Chen Zefeng, Han Peng, Leung Chi Wah, Wang Yu, Hu Mingzhe, Chen Yihang
Laboratory of Quantum Information Technology, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China.
Opt Express. 2012 Sep 10;20(19):21618-26. doi: 10.1364/OE.20.021618.
We demonstrate the physical mechanism of optical Tamm states using the phase properties of the photonic crystals. Based on such mechanism, we propose an efficient way that can precisely produce optical Tamm states at specific frequencies. Moreover, we show that dielectric photonic crystals and single-negative materials can be effectively connected through their reflection phase. Two kinds of one-dimensional dielectric photonic crystals with different single-negative characteristics are designed and repeated alternately to construct a superlattice structure. The band structures and the transmission spectra of this superlattice show that multiple optical Tamm states arise and these Tamm states are coupled with each other to form transmission bands. A special zero-effective-phase gap can also be observed in such superlattice.
我们利用光子晶体的相位特性展示了光学塔姆态的物理机制。基于此机制，我们提出了一种能在特定频率精确产生光学塔姆态的有效方法。此外，我们表明介电光子晶体和单负材料可通过它们的反射相位有效连接。设计了两种具有不同单负特性的一维介电光子晶体并交替重复以构建超晶格结构。该超晶格的能带结构和透射光谱表明出现了多个光学塔姆态，并且这些塔姆态相互耦合形成透射带。在这种超晶格中还能观察到一个特殊的零有效相位带隙。
