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二维光子晶体不可约布里渊区及其能带结构的研究
引用本文:董华锋,吴福根,许振龙,张欣.二维光子晶体不可约布里渊区及其能带结构的研究[J].中国科学:物理学 力学 天文学,2011(6):775-780.
作者姓名:董华锋  吴福根  许振龙  张欣
作者单位:[1]广东工业大学实验教学部,物理与光电工程学院,广州510006 [2]湄洲湾职业技术学院,莆田351254
基金项目:国家自然科学基金(批准号:10674032和11004039); 广东省自然科学基金(批准号:6021480)资助项目
摘    要:在固体物理中,通常认为对于给定的晶格来说,晶体的不可约布里渊区(IBZ)是给定的,是不变化的.实际上,对于由同样的晶格构成的不同的晶体(晶体=晶格+基元)而言,由于基元的对称性以及取向和配置等原因,使得晶体的对称性不同于晶格,此时,晶体的IBZ要发生变化.本文通过一个二维光子晶体的具体事例说明,随着基元取向的改变,IBZ也在随着变化.当晶体的对称性低于其晶格的对称性时,晶体的IBZ扩大为整个第一布里渊区.

关 键 词:光子晶体  不可约布里渊区  能带结构  对称性

Research on the irreducible Brillouin zone and band structure of two-dimensional photonic crystals
DONG HuaFeng,WU FuGen,*,XU ZhenLong,& ZHANG Xin.Research on the irreducible Brillouin zone and band structure of two-dimensional photonic crystals[J].Scientia Sinica Pysica,Mechanica & Astronomica,2011(6):775-780.
Authors:DONG HuaFeng  WU FuGen    XU ZhenLong  & ZHANG Xin
Affiliation:1 Department of Experiment Education, College of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China; 2 Meizhouwan Vocational Technology College, Putian 351254, China
Abstract:It is generally considered that the irreducible Brillouin zone (IBZ) of crystals will not be changed for a given lattice in solid state physics. In fact, for different crystals (crystal = lattice + basis) with the same lattice, the basis’s symmetry, orientation and configuration may make the symmetry of crystal different from lattice. Here, the IBZ of crystal will be changed. This paper, through a specific example of two-dimensional photonic crystals, illuminates that the IBZ of crystal will be changed with the change of bases orientation. The IBZ of crystal expand into the whole first Brillouin zone when the symmetry of crystal is far below its lattice.
Keywords:photonic crystals  irreducible Brillouin zone  band structure  symmetry
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