Length dependence of linear and nonlinear optical properties of finite-length BN（5,0） nanotube  

作　　者：蓝尤钊 吴东升 黄淑萍 沈娟 李飞飞 程文旦 

机构地区：[1]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter,The Graduate School of The Chinese Academy of Sciences, Fuzhou 350002, China

出　　处：《Chinese Physics B》2006年第7期1563-1569,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant Nos 20373073 and 90201015）, the Science Foundation of Fujian Province, China （Grant Nos E0210028 and 2002F010）, and the Foundation of State Key Laboratory of Structural Chemistry, China （Grant No 030060）.

摘　　要：In this paper, we investigate the length dependence of linear and nonlinear optical properties of finite-length BN nanotubes. The recently predicted smallest BN（5,0） nanotube with configuration stabilization is selected as an example. The energy gap and optical gap show the obvious length dependence with the increase of nanotube length. When the length reaches about 24 /~, the energy gap will saturate at about 3.2 eV, which agrees well with the corrected quasi- particle energy gap. The third-order polarizabilities increase with the increase of tube length. Two-photon allowed excited states have significant contributions to the third-order polarizabilities of BN（5,0） nanotube.

关 键 词：boron nitride nanotube length-dependence optical properties 

分 类 号：O482.3[理学—固体物理]