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

利用TE入射条件下交叉传播倏逝波在平面介质表面的局部圆偏振，对近场光泵浦产生的晶格型自旋极化Cs原子的自旋相关量子光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，这些行为改变了光物质相互作用中决定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在棱镜表面交叉传播的te偏振倏逝波对叠加产生的光学近场中存在圆旋转电场。利用局域圆偏振，我们开发和研究了(1)实现自旋极化原子阵列晶格结构的光学装置，(2)原子晶格弱散射光探测系统，(3)由微通道板和冷却CCD相机组成的激光冷却原子群产生自旋极化原子晶格的探测系统。(5)在光学近场双光子共振电离光谱实验研究的基础上，开发了光学近场自旋敏感激光电离光谱和显微系统，使我们能够观察与自旋极化原子晶格的量子光学动力学相关的单原子水平事件。我们还利用半导体激光器的调频噪声光谱，开发了一种简单方便、灵敏度高的光学近场光谱方法。在这些实验研究的基础上，我们正在着手实现自旋极化原子晶格，以研究与光学近场相互作用的二维量子系统。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式描述的二次量子化形式，建立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表述为激发的隧穿现象，并计算了介电表面附近任意阶的电磁极和多极的自发衰减率。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，这种行为导致了自旋依赖于跃迁概率的调制和选择规则的交替，这是一种称为腔QED的一般量子电动力学效应。这些结果也被扩展到纳米电子和纳米电光器件中发生的基本过程的评估，开辟了纳米技术的新时代。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