Site-controlled growth of InP/GaInP quantum dots on GaAs substrates

被引：7
|
作者：
Baumann, V. [1 ]
Stumpf, F.
Steinl, T.
Forchel, A.
Schneider, C.
Hoefling, S.
Kamp, M.
机构：
[1] Univ Wurzburg, Inst Phys, D-97074 Wurzburg, Germany
来源：
NANOTECHNOLOGY | 2012年 / 23卷 / 37期
关键词：
SINGLE PHOTONS; SYSTEM;
D O I：
10.1088/0957-4484/23/37/375301
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A technology platform for the epitaxial growth of site-controlled InP quantum dots (QDs) on GaAs substrates is presented. Nanoholes are patterned in a GaInP layer on a GaAs substrate by electron beam lithography and dry chemical etching, serving as QD nucleation centers. The effects of a thermal treatment on the structured surfaces for deoxidation are investigated in detail. By regrowth on these surfaces, accurate QD positioning is obtained for square array arrangements with lattice periods of 1.25 mu m along with a high suppression of interstitial island formation. The optical properties of these red-emitting QDs (lambda similar to 670 nm) are investigated by means of ensemble-and micro-photoluminescence spectroscopy at cryogenic temperatures.
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页数：8
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