Refractive index dynamics of quantum dot based waveguide electroabsorbers

被引：11
|
作者：
Piwonski, Tomasz [1 ,2 ]
Pulka, Jaroslaw [1 ,2 ]
Viktorov, Evgeny A. [1 ,2 ]
Huyet, Guillaume [1 ,2 ]
Houlihan, John [1 ,2 ,3 ]
机构：
[1] Tyndall Natl Inst, Cork, Ireland
[2] Cork Inst Technol, Dept Appl Phys, Cork, Ireland
[3] Waterford Inst Technol, Dept Comp Maths & Phys, Waterford, Ireland
来源：
APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 05期
基金：
爱尔兰科学基金会;
关键词：
LASERS;
D O I：
10.1063/1.3476347
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The refractive index dynamics of InAs/GaAs quantum dot based waveguide absorbers is studied using heterodyne pump-probe measurements. Absorption reduction due to the pump can be accompanied by either positive or negative refractive index changes depending on the wavelength used. This change in sign of the phase amplitude coupling can be understood by considering the atomlike nature of the quantum dot transitions involved. (C) 2010 American Institute of Physics. [doi:10.1063/1.3476347]
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页数：3
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