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The Characteristics of GaSb on GaAs Grown by ALE-MBE

This dissertation contains two parts which is included the Gallium antimony (GaSb) thin film and quantum dots grown by ALE-MBE process. The ALE-MBE technology was used to get better film quality and to control exactly the thickness of epitaxial layers for quantum dots growth. For the larger lattice mismatch, it will be carefully controlled the substrate temperature and V/III flux ratio based on the growth mechanism to obtain the high quality of GaSb films. After fully understanding the GaSb films growth, the characteristics of GaSb quantum dots such as the density and size could be controlled.
The XRD, Raman and Photo-reflectance measurements were used for obtaining the optimum growth conditions of Gasb films shown at temperature; 500~520¢Jand the V/III flux ratio about 2.5~3. The formation of three dimensional GaSb islands on GaAs substrate is expected at the deposition of a critical number of GaSb monolayer, About 3.1 monolayer grown is the optimum growth condition, and samples were characterized by atomic force microscopy (AFM). In order to control the dots size, sharp and dots density, the growth mechanism were discussed by analyzing different growth parameters included the growth temperature, thickness of monolayer, growth interruption time (GRI), and capped layer in detail.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0706104-164138
Date06 July 2004
CreatorsHuang, Jiong-shun
ContributorsWan-quan Guo, Heng-yi Weng, Wei-zhou Xu, Ai-na Hong, Qiu-bing Chen
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageCholon
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0706104-164138
Rightsnot_available, Copyright information available at source archive

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