Enhanced Bragg Reflection in Non-Bravais Superlattice Formed by a Dislocated Teeth-Shaped Plasmonic Waveguide
Enhanced Bragg Reflection in Non-Bravais Superlattice Formed by a Dislocated Teeth-Shaped Plasmonic Waveguide
复制标题
错位齿形等离子体波导形成的非布拉维超晶格中的增强布拉格反射
DOI：
10.1007/s11468-015-9949-7
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发表时间：
2015-05
期刊：
影响因子：
3
通讯作者：
Jin Chongjun
中科院分区：
文献类型：
--
作者：
Liu Wanguo;Shen Yang;Jin Chongjun
从理论上研究了带位错的周期性齿形表面等离子体波导。我们提出了一个等效的可解模型，一个无限长的四节非bravais晶格来描述位错结构。基于Bloch定理，导出了非bravais晶格的带隙和Bragg条件，并讨论了位错对Bragg反射的影响。分析表明，位错对带隙的分布和带隙宽度有显著的影响，在不同的填充因子下，位错能引起奇阶或偶阶Bragg反射的增强。此外，布拉格波长可以通过位错进行线性调节。最后用传递矩阵法和数值模拟方法研究了有限周期等离子体波导的透射谱。计算结果分别给出了不同几何参数对一阶和二阶布拉格反射增强的两种情况。仿真结果证实了Bragg反射随位错的增加而增强，与理论分析吻合较好。
A periodically teeth-shaped surface plasmonic waveguide with dislocation is theoretically investigated. We propose an equivalent solvable model, a four-section non-Bravais lattice with infinite length to describe the dislocated structure. Based on the Bloch theorem, the band gap and Bragg condition of non-Bravais lattice are both derived, and the effect of dislocation on Bragg reflection is discussed. The analysis indicates that the dislocation has a remarkable effect on the distribution of band gaps and gap width and can cause an enhancement of odd-order or even-order Bragg reflection at different filling factors. In addition, the Bragg wavelength can be linearly adjusted by the dislocation. The transmission spectra of a finite-period plasmonic waveguide are studied via both transfer matrix method and numerical simulation at last. The calculation results present two cases for the enhancement of the first-order and the second-order Bragg reflections with different geometric parameters, respectively. The simulation results verify the enhanced Bragg reflection with the increase of dislocation and are well matched with our theoretical analysis.
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影响因子：
1.9
作者：
Guoxi Wang;Hua Lu;Xueming Liu;Y. Gong;Leiran Wang
通讯作者：
Guoxi Wang;Hua Lu;Xueming Liu;Y. Gong;Leiran Wang
影响因子：
35
作者：
Oulton, R. F.;Sorger, V. J.;Zhang, X.
通讯作者：
Zhang, X.
影响因子：
1.9
作者：
Hua Lu;Xueming Liu;Y. Gong;D. Mao;Leiran Wang
通讯作者：
Hua Lu;Xueming Liu;Y. Gong;D. Mao;Leiran Wang
影响因子：
4.7
作者：
Jianwei Mu;Wei-Ping Huang
通讯作者：
Jianwei Mu;Wei-Ping Huang
影响因子：
3.8
作者：
Hosseini, Amir;Nejati, Hamid;Massoud, Yehia
通讯作者：
Massoud, Yehia