Rung Andreas, Ribbing Carl G
Division of Solid State Physics, Department of Engineering Science, Uppsala University, Uppsala, Sweden.
Phys Rev Lett. 2004 Mar 26;92(12):123901. doi: 10.1103/PhysRevLett.92.123901. Epub 2004 Mar 25.
If an ionic material is used in a photonic crystal, the lattice resonance creates a polaritonic gap in the infrared range. The interaction between a polaritonic gap and the structure gap in a 2D square photonic crystal is studied by transfer matrix photonic band structure calculations. The polaritonic gap appears for a surprisingly low volume density of the ionic material. The TM gaps are larger than the TE gaps, as in the dielectric case. By varying the lattice constant, the structure gaps can be shifted across the polaritonic gap, and the effects of merging the two gaps can be studied.
如果在光子晶体中使用离子材料，晶格共振会在红外范围内产生一个极化激元带隙。通过转移矩阵光子能带结构计算，研究了二维方形光子晶体中极化激元带隙与结构带隙之间的相互作用。对于离子材料极低的体积密度，极化激元带隙就会出现。与电介质情况一样，TM带隙大于TE带隙。通过改变晶格常数，可以使结构带隙跨越极化激元带隙移动，进而研究合并这两个带隙的效果。
