%A HUANG Wei-qi, LIU Shi-rong, QIN Chao-jian, CAI Shao-hong, XU Li, WU Ke-yue %T Optical properties of low-dimensional structures formed by irradiation of laser %0 Journal Article %D 2007 %J Front. Phys. %J Frontiers of Physics %@ 2095-0462 %R 10.1007/s11467-007-0017-4 %P 72-75 %V 2 %N 1 %U {https://journal.hep.com.cn/fop/EN/10.1007/s11467-007-0017-4 %8 2007-03-05 %X Some kinds of low-dimensional nanostructures can be formed by the irradiation of laser on a pure silicon sample and SiGe alloy sample. We have studied the photoluminescence (PL) of the hole-net structure of silicon and the porous structure of SiGe where the PL intensity at 706 nm and 725 nm wavelength increases obviously. The effect of intensity-enhancing in the PL peaks cannot be explained within the quantum confinement alone. We propose a mechanism on the increasing PL emission in the above structures, in which the trap state of the interface between SiO2 and nanocrystal plays an important role.