Two-photon absorption and all-optical modulation in germanium-on-silicon waveguides for the mid-infrared

被引：36
|
作者：
Shen, Li [1 ]
Healy, Noel [1 ]
Mitchell, Colin J. [1 ]
Penades, Jordi Soler [1 ]
Nedeljkovic, Milos [1 ]
Mashanovich, Goran Z. [1 ]
Peacock, Anna C. [1 ]
机构：
[1] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England
来源：
OPTICS LETTERS | 2015年 / 40卷 / 10期
基金：
英国工程与自然科学研究理事会;
关键词：
LASER; GAIN;
D O I：
10.1364/OL.40.002213
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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 <5 ps. (C) 2015 Optical Society of America
引用
收藏
页码：2213 / 2216
页数：4
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