Research on quantum optical effects related to the optical near-field interactions of spin-polarized atoms

利用平面介质表面TE入射条件下交叉传播的逝去波的局部圆极化，对自旋极化Cs原子与近场光泵浦产生的晶格型自旋极化阵列结构Cs原子的自旋相关量子光学近场相互作用进行了实验和理论研究。本研究的目的是研究材料表面附近自旋极化原子的量子力学和量子光学行为，这些行为改变了决定光-物质相互作用中选择规则和宇称守恒定律的电磁环境。在实验研究中，我们首次成功地证明了由棱镜表面上一对交叉传播的TE极化逝去波叠加而产生的光学近场中存在圆形旋转电场。利用局域圆偏振，我们发展和研究了(1)光学…更多的L装置，以实现自旋极化原子阵列的晶格结构，(2)来自原子晶格的弱散射光的探测系统，(3)由激光冷却的原子群体产生自旋极化原子晶格的装置，(4)用于探测具有单原子能级灵敏度的近场光学电离原子粒子的离子引导系统，(5)在光学近场双光子共振电离光谱实验研究的基础上发展起来的光学近场自旋灵敏激光电离光谱和显微系统，使我们能够观察到与自旋极化原子晶格的量子光学动力学有关的单原子能级事件。我们还利用半导体激光器的调频噪声光谱，发展了一种简单、方便、高灵敏度的光学近场光谱方法。基于这些实验研究的进展，我们正在着手实现自旋极化原子晶格，以研究二维量子系统与光学近场的相互作用。在理论研究中，我们基于散射电磁波的角谱表示和基于探测器模描述的二次量子化理论，发展了一种新的光学近场量子光学理论。我们将光学近场相互作用过程描述为激发的隧道现象，并计算了介质表面附近任意阶电和磁多极的自发衰减率。基于这些公式，我们研究了自旋极化原子粒子与光学近场相互作用的量子光学行为，这导致了跃迁几率的自旋相关调制和选择规则的变化，这是一种被称为腔QED的一般量子电动力学效应。这些结果还被扩展到对纳米电子和纳米电光器件中发生的基本过程的评估，以开辟纳米技术的新纪元。较少

Experimental and theoretical study have been performed on the spin-dependent quantum-optical near-field interactions of spin-polarized Cs atoms with lattice-type spin-polarized array structure produced by near-field optical pumping by using local circular polarization of cross-propagated evanescent waves of TE incident condition on a planar dielectric surface. The aim of this research is the investigation of quantum mechanical and quantum optical behaviors of spin polarized atoms near material surface which alter the electromagnetic environment determining the selection rules and parity conservation laws in light-matter interaction.In the experimental study, we have, for the first time, succeeded to demonstrate the existence of the circularly rotating electric field in the optical near-fields produced by a superposition of a cross-propagating pair of TE-polarized evanescent waves on a prism surface. Using the local circular polarization, we have developed and investigated on (1) optica … More l setup to realize the lattice structure of spin polarized atomic array, (2) detector system of weak scattered light from the atomic lattice, (3) apparatus for the production of spin-polarized atomic lattice from a laser-cooled atomic crowd facilitated with a detection system composed of micro-channel plate and cooled CCD camera, (4) an ion guiding system to detect near-field optically ionized atomic particles with a single atom level sensitivity, (5) optical near-field spin sensitive laser ionization spectroscopy and microscopy system developed based on the experimental study of optical near-field two-photon resonance ionization spectroscopy which enables us to observe single atom level events related to the quantum optical dynamics of the spin-polarized atomic lattice. We have also developed a simple and convenient method of optical near-field spectroscopy with high sensitivity utilizing the frequency-modulation noise spectroscopy with semiconductor lasers. Based on these developments in experimental studies, we are proceeding to realize the spin polarized atomic lattice to investigate two-dimensional quantum system interacting with optical near-fields.In the theoretical study, we have developed a novel quantum optical theory of optical near-fields based on angular-spectrum representation of scattered electromagnetic waves and second quantization formalism based on detector-mode description. We have formulated the optical near-field interaction processes as a tunneling phenomenon of excitation and evaluated the spontaneous decay rates of electric and magnetic multipoles of arbitrary order near a dielectric surface. Based on these formulations, we have investigated the quantum optical behavior of spin-polarized atomic particles interacting with optical near-fields, which result in the spin dependent modulation of transition probability and alternation of selection rules as a general quantum electrodynamic effect known as cavity QED. These results have been also extended to the evaluation of fundamental processes taking place in nano-electronic and nano-eleclrooptical devices to open up new era of nanotechnology. Less