论文标题
第二次谐波产生和中子散射中的电子多物
Electronic multipoles in second harmonic generation and neutron scattering
论文作者
论文摘要
非线性光学器件，尤其是第二次谐波生成（SHG），越来越多地用于许多现代学科，从物理科学的材料表征到医学的生物成像和信息技术中的光学信号处理。我们提出了理论分析，为能量集成的SHG响应提供了强有力的估计。在计算中，时空中对称性的需求得到了完全尊重的，并且天然和磁性二角形信号的估计值优于以前的二分法。像对称要求一样，在振幅中可以追溯到磁性中子散射，其中包括所有轴向和极性（狄拉克）的贡献。我们的工作方法，就球形多物和对称性的实现而言，可以用于各种其他电子特性探针中。
Nonlinear optics, and particularly second harmonic generation (SHG), is increasingly used in many modern disciplines from material characterization in physical sciences to bio-imaging in medicine and optical signal processing in information technology. We present a theoretical analysis providing a strong estimate for the energy-integrated SHG response. Requirements of symmetry in time and space are fully respected in the calculation, and estimates of natural and magnetic circular dichroic signals are superior to previous ones. Like symmetry requirements are traced in the amplitude for magnetic neutron scattering, which includes all axial and polar (Dirac) contributions. Our method of working, in terms of spherical multipoles and implementation of symmetry, could be of use in a variety of other probes of electronic properties.
