Development of Community Light Scattering Computational Capabilities

这项研究旨在发展理论和计算方法，以改进对非球形粒子在大范围尺寸参数范围内的光学性质的模拟。理论/计算工作的应用跨越了物理、化学和工程的许多广泛领域；在大气和海洋科学、燃烧科学、天体物理、生物光学、制造诊断和控制以及许多其他领域具有特别重要的意义。本研究将培养研究生和博士后学者。经过测试和优化，该课题组计划将计算程序以开源代码的形式发布给研究界。这项研究旨在扩展以前NSF资助的研究，以开发基于不变嵌入T矩阵方法(II-TM)的高级能力，以模拟具有小到中等尺寸参数的非球形、不均匀粒子的光学性质。本研究试图从理论和数值两个角度进一步完善II-TM。该小组最近开发了一个初步版本的物理几何光学模型(PGOM)，该模型基于大尺寸参数的电磁体积或表面积分关系。PGOM和II-TM套件将代表最先进的光散射计算能力，在大气/海洋辐射传输和遥感方面有着广泛的应用。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

This study seeks to develop theoretical and computational methods to improve simulations of optical properties of non-spherical particles over a broad range of size parameters. Applications of the theoretical/computational work span many broad areas of physics, chemistry, and engineering; with specific importance in atmospheric and oceanic sciences, combustion science, astrophysics, bio-optics, manufacturing diagnostics and control, and many other fields. This study will train graduate students and post-doctoral scholars. After testing and optimization, this research group plans to release the computational programs as open-source codes to the research community. This study seeks to expand previous NSF-funded research to develop advanced capabilities based on the invariant imbedding T-matrix method (II-TM) for simulating the optical properties of non-spherical, inhomogeneous particles with small to moderate size parameters. This study seeks to further improve the II-TM from both theoretical and numerical perspectives. This group recently developed a preliminary version of a physical geometric optics model (PGOM) based on either an electromagnetic volume- or a surface-integral relation for large size parameters. The suite of PGOM and II-TM will represent state-of-the-art light scattering computational capabilities, with a wide range of applications in atmospheric/oceanic radiative transfer and remote sensing.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.