摘要
表面等离子体可以在亚波长尺度上实现对可见光及红外光的控制处理,对光集成的发展有巨大的推动作用。文中设计了金属—介质—金属结构的表面等离子光波导,并利用时域有限差分法对其色散特性、群速度、场强分布进行分析。结果表明在一定的频率范围内,此结构的光波导可以支持慢光模式,且群速度色散较小,可以有效控制光脉冲的畸变,保持信号的完整性。
Surface plasmons can process visible light and infrared light in subwavelength scale, which provide a huge boost to development of optical integerated. The paper introduces the theoretical basis of the finite-difference time-domain method （FDTD） and designs a slow-light waveguide with MIM structure. Then, it presents a analysis of dispersion property and group velocity of this waveguide with FDTD. It is shown that the waveguide can supports slow light, propagation and suppress the pulse distortion into some tolerable value simultaneously, when setting the frequency in an appropriate region in the dispersion curve.
出处
《信息技术》
2013年第5期87-90,共4页
Information Technology
