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Size filtering effect in vertical stacks of In(Ga)As/GaAs self-assembled quantum rings

✍ Scribed by W. Ouerghui; A. Melliti; M.A. Maaref; J. Martinez-Pastor; J. Gomis; D. Granados; J.M. Garcia

Publisher: Elsevier Science
Year: 2006
Tongue: English
Weight: 117 KB
Volume: 26
Category: Article
ISSN: 0928-4931
DOI: 10.1016/j.msec.2005.10.046

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✦ Synopsis

We present a systematic study of closely In(Ga)As/InAs quantum rings (QRs) grown by molecular beam epitaxy (MBE). Photoluminescence (PL) experiments show a strong filtering effect in the ring being stacked and simultaneous linewidth narrowing for the appropriate layer thickness (thinner thickness). If the spacer thickness is further reduced, a strong coupling between the nanostructures is produced and the signal shifts to low energy.

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