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, Xiang Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number7565
JournalNature Communications
StatePublished - 26 Jun 2015
Externally publishedYes


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