Da Hai-Xia, Huang Zi-Qiang, Li Z Y
Department of Physics and Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006, China.
Opt Lett. 2009 Jun 1;34(11):1693-5. doi: 10.1364/ol.34.001693.
A tunable optical Tamm state is investigated in a magnetophotonic crystal with nematic liquid crystals. It is revealed that the intra-Brillouin-zone bandgaps exist and clearly depend on the applied voltages. We find that the optical Tamm state does occur at the boundary between two photonic crystals, one of which is composed of two dielectric materials and the other that consists of a nematic liquid crystal and a magnetic material. A shift of the optical Tamm state with the applied voltage, which stems from the change in the dielectric permittivity of the nematic liquid crystal, is observed. This novel scheme offers a possibility of controlling the optical Tamm state in magnetophotonic crystals induced by nematic liquid crystals.
研究了一种具有向列型液晶的磁光子晶体中的可调谐光学塔姆态。结果表明，布里渊区内存在带隙，且明显依赖于所施加的电压。我们发现，光学塔姆态确实出现在两种光子晶体的边界处，其中一种由两种介电材料组成，另一种由向列型液晶和磁性材料组成。观察到光学塔姆态随施加电压的移动，这是由向列型液晶介电常数的变化引起的。这种新颖的方案为控制由向列型液晶诱导的磁光子晶体中的光学塔姆态提供了一种可能性。
