Time-domain measurement of picosecond light-pulse propagation in a two-dimensional photonic crystal-slab waveguide
Time-domain measurement of picosecond light-pulse propagation in a two-dimensional photonic crystal-slab waveguide
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DOI：
10.1063/1.1760224
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发表时间：
2004-05
影响因子：
4
通讯作者：
T. Asano;K. Kiyota;D. Kumamoto;B. Song;S. Noda
中科院分区：
文献类型：
--
作者：
T. Asano;K. Kiyota;D. Kumamoto;B. Song;S. Noda
利用皮秒光脉冲研究了二维光子晶体平板中线缺陷波导的光学特性。利用自相关方法成功地观测到了光脉冲在波导中传播的时域波形。波导的群速度直接由沿着波导沿着来回反射的光脉冲的群延迟时间确定。在波导模边缘附近的频率处观察到真空中光速的二十分之一的小群速度。还测量了群速度的频率依赖性，发现群速度色散比普通单模光纤大104-105倍。
The optical properties of line-defect waveguides in two-dimensional photonic crystal slabs are investigated using picosecond light pulses. Time-domain waveforms of the light pulse propagating through the waveguide are successfully observed using an autocorrelation method. The group velocity of the waveguide is directly determined from the group delay time for light pulses reflected back and forth along the waveguide. A small group velocity of one-twentieth the speed of light in vacuum is observed at a frequency near the edge of the waveguide mode. The frequency dependence of the group velocity is also measured, and the group-velocity dispersion is found to be larger than that of normal single-mode optical fibers by a factor of 104–105.