摘要
本文基于含时密度泛函理论,研究了不同频率光脉冲场作用下一维钠原子链中电子的输运与等离激元共振之间的耦合规律.在等离激元共振点附近约0.8 e V频率范围内的光脉冲场,都可以激发体系的等离激元共振.这些不同频率外场激发的等离激元共振强度大小在一个数量级.外场频率越接近等离激元共振频率,外场激起的等离激元振动的振幅越大.对于线性原子链等离激元的非线性激发现象,本文用经典谐振子模型给出了定性解释.
At different frequencies of light pulse field, the coupling between plasmon resonance and electron transport of onedimensional sodium atomic chain is investigated by using time-dependent density functional theory. Light pulse field,whose frequency is in about 0.8 e V range around the plasmon resonance point, can stimulate plasmon resonance of the system. Plasmon resonance intensity magnitude which is stimulated by these different frequency light pulse fields are in the same order of magnitude. The more closely the external field frequency approaches to plasmon resonance frequency,the larger plasmon resonance amplitude stimulated by the external field fields will be. With regard to the nonlinear excitation phenomenon of linear atomic chain plasmon, using a classical harmonic oscillator model, we gives a qualitative explanation.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2016年第8期321-327,共7页
Acta Physica Sinica
基金
国家自然科学基金(批准号:11464023)
贵州省普通高等学校创新人才团队(黔教合人才团队字[2012]06号)
凯里学院原子与分子物理重点学科资助的课题~~
关键词
等离激元
一维原子链
含时密度泛函理论
plasmon
one-dimensional atomic chains
time-dependent density functional theory
