Electronic multipoles in second harmonic generation and neutron scattering

G. van der Laan, S. Lovesey
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引用次数: 1

Abstract

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.
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二次谐波产生中的电子多极子和中子散射
非线性光学,特别是二次谐波产生(SHG),越来越多地应用于许多现代学科,从物理科学中的材料表征到医学中的生物成像和信息技术中的光信号处理。我们提出了一个理论分析,为能量集成的SHG响应提供了一个强有力的估计。在计算中充分考虑了时间和空间对称性的要求,对自然和磁性圆二向色信号的估计优于以往的估计。磁中子散射的振幅也有类似的对称性要求,包括所有轴向和极性(狄拉克)贡献。我们的工作方法,在球形多极和对称的实现方面,可以用于各种其他电子性质的探针。
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