中文摘要：

硅基（SOI）波导是近年集成光电子和集成波导的重要方向。对硅基纳米波导进行数值计算,讨论了空气包层和SiO2包层两种情况的双模传输特性,得到两种包层结构的双模工作区域和双模拍长与波导结构的关系。研究了SOI纳米波导中双模干涉现象以及双折射和温度对双模干涉的影响。

英文摘要：

The cutoff properties of some lower-order modes of some nano silicon-on-insulator （SOI） waveguides with air cladding or Si02 cladding are analyzed. Operation regimes of no mode, single mode, and ：wo modes are obtained and demonstrated by using the cutoff wavelength and the waveguide width. The beat length, between the two modes with the same polarization in the two-mode regime, are shown as a function of the waveguide parameters. Two-mode interference and the effects of the birefringence as well as the temperature are discussed to show the potential applications of the SOI waveguides.