices with low crosstalk

Weiwei Song, Robert Gatdula, Siamak Abbaslou, Ming Lu, Aaron Stein, Warren Y-C Lai, J. Provine, R. Fabian W. Pease, Demetrios N. Christodoulides and Wei Jiang ()
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Weiwei Song: Rutgers University
Robert Gatdula: Rutgers University
Siamak Abbaslou: Rutgers University
Ming Lu: Center for Functional Nanomaterials, Brookhaven National Laboratory
Aaron Stein: Center for Functional Nanomaterials, Brookhaven National Laboratory
Warren Y-C Lai: Rutgers University
J. Provine: Stanford University
R. Fabian W. Pease: Stanford University
Demetrios N. Christodoulides: School of Optics/CREOL, University of Central Florida
Wei Jiang: Rutgers University

Nature Communications, 2015, vol. 6, issue 1, 1-9

Abstract: Abstract 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.

Date: 2015
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DOI: 10.1038/ncomms8027

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