Self-induced optical modulation of the transmission through a high-Q silicon microdisk resonator
Self-induced optical modulation of the transmission through a high-Q silicon microdisk resonator
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DOI：
10.1364/opex.14.000817
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发表时间：
2006-01-23
期刊：
影响因子：
3.8
通讯作者：
Painter, O
中科院分区：
文献类型：
--
作者：
Johnson, TJ;Borselli, M;Painter, O
本文报道了通过高q硅微盘谐振器对传输光功率进行低功率自诱导调制的直接时域观测结果。在阈值输入功率为60 μ W以上时，传输随波长的变化偏离了简单的光学双稳行为，传输强度在本质上变得高度振荡。传输振荡由一系列宽度约为100 ns、周期接近1 μ s的急剧传输衰减组成。我们建立了一个包含热动力学和自由载流子动力学的系统模型，并将其与观察到的行为进行了比较。结果表明，自诱导光调制是由于微盘内自由载流子种群和声子种群之间的非线性相互作用。
Direct time-domain observations are reported of a low-power, self-induced modulation of the transmitted optical power through a high-Q silicon microdisk resonator. Above a threshold input power of 60 mu W the transmission versus wavelength deviates from a simple optical bistability behavior, and the transmission intensity becomes highly oscillatory in nature. The transmission oscillations are seen to consist of a train of sharp transmission dips of width approximately 100 ns and period close to 1 mu s. A model of the system is developed incorporating thermal and free-carrier dynamics, and is compared to the observed behavior. Good agreement is found, and the self-induced optical modulation is attributed to a nonlinear interaction between competing free-carrier and phonon populations within the microdisk.