Low-dimensional structures formed by irradiation of laser
Huang Wei-Qi(黄伟其)a)c)†, Liu Shi-Rong(刘世荣)b), Xu Li(许丽)a), Wu Ke-Yue(吴克跃)a), Qin Cao-Jian(秦朝建)b), and Cai Sao-Hong(蔡绍洪)a)
a Key Laboratory of Photoelectron Technology and Application, Guizhou University,Guiyang 550026, China; b Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550003, China; c Department of Physics, Guizhou Educational College, Guiyang 550003, China
Abstract Some kinds of low-dimensional nanostructures can be formed by irradiation of laser on the pure silicon sample and the SiGe alloy sample. This paper has studied the photoluminescence (PL) of the hole-net structure of silicon and the porous structure of SiGe where the PL intensity at 706nm and 725nm wavelength increases obviously. The effect of intensity-enhancing in the PL peaks cannot be explained within the quantum confinement alone. A mechanism for increasing PL emission in the above structures is proposed, in which the trap states of the interface between SiO2 and nanocrystal play an important role.
Received: 20 September 2006
Revised: 02 October 2006
Accepted manuscript online:
PACS:
61.80.Ba
(Ultraviolet, visible, and infrared radiation effects (including laser radiation))
Fund: Project supported by the
National Natural Science Foundation of China (Grant
No~10547006).
Cite this article:
Huang Wei-Qi(黄伟其), Liu Shi-Rong(刘世荣), Xu Li(许丽), Wu Ke-Yue(吴克跃), Qin Cao-Jian(秦朝建), and Cai Sao-Hong(蔡绍洪) Low-dimensional structures formed by irradiation of laser 2007 Chinese Physics 16 725
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