Rydberg atoms inside hollow-core photonic crystal fibre

里德伯原子具有极端的性质。特别是大的极化率导致极强的相互作用，这可以用来产生光学非线性。在本项目中，我们将研究空芯纤维内的热原子以及高激发里德堡原子之间的各种相互作用机制。良好准直的强光场、大的原子密度和光学深度、简单的几何形状和金属结构的集成的组合理想地适合于采用光学双稳态用于窄带THz产生和检测。在微波或太赫兹域中，在微波或太赫兹域中出现大的场。我们期望，通过合适的几何形状，我们可以产生超过1 THz的mW功率，这通常是商业CW系统所无法实现的。在下一步中，我们希望使用陡峭的光谱特征作为THz辐射的敏感探针。集合的集体响应将导致非常灵敏的THz功率计。最后，我们将研究范德华相互作用的影响，以及如何利用这一点，在类似的方式，因为它是与超冷气体，非线性光学。

Rydberg atoms have extreme properties. In particular the large polarizabilities lead to extremely strong interactions, which can be exploited to produce optical non-linearities. In this project we will study hot atoms inside hollow core fibres and various interaction mechanisms between highly excited Rydberg atoms. The combination of well collimated intense light fields, large atomic densities and optical depths, simple geometries and the integration of metallic structures is ideally suited to employ optical bistabilities for narrowband THz generation and detection. In the bistable phase emerge large fields in the microwave or THz domain. We expect that with a suitable geometry we can produce mW powers above one THz, which is usually not available with commercial cw-systems. In a next step we want to use the steep spectroscopic feature as a sensitive probe for THz radiation. The collective response of the ensemble will lead to a very sensitive THz Power-meter. Finally we will study the effect of the van-der-Waals interaction and how this can be exploited, in a similar manner as it is done with ultracold gases, for nonlinear optics.