Super Low Density InGaAs Semiconductor Ring-Shaped Nanostructures

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• 作者：Jihoon H. Lee ; Zhiming M. Wang ; Morgan E. Ware ; Kushal C. Wijesundara ; Mauricio Garrido ; Eric. A. Stinaff ; Gregory J. Salamo
• 刊名：Crystal Growth & Design
• 出版年：2008
• 出版时间：June 2008
• 年：2008
• 卷：8
• 期：6
• 页码：1945 - 1951
• 全文大小：2190K
• 年卷期：v.8,no.6(June 2008)
• ISSN：1528-7505

文摘

We report on the ability to fabricate super low density InGaAs semiconductor ring-shaped nanocrystals on a GaAs (100) surface by molecular beam epitaxy. Specifically, we demonstrate densities down to 2.3 × 10⁶ cm⁻² with only self-assembled methods based on droplet epitaxy. This is several orders of magnitude lower than conventional nanostructures. The formation of these ring-shaped nanostructures is driven by a self-assembled indium nanodrilling mechanism and diffusion during crystallization.