Monolithic On-chip Magneto-optical Isolator with 3 dB Insertion Loss and 40 dB Isolation Ratio
Monolithic On-chip Magneto-optical Isolator with 3 dB Insertion Loss and 40 dB Isolation Ratio
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DOI：
10.1021/acsphotonics.8b01257
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发表时间：
2018-12-01
期刊：
影响因子：
7
通讯作者：
Hu, Juejun
中科院分区：
文献类型：
--
作者：
Du, Qingyang;Wang, Chuangtang;Hu, Juejun
On-chip optical isolators constitute an essential building block for photonic integrated circuits (PICs). Here, we experimentally demonstrated a magneto-optical isolator monolithically integrated on silicon featuring 3 dB insertion loss and 40 dB isolation ratio, both of which represent significant improvements over state-of-the-art. The isolator is also fully passive and operates under a simple unidirectional magnetization scheme. Such superior performance is enabled through a three-way combination of a strip-loaded waveguide design, a compositionally optimized chalcogenide glass as the light guiding medium, and low-loss taper structures created via gray-scale lithographic processing. The device represents an important step toward a practical solution for on-chip isolation in PICs.
