Influence of annealing on stimulated emission in ZnO nanorods

被引：105

作者：

Kwok, W. M.

Djurisic, Aleksandra B.

Leung, Yu Hang

Li, D.

Tam, K. H.

Phillips, D. L.

Chan, W. K.

机构：

[1] Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China

[2] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 18期

关键词：

D O I：

10.1063/1.2378560

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Vertically aligned ZnO nanorod arrays with rod lengths in the range of 200-1500 nm were fabricated by a hydrothermal method. No stimulated emission was observed in as grown nanorods. Annealing of the rods in forming gas and oxygen significantly affected their optical properties and enabled the achievement of stimulated emission. The lowest lasing threshold and defect emission as well as the longest spontaneous emission decay times were obtained for nanorods annealed in oxygen flow. This indicates that interstitial oxygen, which is commonly assumed to be the cause of yellow-green defect emission, is not the dominant defect in hydrothermally grown nanorods. (c) 2006 American Institute of Physics.

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页数：3

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