An experimental setup for room temperature waveguide spectroscopy of self-assembled quantum dots

被引：1
|
作者：
Visimberga, G.
De Giorgi, M.
Passaseo, A.
De Vittorio, M.
机构：
[1] Distretto Tecnol ISUFI, CNR, INFM, Natl Nanotechnol Lab, I-73100 Lecce, Italy
[2] Univ Lecce, Dipartimento Fis, I-73100 Lecce, Italy
来源：
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS | 2006年 / 8卷 / 07期
关键词：
quantum dots; absorption; in-plane transmission; carrier dynamics; thermal escape;
D O I：
10.1088/1464-4258/8/7/S32
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this work we present the realization of an experimental setup to measure the absorption spectrum of low planar density active media in nanoscale devices. The experimental technique employs in-plane light transmission through a waveguide embedding the active medium. It has been applied to the investigation of the room temperature optical properties of low density self-assembled InGaAs/GaAs quantum dots (QDs), emitting around 1.3 mu m. A detailed analysis of the obtained spectra showed the occurrence of a Stokes shift which after inspection turned out to be related to the thermally activated carrier migration throughout the QD ensemble.
引用
收藏
页码：S514 / S517
页数：4
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