中文摘要：

SOI纳米线波导具有对光场限制作用强、传输损耗低、弯曲半径小、集成度高、与传统CMOS工艺兼容等优点，采用SOI纳米线波导能够大大缩小光子器件的长度和面积，提高器件工作速度和效率，降低器件功耗。介绍了SOI纳米线波导在模式、损耗、偏振等方面与传统大尺寸硅基波导所表现出来的不同特性，评述了当前关于SOI纳米线波导和基于SOI纳米线波导光子器件的最新研究进展。

英文摘要：

SOI nanowire waveguides have advantages of strong optical confinement, low transmission loss, low bend radius, high integration density and fully compatible with CMOS technique, etc. The length and footprints of the devices based on these waveguides can be reduced, the operation speed and efficiency can be improved and the power can be lowered. The properties of mode, loss and polarization of SOI nanowire waveguides, which are different from those of conventional waveguides with large cross-section, are introduced. Recent progresses of SOI nanowire waveguides and several photonic devices based on these waveguides are reviewed.