Efficient terahertz-wave generation via four-wave mixing in silicon membrane waveguides
Efficient terahertz-wave generation via four-wave mixing in silicon membrane waveguides
复制标题
通过硅膜波导中的四波混频高效产生太赫兹波
DOI：
10.1364/oe.20.008920
复制
发表时间：
2012-04-09
期刊：
影响因子：
3.8
通讯作者：
Wen, Jin
中科院分区：
文献类型：
--
作者：
Wang, Zhaolu;Liu, Hongjun;Wen, Jin
从理论上研究了中红外激光脉冲在硅膜波导中通过四波混频产生太赫兹波。传统的硅波导中基于FWM的参数放大或波长转换需要位于异常群速度色散（GVD）区的泵浦波长来实现宽相位匹配，相比而言，通过FWM产生太赫兹波需要位于正常GVD区的泵浦波长来实现共线相位匹配。硅膜波导的泵浦波长和肋高可调以获得宽带相位匹配。此外，研究了不同泵浦波长和硅膜波导肋高下产生太赫兹波的转换效率，可以获得效率超过1%的宽带太赫兹波。(C) 2012美国光学学会
Terahertz (THz) wave generation via four-wave mixing (FWM) in silicon membrane waveguides is theoretically investigated with mid-infrared laser pulses. Compared with the conventional parametric amplification or wavelength conversion based on FWM in silicon waveguides, which needs a pump wavelength located in the anomalous group-velocity dispersion (GVD) regime to realize broad phase matching, the pump wavelength located in the normal GVD regime is required to realize collinear phase matching for the THz-wave generation via FWM. The pump wavelength and rib height of the silicon membrane waveguide can be tuned to obtain a broadband phase matching. Moreover, the conversion efficiency of the THz-wave generation is studied with different pump wavelengths and rib heights of the silicon membrane waveguides, and broadband THz-wave can be obtained with high efficiency exceeding 1%. (C) 2012 Optical Society of America