极化(电化学)
绝缘体上的硅
光学
功率分配器和定向耦合器
耦合强度
物理
联轴节(管道)
材料科学
硅
光电子学
凝聚态物理
物理化学
化学
冶金
作者
Hongnan Xu,Yaocheng Shi
出处
期刊:Optics Letters
[The Optical Society]
日期:2017-12-12
卷期号:42 (24): 5202-5202
被引量:34
摘要
Ultra-compact polarization-independent directional couplers are proposed and demonstrated on the silicon-on-insulator (SOI) platform. By using the subwavelength structure in the coupling region, the coupling strength is greatly enhanced only for TE polarization, so that the coupling strength could be equivalent between TE and TM polarizations. Both complete coupling and 3 dB splitting have been demonstrated. The coupling length could be as short as ∼3.75 μm. The measured excess losses and polarization dependence losses are <∼1 and <∼0.5 dB.
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