Adiabatic elimination-based coupling control in densely packed subwavelength waveguides

Michael Mrejen, Haim Suchowski, Taiki Hatakeyama, Chihhui Wu, Liang Feng, Kevin O’Brien, Yuan Wang and Xiang Zhang ()
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Michael Mrejen: NSF Nanoscale Science and Engineering Center (NSEC), University of California
Haim Suchowski: NSF Nanoscale Science and Engineering Center (NSEC), University of California
Taiki Hatakeyama: NSF Nanoscale Science and Engineering Center (NSEC), University of California
Chihhui Wu: NSF Nanoscale Science and Engineering Center (NSEC), University of California
Liang Feng: NSF Nanoscale Science and Engineering Center (NSEC), University of California
Kevin O’Brien: NSF Nanoscale Science and Engineering Center (NSEC), University of California
Yuan Wang: NSF Nanoscale Science and Engineering Center (NSEC), University of California
Xiang Zhang: NSF Nanoscale Science and Engineering Center (NSEC), University of California

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract The ability to control light propagation in photonic integrated circuits is at the foundation of modern light-based communication. However, the inherent crosstalk in densely packed waveguides and the lack of robust control of the coupling are a major roadblock toward ultra-high density photonic integrated circuits. As a result, the diffraction limit is often considered as the lower bound for ultra-dense silicon photonics circuits. Here we experimentally demonstrate an active control of the coupling between two closely packed waveguides via the interaction with a decoupled waveguide. This control scheme is analogous to the adiabatic elimination, a well-known procedure in atomic physics. This approach offers an attractive solution for ultra-dense integrated nanophotonics for light-based communications and integrated quantum computing.

Date: 2015
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DOI: 10.1038/ncomms8565

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