Non-trivial scaling of self-phase modulation and three-photon absorption in III-V photonic crystal waveguides
Non-trivial scaling of self-phase modulation and three-photon absorption in III-V photonic crystal waveguides
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DOI：
10.1364/oe.17.022442
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发表时间：
2009-12-07
期刊：
影响因子：
3.8
通讯作者：
De Rossi, Alfredo
中科院分区：
文献类型：
--
作者：
Husko, Chad;Combrie, Sylvain;De Rossi, Alfredo
研究了双光子吸收被抑制的光子晶体光波导的非线性响应。群速度的适度降低(类似于c/6到c/15，系数为2.5)导致三光子吸收的显著(X 30)增强，远远超出预期的标度，与1/v(G)(3)成比例。有效非线性系数的这种非平凡标度是由脉冲压缩引起的，这进一步增强了光场而不是纯粹的慢群速度相互作用。由于强烈的反常群速度色散和正啁啾，这些观察在毫米长的慢光光子晶体波导中是可能的。我们的数值物理模型与测量结果非常吻合。(C)2009年美国光学学会
We investigate the nonlinear response of photonic crystal waveguides with suppressed two-photon absorption. A moderate decrease of the group velocity (similar to c/6 to c/15, a factor of 2.5) results in a dramatic (x 30) enhancement of three-photon absorption well beyond the expected scaling, proportional to 1/v(g)(3). This non-trivial scaling of the effective nonlinear coefficients results from pulse compression, which further enhances the optical field beyond that of purely slow-group velocity interactions. These observations are enabled in mm-long slow-light photonic crystal waveguides owing to the strong anomalous group-velocity dispersion and positive chirp. Our numerical physical model matches measurements remarkably. (C) 2009 Optical Society of America