Department of Electrical and Computer Engineering, Yokohama National University, Yokohama 240-8501, Japan.
Proc Jpn Acad Ser B Phys Biol Sci. 2009;85(10):443-53. doi: 10.2183/pjab.85.443.
Slow light with a markedly low group velocity is a promising solution for optical buffering and advanced time-domain optical signal processing. It is also anticipated to enhance linear and nonlinear effects and so miniaturize functional photonic devices because slow light compresses optical energy in space. Photonic crystal waveguide devices generate on-chip slow light at room temperature with a wide bandwidth and low dispersion suitable for short pulse transmission. This paper first explains the delay-bandwidth product, fractional delay, and tunability as crucial criteria for buffering capacity of slow light devices. Then the paper describes experimental observations of slow light pulse, exhibiting their record high values. It also demonstrates the nonlinear enhancement based on slow light pulse transmission.
具有显著低群速度的慢光对于光缓冲和先进的时域光信号处理来说是一种很有前途的解决方案。它还有望增强线性和非线性效应，从而缩小功能光子器件的尺寸，因为慢光可以在空间中压缩光能量。光子晶体波导器件在室温下产生具有宽带宽和低色散的片上慢光，非常适合短脉冲传输。本文首先解释了延迟带宽积、分数延迟和可调性作为慢光器件缓冲能力的关键标准。然后，本文描述了慢光脉冲的实验观测，展示了它们的创纪录高值。还展示了基于慢光脉冲传输的非线性增强。
