Two-photon absorption and all-optical modulation in germanium-on-silicon waveguides for the mid-infrared
Two-photon absorption and all-optical modulation in germanium-on-silicon waveguides for the mid-infrared
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DOI：
10.1364/ol.40.002213
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发表时间：
2015-05-15
期刊：
影响因子：
3.6
通讯作者：
Peacock, Anna C.
中科院分区：
文献类型：
--
作者：
Shen, Li;Healy, Noel;Peacock, Anna C.
通过双光子吸收（TPA）传输窗口，研究了硅上锗波导的非线性吸收特性。结果表明，锗波导中的TPA参数比硅波导中的峰值强得多，与在块状材料中进行的测量结果吻合得很好。利用带宽附近的大非线性吸收，实现了高效的全光调制，调制深度接近8 dB，响应时间短
The nonlinear absorption properties of a germanium-on-silicon waveguide have been characterized across the two-photon absorption (TPA) transmission window. The results show that the TPA parameters in germanium waveguides are much stronger than the peak values in silicon, in good agreement with selected measurements conducted in bulk materials. Exploiting the large nonlinear absorption near the bandedge, efficient all-optical modulation is achieved with a modulation depth of similar to 8 dB and a response time