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

自旋极化原子光学近场相互作用相关的量子光学效应研究

基本信息

批准号：
14540374
负责人：
HORI Hirokazu
金额：
$ 2.37万
依托单位：
University of Yamanashi
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14540374/
关键词：
near-field optics spin polarization optical pumping cavity quantum electrodynamics control of radiation laser cooling evanescent wave quantum optics 近接陽光学スピン編極

项目摘要

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

通过使用交叉传播的局域圆偏振，对自旋偏振 Cs 原子与近场光泵浦产生的晶格型自旋偏振阵列结构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选择规则的电磁环境。光与物质相互作用中的宇称守恒定律。在实验研究中，我们首次成功证明了交叉传播对叠加产生的光学近场中循环旋转电场的存在利用局部圆偏振，我们开发并研究了（1）光学装置以实现自旋偏振原子阵列的晶格结构，（2）探测器系统。来自原子晶格的弱散射光，（3）由激光冷却原子群产生自旋偏振原子晶格的装置，由微通道板和冷却 CCD 相机组成的检测系统辅助，（4）离子具有单原子级灵敏度的探测近场光电离原子粒子的引导系统，（5）基于实验研究开发的光学近场自旋敏感激光电离光谱和显微系统光学近场双光子共振电离光谱，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，我们还开发了一种简单方便的光学近场光谱方法，具有高通量。基于这些实验研究的进展，我们正在着手实现对与光学相互作用的二维量子系统的自旋偏振原子晶格研究。在理论研究中，我们发展了一种基于散射电磁波的角谱表示和基于探测器模式描述的第二量子化形式的新型光学近场量子光学理论。场相互作用过程作为激发的隧道现象，并评估了介电表面附近任意阶的电和磁多极子的自发衰减率。基于这些公式，我们研究了自旋极化原子粒子相互作用的量子光学行为。光学近场，导致跃迁概率的自旋相关调制和选择规则的交替，作为一般的量子电动力学效应，称为腔 QED。这些结果也已扩展到纳米电子和纳米电子学中发生的基本过程的评估。纳米电光器件开辟纳米技术新时代。