Measurement of the Seperation between Atoms beyond Diffraction Limit

We propose a scheme to obtain the distance of two identical atoms placed inside the standing wave field by monitoring the collective resonance fluorescence spectrum emitted by the two particles. We find three different parameter ranges, depending on the distance of the atoms as compared to the transition wavelength. For large interparticle distances, dipole-dipole coupling is negligible, and the main system evolution arises from the interaction with the standing wave field. In the small-distance limit, the dynamics is dominated by the dipole-dipole interaction. Finally, in the intermediate region, a rich interplay of the various couplings arises, which however is lifted for strong driving laser fields. The present measurement procedure allows us to distinguish the three cases. In each of the cases, we show how to determine the distance of the two particles and their respective positions relative to the nodes of the standing wave field with fractional-wavelength precision.     

双原子、三原子系统的共振荧光峰值与线宽

计算了双原子、三原子系统共振荧光的峰值与线宽随Rabi频率变化的关系，以及受激辐射与自吸收的影响 关键词：     

序列脉冲激光中的原子共振辐射

本文详细研究了序列脉冲激光与二能级原子共振作用的Bloch方程的解。在此基础上,结合数值计算,求出了序列脉冲作用下二能级原子的共振辐射谱;并得出如下结论:对满足K_1/K=1的原子(如仅受自然展宽的气体原子),序列脉冲差不多等效于一单色激光场;而对满足K_1/K(?)=1的原子(比如一些固体原子)序列脉冲场中边频成份也表现出较强的作用,辐射谱呈现出多边峰现象。     

世界最佳单光子源

近期,英国《自然》子刊《自然-纳米技术》发表了中国科学技术大学潘建伟、陆朝阳等人关于量子点脉冲共振荧光确定性高品质单光子源的研究工作,这是我国量子点光学量子调控领域发表在《自然》系列期刊上的首篇论文。     

Phase Dependence of Fluorescence Spectrum of a Two-Level Atom in a Trichromatic Field

We examine the phase-dependent effects in resonance fluorescence of a two-level atom driven by a trichromatic modulated field. It is shown that the fluorescence spectrum depends crucially on the sum of relative phases of the sideband components compared to the central component, not simply on the respective phases. The appearance or disappearance of the central peak and the selective elimination of the sideband peaks are achieved simply by varying the sum phase. Once the sum phase is fixed, the spectrum keeps its features unchanged regardless of the respective relative phases.     

强度依存耦合J-C模型中光场强度对原子共振荧光的影响

本文应用量子电动力学理论,研究了强度依存耦合的二能级原子与单模光场相互作用系统中,光场强度对原子共振荧光的影响.证明了系统的共振荧光仍有三峰带结构,光场强度的增加,将使三峰带结构更加明显,但当光场强度很大,使得本征谱分裂值等于一个激光光子能量时,三峰带结构变为双峰带结构,而且边峰带由单光子跃迁变为双光子跃迁.     

吡啰红Y-共振荧光光谱法测定痕量甲醛

研究了吡口罗红Y的共振荧光光谱特征,基于硫酸介质中甲醛能催化溴酸钾氧化吡口罗红Y的反应,使其共振荧光强度减弱。据此建立了催化共振荧光分析法测定甲醛的新方法。方法的线性范围为0.02—1.20μg/mL,检出限为6.1×10-3μg/mL。样品加标回收率为96.5%—98.5%。新建方法简便快速,可用于环境水样中甲醛的测定。     

腔场耦合的二能级原子荧光谱

过光与物质相互作用的主方程计算了强场激励的二能级原子与单模腔耦合的稳态荧光谱。在腔场的强耦合作用下,三峰Mollow谱的每个成分都分裂为多重的,这种现象由腔场使原子修饰态能级漂移而导致的,荧光谱的具体结构则依赖于驱动场的拉比频率和原子-腔的耦合系数。     

类晶气体的共振荧光

类晶气体是一种新的物质形态,即原子在空间中高度有序,而电子局域在各自的原子中.讨论一维类晶气体的共振荧光,发现在适当的条件下,共振荧光可呈现合作效应,并推导出共振荧光的谱结构,发现改变有关参数可以显著地改变共振荧光谱分布的特性和荧光的空间分布特性,类晶气体共振荧光的这些有趣的新特性是其它形态的物质的共振荧光所没有的. 关键词：     

压缩真空态中三能级原子的定态共振荧光

本文得到了与压缩白噪声真空库耦合的三能级原子在强相干驱动场作用下的定态共振荧光谱。结果表明谱分布强烈地依赖于库场压缩性及相干驱动场与库场压缩分量之间的位相差。 关键词：