Self-phase modulation in photonic-crystal-slab line-defect waveguides
Self-phase modulation in photonic-crystal-slab line-defect waveguides
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DOI：
10.1063/1.2746068
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发表时间：
2007-06
影响因子：
4
通讯作者：
H. Oda;Kuon Inoue;Y. Tanaka;N. Ikeda;Y. Sugimoto;H. Ishikawa;K. Asakawa
中科院分区：
文献类型：
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作者：
H. Oda;Kuon Inoue;Y. Tanaka;N. Ikeda;Y. Sugimoto;H. Ishikawa;K. Asakawa
作者在AlxGa 1 − xAs基光子晶体平板线缺陷波导中观察到1.50μm谱域的自相位调制。采用x=0.18的样品使作者能够避免双光子吸收，导致不希望的自由载流子诱导的折射率变化。理论模拟很好地再现了观测光谱随输入脉冲峰值功率的变化。他们发现，由于严格的光限制，2.5pJ的1.6ps光脉冲足以在1mm长的样品中引起π的相移，并且由于瞬时光学克尔效应引起的非线性折射率n2为（3.8±1.2）×10− 13cm 2 scinW。讨论了利用N2研制超快全光开关的可能性
The authors observed self-phase modulation in spectral domain at 1.50μm in AlxGa1−xAs-based photonic-crystal-slab line-defect waveguides. Adopting a sample with x=0.18 has enabled the authors to avoid two-photon absorption, causing undesirable free-carrier-induced refractive-index change. Variation of the observed spectrum with input pulse peak power is well reproduced by theoretical simulation. They find that a 1.6ps light pulse of 2.5pJ suffices for causing a phase shift of π in a 1mm long sample owing to tight light confinement and nonlinear refractive index n2 due to instantaneous optical Kerr effect is (3.8±1.2)×10−13cm2∕W. A possibility of developing ultrafast all-optical switch due to n2 is discussed