论文标题
具有高度限制模式的纳米结构光学波导
Nanostructured optical waveguide with a highly confined mode
论文作者
论文摘要
我们提出了一条在电信波长的传输线，横截面小至$λ^2/39 $，比优化的硅波导小1.6倍。所提出的线可以作为带等离子覆层的亚波纤维实现。线横截面的大幅下降是通过利用等离子准抗对称模式来实现的。所需的等离子覆层相当细，因此，损失是中等的，可以使用放大核心材料来补偿。这样的传输线可以在密度集成的光学系统中找到应用。
We propose a transmission line working at telecom wavelengths with cross section as small as $λ^2/39$, which is 1.6 times smaller than that of optimized silicon waveguide. The proposed line can be implemented as a subwavelength fiber with plasmonic cladding. This considerable decrease in the line cross section is achieved by utilizing a plasmonic quasi-antisymmetric mode. The required plasmonic cladding is rather thin, therefore, losses are moderate and could be compensated by using amplifying core materials. Such a transmission line can find applications in densely integrated optical systems.
