Experimental Realization of Two Decoupled Directional Couplers in a Subwavelength Packing by Adiabatic Elimination

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• 作者：Michael Mrejen ; Haim Suchowski ; Taiki Hatakeyama ; Yuan Wang ; Xiang Zhang
• 刊名：Nano Letters
• 出版年：2015
• 出版时间：November 11, 2015
• 年：2015
• 卷：15
• 期：11
• 页码：7383-7387
• 全文大小：384K
• ISSN：1530-6992

文摘

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.