利用正方形和三角形结构声子晶体具有范围较大完全带隙的特性,设计了新型正方形晶格和三角形晶格构成的声子晶体异质结.采用平面波展开和超原胞相结合的方法研究了该异质结的能带结构特性.给出异质结的结构和相应的能带图,分析了异质结界面传导模,研究两侧结构作横向拉开和侧向滑移时对传导模的影响,讨论这些结构的实际可行性.计算结果表明,没有任何晶格移动,该结构异质结在完全带隙中就有传导模存在,界面两侧发生相对移动时,带隙内传导模的数量及位置都发生变化.
参考文献
| [1] | Yablonovitch E;Gmitter T J;Leung K M .Photonic Band Structure:The Face-centered-cubic Case Employing Nonspherical Atoms[J].Physical Review Letters,1991,67:2295-2298. |
| [2] | Busch K.;John S. .Liquid-crystal photonic-band-gap materials: The tunable electromagnetic vacuum[J].Physical review letters,1999(5):967-970. |
| [3] | Sun JZ.;Stirner T. .A photonic crystal with dielectric insertion in macroporous silicon[J].Physica, B. Condensed Matter,2002(3/4):323-327. |
| [4] | Rubio C.;Caballero D. .The existence of full gaps and deaf bands in two-dimensional sonic crystals[J].Journal of Lightwave Technology: A Joint IEEE/OSA Publication,1999(11):2202-2207. |
| [5] | Liu Z Y;Zhang X X et al.Locally Resonant Sonic Materials[J].Science,2000,289:1734-1736. |
| [6] | Wu FG.;Liu ZY.;Liu YY. .Acoustic band gaps in 2D liquid phononic crystals of rectangular structure[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,2002(2):162-165. |
| [7] | Caballero D;Sanchez-Dehesa J .Suzuki Phase in Two-dimensional Sonic Crystals of Liquid Cylinders[J].Physical Review B,2001,64:064303. |
| [8] | 温激鸿,刘耀宗,王刚,赵宏刚.声子晶体弹性波带隙理论计算及实验研究[J].功能材料,2004(05):657-659. |
| [9] | Toyokatsu Miyashita .Full Band Gaps of Sonic Crystals Made of Acrylic Cylinders in Air-numerical and Experimental Investigations[J].Japanese Journal of Applied Physics,2002,41:3170-3175. |
| [10] | Torres M.;Garcia-Pablos D.;Garcia N.;de Espinosa FRM. .Sonic band gaps in finite elastic media: Surface states and localization phenomena in linear and point defects[J].Physical review letters,1999(15):3054-3057. |
| [11] | 胡家光,张晋,敬守勇.二维嵌套复式结构声子晶体的带隙研究[J].人工晶体学报,2009(05):1160-1164. |
| [12] | Wu F G;Hou Z L;Liu Z Y et al.Point Defect States in Two-dimensional Phononic Crystala[J].Physics Letters A,2001,292:198-202. |
| [13] | Sigalas MM. .Defect states of acoustic waves in a two-dimensional lattice of solid cylinders[J].Journal of Applied Physics,1998(6):3026-3030. |
| [14] | Zhang X.;Liu ZY.;Liu YY.;Wu FG. .Defect states in 2D acoustic band-gap materials with bend-shaped linear defects[J].Solid State Communications,2004(1/2):67-71. |
| [15] | Two-dimensional phononic crystal with tunable narrow pass band: Application to a waveguide with selective frequency[J].Journal of Applied Physics,2003(3):1308-1311. |
| [16] | Khelif A.;Choujaa A.;Djafari-Rouhani B.;Wilm M.;Ballandras S.;Laude V. .Trapping and guiding of acoustic waves by defect modes in a full-band-gap ultrasonic crystal - art. no. 214301[J].Physical review, B. Condensed matter and materials physics,2003(21):4301-0. |
| [17] | A. Khelif;A. Choujaa;S. Benchabane;B. Djafari-Rouhani;V. Laude .Guiding and bending of acoustic waves in highly confined phononic crystal waveguides[J].Applied physics letters,2004(22):4400-4402. |
| [18] | 李建宝,汪越胜,张传增.二维声子晶体微腔能带结构的有限元分析与设计[J].人工晶体学报,2010(03):649-655,664. |
| [19] | Li XC;Liu ZY .Coupling of cavity modes and guiding modes in two-dimensional phononic crystals[J].Solid State Communications,2005(6):397-402. |
| [20] | Vasseur J O;Beauqeois M et al.Transmission of Acoustic Waves Through Waveguide Structures in Two-dimensinal Phononic Crystals[J].Phys Status Solidi C:Conferences,2004,1(11):2720-2724. |
| [21] | Y. Pennec;B. Djafari-Rouhani;J.O. Vasseur;P.A. Deymier;A. Khelif .Transmission and dispersion modes in phononic crystals with hollow cylinders: application to waveguide structure[J].Physica Status Solidi. C, Conferences and critical reviews,2004(11):c2711-c2715. |
| [22] | 赵芳,苑立波.二维声子晶体同质位错结缺陷态特性[J].物理学报,2006(02):517-520. |
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