高精细度光学微腔中原子的偶极俘获

Optical dipole trap in a high-finesse micro-cavity

利用梯度光场产生的光学偶极力对原子的作用是实现原子俘获的重要途径 .分析高精细度光学微腔中的偶极阱 ,讨论了由腔内驻波场、侧向和横向约束光构成光学势阱的特性 ,说明在高精细度光学微腔中可以产生尺度为亚微米 ,阱深为mK量级的纯光学阱 ,并获得单原子与光场的强耦合作用 .还讨论了激光线宽对微腔中偶极阱阱深的影响 .

Optical dipole potential in an inhomogeneous light field is an important method of realizing the laser cooling and trapping of single atoms. The optical dipole trap in the high-finesse micro-cavity is discussed, and different configurations of optical potential composed of standing wave and vertical confined beams are analyzed. It is shown that the sub-micron scale optical trap could be obtained in this micro-cavity with the potential depth of about mK. The strong coupling of atom and the cavity mode can be realized. We also discuss the effect of laser line width on the depth of potential well.