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Investigation of Electromagnetic Properties of Multiparticle Systems in the Optical and Microwave Regions .

机译：[物理学报Acta Physica Sinica]于振文，于振文-光学和微波领域多粒子系统的电磁性质研究。

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摘要

The goal of this work is to examine the electromagnetic properties of multiple particles ensembles in optical and microwave regions. Electromagnetic scattering problems of multi-particles systems appear in many research areas, including biomedical research problems. When a particle system becomes dense, multiple scattering between the particles need to be included in order to fully describe the response of the system to an EM wave. The generalized multiparticle Mie (GMM) solution is used to rigorously solve the Maxwell's equations for multi-particles systems. The algorithm accounts for multiple scattering effects by transforming the waves scattered by an individual particle to the incident waves of other spheres in the ensemble.;In the optical region, light scattering from biological tissues can reveal structural changes in the tissues which can be a mean for disease diagnosis. A new Monte Carlo simulation method is introduced to study the effect of tissue structure on signals from two diagnostic probes, the polarization gating probe and low coherence enhanced back scattering probe (LEBS).;In the microwave region, the study of electromagnetic properties with metallic nanoparticles can determine their potential as effective heating agents in microwave hyperthermia therapy. The investigation aims to study the dielectric properties of metallic nanoparticles and quantify the relationship between the characteristics of metallic nanoparticles and the heating effect. The finding should help optimize the design and use of metallic nanoparticles in hyperthermia treatment. In addition, the metallic nanoparticles are studied for their potential to be contrast agents for biological tissue in the microwave region.
机译：这项工作的目的是检查光学和微波区域中多个粒子集合的电磁特性。多粒子系统的电磁散射问题出现在许多研究领域，包括生物医学研究问题。当粒子系统变得密集时，为了充分描述系统对EM波的响应，需要在粒子之间包括多个散射。广义多粒子Mie（GMM）解决方案用于严格求解多粒子系统的麦克斯韦方程组。该算法通过将单个粒子散射的波转换为整体中其他球的入射波来解决多重散射效应。在光学区域中，来自生物组织的光散射可以揭示组织中的结构变化，这可能意味着用于疾病诊断。引入了一种新的蒙特卡洛模拟方法，以研究组织结构对来自两种诊断探针（极化门控探针和低相干增强背散射探针（LEBS））的信号的影响。在微波区域，研究金属的电磁特性纳米粒子可以确定其在微波热疗中作为有效加热剂的潜力。该研究旨在研究金属纳米粒子的介电性能，并量化金属纳米粒子的特性与加热效果之间的关系。这一发现应有助于优化金属纳米颗粒在热疗中的设计和使用。此外，研究了金属纳米颗粒作为微波区域生物组织造影剂的潜力。

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  • 作者

    Yip, Wendy.;

  • 作者单位

    Northwestern University.;

  • 授予单位 Northwestern University.;
  • 学科 Engineering Electronics and Electrical.;Physics Optics.;Physics Electricity and Magnetism.
  • 学位 Ph.D.
  • 年度 2012
  • 页码 91 p.
  • 总页数 91
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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