实现单个原子的精确操控以及单光子和原子之间的强耦合是发展未来量子技术的关键。微型光学腔是目前进行光子和原子间耦合的主要元件，但微型光学腔尺寸大不能满足未来光子回路和片上集成的要求。表面等离子体激元(Surface plasmon polaritons, SPPs)能将光场束缚在亚波长尺度内，因此有可能实现亚衍射极限尺度的超冷原子操控，它还具有的近场增强特性和慢的传播速度，因此被视为实现光与冷原子间的强耦合的新途径。据此本项目提出研究SPPs与冷原子间的互作用，建立两者互作用的物理模型。通过棱镜耦合对SPPs与超冷87Rb原子的互作用进行试验研究，重点研究SPPs模与超冷87Rb原子间的耦合效应，揭示其中的物理机制，确定影响耦合效率的主要因素，在此基础上发展出调控SPPs模与冷原子间耦合的方法与技术。研制新型SPPs结构，通过该结构对光场进行剪裁，进而实现剪裁光场对超冷87原子团的操控。

Achieving precise manipulation of single atom and the strong coupling between single photon and atom is the key for the future development of quantum technology. Optical micro cavity is a major component that enable coupling between photons and atoms. However, but the size of optical micro cavity is too large to meet the requirements of on-chip integration of photonic circuits. Surface plasmon polaritons (SPPs) can confine the light field into subwavelength scale. Thus it is possible to achieve the manipulation of ultracold atoms in sub-diffraction-limited scale through SPPs. Moreover, SPPs can cause the near field enhancement and its propagation velocity is far less than the velocity of light in free space, Therefore, many researcher deem that it is a new ways of achieving strong coupling between photons and cold atoms. According to these, we propose here to research the interactions SPPs with cold atoms and build the corresponding physical model. We will study the interaction SPPs with ultracold 87Rb atoms by using the means of prism coupling. Research will focus on the coupling effect between SPPs mode and ultracold 87Rb atoms. The purpose is to reveal the physical mechanisms and determine the main factors affecting the coupling efficiency. On this basis, we will develop the methods and techniques that can control the coupling between the SPPs mode and cold atoms. In addition, we also design and fabricate the new type of micro-nano structures, which can tailor the SPPs, and then realize the manipulation of ultracold 87Rb atom cloud by the tailored light field.