Quantum size effects and enhancement of the oscillator strength of excitons in chains of silicon atoms.
Quantum size effects and enhancement of the oscillator strength of excitons in chains of silicon atoms.
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量子尺寸效应和硅原子链中激子振荡强度的增强。
DOI：
10.1103/physrevb.46.3916
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Y. Masumoto
中科院分区：
文献类型：
--
作者：
Y. Kanemitsu;Katsunori Suzuki;Yoshiaki Nakayoshi;Y. Masumoto
本文研究了含5-110个硅原子的链状硅骨架聚合物中受限激子的光学性质随尺寸的变化。随着Si原子数的减少，最低激子态发生蓝移。在具有20个Si原子或更少的链中，最低激子的每Si原子的振子强度随着Si原子的数目的增加而线性增加。激子的辐射衰减速率与Si原子数的平方成正比。这些结果是Si原子链中激子量子尺寸效应的实验证据
We have studied the size-dependent optical properties of confined excitons in chainlike Si-backbone polymers with 5-110 Si atoms. The blueshift of the lowest exciton state was observed with decreasing number of Si atoms. In chains having 20 Si atoms or less, the oscillator strength per Si atom for the lowest exciton linearly increases with increasing number of Si atoms. The radiative-decay rate of excitons is in proportion to the square of the number of Si atoms. These results are experimental evidence of the quantum size effect of excitons in chains of Si atoms