标题： 光纤锥耦合的硅光子晶体微谐振器中的非线性吸收和色散 显示英文标题

标题： Nonlinear absorption and dispersion in fiber-taper-coupled silicon photonic crystal microresonators

摘要： 一种技术被展示，该技术能够高效地在锥形标准单模光纤和高Q值、超小模式体积的硅光子晶体共振腔之间传输光。测量得到腔模质量因子为47000，并展示了44%的总光纤到腔耦合效率。利用这种高效的腔输入和输出通道，研究了光子晶体腔的稳态非线性吸收和色散。观察到光纤输入功率低至250 \mu W时出现光学双稳态，对应的下转换功率为100 \mu W，腔内存储能量为3 fJ。还从功率依赖的损耗和色散测量中估计出这些硅光子晶体谐振器的有效自由载流子寿命为0.5 ns。 显示英文摘要

摘要： A technique is demonstrated which efficiently transfers light between a tapered standard single-mode optical fiber and a high-Q, ultra-small mode volume, silicon photonic crystal resonant cavity. Cavity mode quality factors of 47000 are measured, and a total fiber-to-cavity coupling efficiency of 44% is demonstrated. Using this efficient cavity input and output channel, the steady-state nonlinear absorption and dispersion of the photonic crystal cavity is studied. Optical bistability is observed for fiber input powers as low as 250 \mu W, corresponding to a dropped power of 100 \mu W and 3 fJ of stored cavity energy. A high-density effective free-carrier lifetime for these silicon photonic crystal resonators of 0.5 ns is also estimated from power dependent loss and dispersion measurements.