High-Density Waveguide Superlattices With Low Crosstalk

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.

Publication Date

5-11-2015

Publication Title

Nature Communications

Volume

6

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1038/ncomms8027

Socpus ID

84929190913 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84929190913

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