Guided modes near the Dirac point in negative-zero-positive index metamaterial waveguide
Guided modes near the Dirac point in negative-zero-positive index metamaterial waveguide
复制标题
负零正折射率超材料波导中狄拉克点附近的导模
DOI：
10.1364/oe.18.012779
复制
发表时间：
2010-06-07
期刊：
影响因子：
3.8
通讯作者：
Chen, Xi
中科院分区：
文献类型：
--
作者：
Shen, Ming;Ruan, Lin-Xu;Chen, Xi
以负零正折射率超材料（NZPIM）光场双锥结构狄拉克点（DP）的实现为动力，利用图形化方法对Dirac点附近NZPIM波导中的导模进行了理论研究。由于线性Dirac色散，当角频率小于DP时，基模不存在，而当角频率大于DP时，NZPIM波导的行为与传统介质波导相似。导模的独特性质类似于电子波在石墨烯波导中的传播[j]。理论物理。列托人。[j] .岩石力学与工程学报，1999,21(5):444 - 444。这些结果表明，石墨烯中的许多奇异现象可以通过相对简单的光学NZPIM来模拟。(C) 2010年美国光学学会
Motivated by the realization of the Dirac point (DP) with a double-cone structure for optical field in the negative-zero-positive index metamaterial (NZPIM), we make theoretical investigations of the guided modes in the NZPIM waveguide near the DP by using the graphical method. Due to the linear Dirac dispersion, the fundamental mode is absent when the angular frequency is smaller than the DP, while the behaviors of NZPIM waveguide are similar to the conventional dielectric waveguide when the angular frequency is larger than the DP. The unique properties of the guided modes are analogous to the propagation of electron waves in graphene waveguide [Appl. Phys. Lett., 94, 212105 (2009)], corresponding to the classical motion and the Klein tunneling. These results suggest that many exotic phenomena in graphene can be simulated by the relatively simple optical NZPIM. (C) 2010 Optical Society of America