Wan Ren-Gang, Zhang Tong-Yi
Xi’an Institute of Optics and Precision Mechanics, ChineseAcademy of Sciences, Xi’an, China.
Opt Express. 2011 Dec 5;19(25):25823-32. doi: 10.1364/OE.19.025823.
We propose a scheme for two-dimensional (2D) atom localization based on the controlled spontaneous emission, in which the atom interacts with two orthogonal standing-wave fields. Due to the spatially dependent atom-field interaction, the position probability distribution of the atom can be directly determined by measuring the resulting spontaneously emission spectrum. The phase sensitive property of the atomic system leads to quenching of the spontaneous emission in some regions of the standing-waves, which significantly reduces the uncertainty in the position measurement of the atom. We find that the frequency measurement of the emitted light localizes the atom in half-wavelength domain. Especially the probability of finding the atom at a particular position can reach 100% when a photon with certain frequency is detected. By increasing the Rabi frequencies of the driving fields, such 2D sub-half-wavelength atom localization can acquire high spatial resolution.
我们提出了一种基于受控自发辐射的二维原子定位方案，其中原子与两个正交驻波场相互作用。由于原子-场相互作用的空间依赖性，原子的位置概率分布可以通过测量产生的自发辐射光谱直接确定。原子系统的相位敏感特性导致驻波某些区域的自发辐射猝灭，这显著降低了原子位置测量的不确定性。我们发现发射光的频率测量将原子定位在半波长范围内。特别是当检测到具有特定频率的光子时，在特定位置找到原子的概率可以达到100%。通过增加驱动场的拉比频率，这种二维亚半波长原子定位可以获得高空间分辨率。
