Experimental Realization of Two Decoupled Directional Couplers in a Subwavelength Packing by Adiabatic Elimination
- 13 October 2015
- journal article
- research article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 15 (11), 7383-7387
- https://doi.org/10.1021/acs.nanolett.5b02790
Abstract
On-chip optical data processing and photonic quantum integrated circuits require the integration of densely packed directional couplers at the nanoscale. However, the inherent evanescent coupling at this length scale severely limits the compactness of such on-chip photonic circuits. Here, inspired by the adiabatic elimination in a N-level atomic system, we report an experimental realization of a pair of directional couplers that are effectively isolated from each other despite their subwavelength packing. This approach opens the way to ultradense arrays of waveguide couplers for integrated optical and quantum logic gates.Keywords
Funding Information
- Division of Materials Research (DMR-1210170)
- Office of Naval Research (N00014-13-1-0678)
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