Ultra-Compact Broadband Nanowire-to-Slot Waveguide Mode

被引：1
|
作者：
Qi, Ying [1 ]
An, Junming [1 ]
Wang, Yue [1 ]
Zhang, Xiaoguang [1 ]
机构：
[1] Chinese Acad Sci, Inst Semicond, State Key Lab Integrated Optoelect, Beijing 100083, Peoples R China
来源：
NANOPHOTONICS AND MICRO/NANO OPTICS II | 2014年 / 9277卷
关键词：
mode converter; silicon-on-insulator (SOI); Si nanowire waveguide; Si slot waveguide; coupling efficiency; CONFINING LIGHT; STRIP;
D O I：
10.1117/12.2071523
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A novel ultra-compact high-efficiency broadband mode converter between silicon (Si) nanowire and silicon slot waveguide based on Silicon-on-Insulator (SOI) is proposed in this paper. By introducing a gradual-width structure between Si nanowire and slot waveguide, the favorable transition between nanowire mode (Gaussian-like mode) and slot mode (non-Gaussian-like mode) can be obtained and then the coupling efficiency is improved. The structure is simulated and optimized by using the three-dimension Finite-Difference Time-Domain Method (3D-FDTD). The coupling efficiency of over 90% within bandwidth of over 600nm can be achieved by only 200nm-length converter which is the smallest size to our knowledge. This presented mode converter can meet the demand of ultra-compact, wavelength-insensitive of monolithic integration.
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页数：6
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