InAs self-organized quantum dashes grown on GaAs (211)B

S. P. Guo, Hideo Ohno, A. Shen, Fumihiro Matsukura, Y. Ohno

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

We have grown InAs self-organized quantum dots and quantum dashes on GaAs (211)B substrates by molecular beam epitaxy. The growth temperature dependence of InAs nanostructures were studied by in situ reflection high-energy electron diffraction (RHEED) and ex situ atomic force microscopy. In the studied temperature range from 400 to 510 °C, the RHEED pattern changed from streaky to spotty after deposition of 6 ML of InAs, showing the formation of nanostructures. The quantum dots grown at lower growth temperatures (from 400 to 490 °C) showed bimodal dot size distribution. At higher growth temperatures, a drastic change from quantum dots to quantum dashes was observed. The quantum dashes have an asymmetric hutlike shape and align themselves along the [011] direction. The quantum dash width increases dramatically, whereas the average length and density increases slightly on further deposition of InAs.

Original languageEnglish
Pages (from-to)2738-2740
Number of pages3
JournalApplied Physics Letters
Volume70
Issue number20
DOIs
Publication statusPublished - 1997 May 19

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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