一维共聚物链的色散关系研究

研究了一维共聚物链的晶格振动，得到了不同均聚物构型的色散关系，并分析了其振动模的结构特点.调整界面耦合，得到了界面模，其频率位于声频与光频或光频之间的带隙中.从晶格振动的角度分析了共聚物的量子阱或超晶格特征. 关键词： 共聚物 界面耦合 晶格振动

Theoretical study on dispersion relation of one-dimensional copolymers

Lattice vibration of one-dimensional copolymer chains was studied and the dispersion relation was obtained numerically. The character of the vibration modes was recognized. It was found that the interface modes may appear if the homopolymer blocks have a strong interaction with each other, whose frequencies lie in the band gap between the acoustic and optical branches or between two optical branches. The character of the organic quantum well or superlattice of a copolymer chain was discussed from the view point of vibration modes.