Origin of green emission from ZnS nanobelts as revealed by scanning near-field optical microscopy

The emission properties of ZnS nanobelts synthesized through thermal evaporation were investigated by means of scanning near-field optical microscopy. The photoluminescence (PL) images of single nanobelts exhibited a bright line along their length. The local light emission spectra measured over the...

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Bibliographic Details
Published in:Applied physics letters 2008-03, Vol.92 (9), p.091908-091908-3
Main Authors: Tsuruoka, T., Liang, C. H., Terabe, K., Hasegawa, T.
Format: Article
Language:English
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Summary:The emission properties of ZnS nanobelts synthesized through thermal evaporation were investigated by means of scanning near-field optical microscopy. The photoluminescence (PL) images of single nanobelts exhibited a bright line along their length. The local light emission spectra measured over the bright lines showed a green emission peak around 535 nm , which was in good agreement with a PL peak obtained for an ensemble of the nanobelts. From careful scanning-electron-microscopy observations of identical nanobelts, we found that the observed green emission is related to line or planar defects of the ZnS nanobelts.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2890715