为了研究杂质吸收对一维掺杂声子晶体缺陷模的影响,引入复波数,推导出一维掺杂声子晶体的转移矩阵,计算了一维掺杂声子晶体的透射系数和反射系数随衰减系数的变化特征.得出杂质的衰减系数对一维掺杂声子晶体透射波中和反射波中的缺陷模都有显著的影响.在透射波中,随着衰减系数的增加缺陷模峰高迅速降低,κ在0～0.002k范围内缺陷模比较明显.当衰减系数增加到0.005k时,缺陷模几乎消失.反射波中的缺陷模随着衰减系数的变化也有相同的特征.
To study the influence of impurity absorption on the impurity-doped 1D phononic crystal defect mode,the complex wave number is adopted,the transfer matrix of the impurity-doped 1D phononic crystal is inferred,and variety feature of attenuation coefficient with the transmission coefficient and reflection coefficient in the impurity-doped 1D phononic crystal is calculated.The attenuation coefficient has obvious influence on the defect mode in transmission wave and reflection wave.In transmission wave,the defect mode lowers quickly with the attenuation coefficient increment,the defect mode is more obvious when the attenuation coefficient is 0～0.002k,when the attenuation coefficient increases to 0.005k the defect mode already disappears.In reflection wave,the defect mode has the same characteristic.
参考文献
| [1] | Ei Yablonovitch .Inhibited spobntaneous emission in solidstate physics and electronics[J].Physical Review Letters,1987,58(20):2059. |
| [2] | Sajeev John .Strong localization of photons in certain disordered dielectric superlattices[J].Physical Review Letters,1987,58(23):2486. |
| [3] | Kushwaha M S .Acoustic band-structure of periodic elastic composites[J].Physical Review Letters,1993,71(13):2022. |
| [4] | 曾广武,肖伟,程远胜.多组声子晶体复合结构的隔声性能[J].振动与冲击,2007(01):80-83. |
| [5] | 温激鸿,韩小云,王刚,赵宏刚,刘耀宗.声子晶体研究概述[J].功能材料,2003(04):364-367. |
| [6] | 曹永军,董纯红,周培勤.一维准周期结构声子晶体透射性质的研究[J].物理学报,2006(12):6470-6475. |
| [7] | 温激鸿,王刚,刘耀宗,郁殿龙.基于集中质量法的一维声子晶体弹性波带隙计算[J].物理学报,2004(10):3384-3388. |
| [8] | 刘启能.一维声子晶体的传输特性[J].人工晶体学报,2008(01):179-182. |
| [9] | 刘启能.多通道声子晶体滤波器的理论研究[J].振动与冲击,2008(03):117-119,123. |
| [10] | 王文刚,刘正猷,赵德刚,柯满竹.声波在一维声子晶体中共振隧穿的研究[J].物理学报,2006(09):4744-4747. |
| [11] | 马大猷.现代声学理论基础[M].北京:科学出版社,2004:17. |
| [12] | 刘启能.吸收对光子晶体能带结构的影响[J].激光与红外,2007(06):543-545. |
| [13] | 刘启能.杂质吸收对一维光子晶体缺陷模的影响[J].中国激光,2007(06):777-780. |
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