SPATIALLY AND SPECTRALLY RESOLVED IMAGING OF GAAS QUANTUM-DOT STRUCTURES USING NEAR-FIELD OPTICAL TECHNIQUE

Authors
TODA Y KOUROGI M OHTSU M NAGAMUNE Y ARAKAWA Y
Citation
Y. Toda et al., SPATIALLY AND SPECTRALLY RESOLVED IMAGING OF GAAS QUANTUM-DOT STRUCTURES USING NEAR-FIELD OPTICAL TECHNIQUE, Applied physics letters, 69(6), 1996, pp. 827-829
Citations number
13
Categorie Soggetti
Physics, Applied
Journal title
Applied physics letters → ACNP
ISSN journal
00036951
Volume
69
Issue
6
Year of publication
1996
Pages
827 - 829
Database
ISI
SICI code
0003-6951(1996)69:6<827:SASRIO>2.0.ZU;2-H
Abstract
We present experimental result on spatially and spectrally resolved im aging of GaAs quantum dot (QD) structures using a near-field optical m icroscope. Three photoluminescence (PL) peaks which originate from QD, quantum well (QW), and bulk regions were observed at liquid-He temper ature. Carriers were observed to diffuse effectively from the AlGaAs b arriers to the QD and QW regions. The region of the intension carrier capture manifests itself by emitting a sharp PL peak, and is estimated to be about 300 nm. (C) 1996 American Institute of Physics.