Nonlinearities in porous silicon optical waveguides at 1550 nm

被引：33
作者：
Apiratikul, Paveen [1 ]
Rossi, Andrea M. [1 ,2 ]
Murphy, Thomas E. [1 ]
机构：
[1] Univ Maryland, College Pk, MD 20742 USA
[2] Ist Nazl Ric Metrol, I-10135 Turin, Italy
来源：
OPTICS EXPRESS | 2009年 / 17卷 / 05期
基金：
美国国家科学基金会;
关键词：
SELF-PHASE-MODULATION; 2-PHOTON ABSORPTION;
D O I：
10.1364/OE.17.003396
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report an experimental investigation of the nonlinear optical properties of nanoporous silicon optical waveguides measured at 1550 nm. The nonlinear properties including two-photon absorption, self-phase modulation, free-carrier absorption and free-carrier plasma dispersion are characterized and compared with similar measurements conducted on a conventional silicon-on-insulator ridge waveguide. Our study reveals that even waveguides that are 70% porous exhibit two-photon absorption and self-phase modulation coefficients that are comparable to those of crystalline silicon. The free-carrier absorption and dispersion in porous silicon waveguides are found to be significantly faster, and stronger than those reported for crystalline silicon. (c) 2009 Optical Society of America
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收藏
页码：3396 / 3406
页数：11
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