具有厘米级传播长度的混合等离子体波导用于纳米级光学限制。

Hybrid plasmonic waveguide with centimeter-scale propagation length for nanoscale optical confinement.

作者信息

Dahiya Sandeep, Kumar Suresh, Kaushik B K

出版信息

Appl Opt. 2016 Dec 20;55(36):10341-10346. doi: 10.1364/AO.55.010341.

DOI:10.1364/AO.55.010341

Abstract

A centimeter-scale hybrid plasmonic waveguide (HPW) structure based on a grating is proposed at telecom wavelengths. The high-contrast grating is formed by Si and air placed in an air slot created in the high-index region for attaining nanoscale optical confinement. High-contrast gratings help enhance the propagation length up to 3.6 cm with very low loss of 0.11 dB/mm. Further, the extremely large figure of merit 1,129,623 (>10) with nanoscale confinement of 0.00081/μm is introduced. In the present work, finite-element-method-based COMSOL Multiphysics software was applied to simulate and analyze the properties of a HPW structure. The proposed HPW device can be used for next-generation applications of nanolasers and modulators.

摘要

在电信波长下，提出了一种基于光栅的厘米级混合等离子体波导（HPW）结构。高对比度光栅由硅和空气形成，放置在高折射率区域中创建的空气槽内，以实现纳米级光学限制。高对比度光栅有助于将传播长度提高到3.6厘米，同时具有非常低的0.11 dB/mm的损耗。此外，还引入了具有0.00081/μm纳米级限制的极大品质因数1,129,623（>10）。在本工作中，应用基于有限元方法的COMSOL Multiphysics软件来模拟和分析HPW结构的特性。所提出的HPW器件可用于纳米激光器和调制器的下一代应用。