基于驻波耦合电磁感应光透明(EIT)效应的静态光现象的形成机制被认为是光子晶体或四波混频. 其合理性在于这两种效应都可以实现反射; 但它们却是两种完全不同的物理现象. 在本项目将从介质的粒子数密度的角度, 探讨这两种现象对于光子反射的贡献. 我们将在Rb87原子中的三能级Lambda模型中分析粒子数密度由低到高的变化过程中, 光子晶体从无到有, 不断增强的过程; 包括反射谱在这一过程中的渐变情况, 以及光子晶体起作用时的粒子数临界大小. 本内容的研究对于理解静态光(以及其它基于驻波耦合EIT效应的物理现象)的形成机制有重要意义. 本项目的另一个研究内容是基于驻波耦合EIT的Goos-Hanchen(GH)效应. 分析在可调谐的光子禁带中的GH效应的可调谐性;明确GH位移对(驻波)耦合场的强度和频率的依赖关系.这种固定结构的可调节GH效应在集成光学领域很有应用价值.

The mechanism of the stationary light based on the standing wave coupled electromagnetically induced transparency (EIT) is normally treated as the photonic band-gap (PBG) or the four-wave mixing (FWM). It is reasonable because both of the phenomena can result in the effective reflection. However, those two are very different. For example, if the atomic density is a litter lower, the PBG will not be created. In this project, we will discuss the contribution of PBG and the FWM for an angle of the atomic density. Considering that the atomic density is rising from a quite low point, the reflection based on PBG will get stronger as well. We will try to systemically describe such growing process of the reflectivity and define a critical point for the atomic density when the contribution of the PBG should be taken into account. The research is quite important for understanding the stationary light as well as the other phenomena that based on the standing wave coupled EIT. Another content that included in the project is the Goos-Hanchen (GH) effect based the standing wave coupled EIT. Since the PBG is tunable in such medium, the GH effect is tunable as well. The relation between the GH shift and the strength as well as the frequency of the standing wave will be analyzed. Such tunable effect with a fixed configuration is very promising for the integrated optics.