Direct measurement of the group index of photonic crystal waveguides via Fourier transform spectral interferometry
Direct measurement of the group index of photonic crystal waveguides via Fourier transform spectral interferometry
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DOI：
10.1063/1.2752761
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发表时间：
2007-06-25
影响因子：
4
通讯作者：
Krauss, Thomas F.
中科院分区：
文献类型：
--
作者：
Gomez-Iglesias, Alvaro;O'Brien, David;Krauss, Thomas F.
作者报道了一种直接的，单次测量的光子晶体波导的群折射率分布，结合光谱干涉法与傅里叶变换分析。这种技术的多功能性使他们能够解决色散的微妙变化，并量化光子晶体波导模式截止处的“慢光”效应。对于99 μ m长的波导，它们测得的群折射率高达85，而对于397和695 μ m长的波导，它们测得的最大值分别为30和25。这些结果显示了传输特性与光子晶体中观察到的最大群延迟之间的关系。(c)2007年，美国物理学会。
The authors report a direct, single-shot measurement of the group index profile of photonic crystal waveguides, combining spectral interferometry with Fourier transform analysis. This technique's versatility allows them to resolve subtle changes in dispersion and to quantify the "slow light" effect at the photonic crystal waveguide mode cutoff. For a waveguide 99 mu m long, they measure a group index up to 85, whereas for lengths of 397 and 695 mu m, they measure maximum values of 30 and 25, respectively. These results show the relationship between transmission characteristics and the maximum group delay observed in photonic crystals. (c) 2007 American Institute of Physics.