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
引用
收藏
页码：3396 / 3406
页数：11
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