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Near-field optical mapping of exciton wave functions in a GaAs quantum dot.
MedLine Citation:
PMID:  14611375     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Near-field photoluminescence imaging spectroscopy of naturally occurring GaAs quantum dots (QDs) is presented. We successfully mapped out center-of -mass wave functions of an exciton confined in a GaAs QD in real space due to the enhancement of spatial resolution up to 30 nm. As a consequence, we discovered that the spatial profile of the exciton emission, which reflects the shape of a monolayer-high island, differs from that of biexciton emission, due to different distributions of the polarization field for the exciton and biexciton recombinations. This novel technique can be extensively applied to wave function engineering in the design and the fabrication of quantum devices.
Authors:
K Matsuda; T Saiki; S Nomura; M Mihara; Y Aoyagi; S Nair; T Takagahara
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Publication Detail:
Type:  Journal Article     Date:  2003-10-20
Journal Detail:
Title:  Physical review letters     Volume:  91     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2003 Oct 
Date Detail:
Created Date:  2003-11-12     Completed Date:  2003-12-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  177401     Citation Subset:  -    
Affiliation:
Kanagawa Academy of Science and Technology, 3-2-1 Sakado, Takatsu, Kawasaki, Japan. matsuda@net.ksp.or.jp
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