Real-time control of the molecular beam epitaxy of nitrides

被引：8

作者：

Massies, J ^{[1
]}

Grandjean, N ^{[1
]}

机构：

[1] CNRS, Ctr Rech Heteroepitaxie & Applicat, F-06560 Valbonne, France

来源：

JOURNAL OF CRYSTAL GROWTH | 1999年 / 201卷

关键词：

III-V nitrides; RHEED; laser reflectivity; quantum wells;

D O I：

10.1016/S0022-0248(98)01360-8

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Due to the peculiarities of the growth process of GaN and related alloys on sapphire substrates, reflection high-energy electron diffraction (RHEED) is not sufficient to correctly monitor all the different steps of molecular beam epitaxy growth (MBE). It is shown that laser reflectivity, which is a very simple method, is highly complementary to RHEED. However, RHEED remains an unrivaled tool for the precise control of the growth. In particular, the observation of RHEED intensity oscillations can be used, as for classical semiconductors, to determine the growth rate with monolayer precision and also the composition of ternary alloys such as AlxGa1-xN. The accuracy of such a RHEED based control of MBE growth of nitrides is exemplified by the optical properties of GaN/AlxGa1-xN quantum well structures. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：382 / 387

页数：6

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