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Author (up) Ramirez-Cuevas, F.V.; Gurunatha, K.L.; Parkin, I.P.; Papakonstantinou, I. doi  openurl
  Title Universal Theory of Light Scattering of Randomly Oriented Particles: A Fluctuational-Electrodynamics Approach for Light Transport Modeling in Disordered Nanostructures Type
  Year 2022 Publication ACS Photonics Abbreviated Journal ACS Photonics  
  Volume 9 Issue 2 Pages 672-681  
  Keywords fluctuational electrodynamics; random media; multiple scattering; Monte Carlo; computational nanophotonics  
  Abstract Disordered nanostructures are commonly encountered in many nanophotonic systems, from colloid dispersions for sensing to heterostructured photocatalysts. Randomness, however, imposes severe challenges for nanophotonics modeling, often constrained by the irregular geometry of the scatterers involved or the stochastic nature of the problem itself. In this Article, we resolve this conundrum by presenting a universal theory of averaged light scattering of randomly oriented objects. Specifically, we derive expansion-basis-independent formulas of the orientationand-polarization-averaged absorption cross section, scattering cross section, and asymmetry parameter, for single or a collection of objects of arbitrary shape. These three parameters can be directly integrated into traditional unpolarized radiative energy transfer modeling, enabling a practical tool to predict multiple scattering and light transport in disordered nanostructured materials. Notably, the formulas of average light scattering can be derived under the principles of fluctuational electrodynamics, allowing the analogous mathematical treatment to the methods used in thermal radiation, nonequilibrium electromagnetic forces, and other associated phenomena. The proposed modeling framework is validated against optical measurements of polymer composite films with metaloxide microcrystals. Our work may contribute to a better understanding of light-matter interactions in disordered systems, such as plasmonics for sensing and photothermal therapy, photocatalysts for water splitting and CO2 dissociation, photonic glasses for artificial structural colors, and diffuse reflectors for radiative cooling, to name just a few.  
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  Series Volume Series Issue Edition  
  ISSN 2330-4022 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000763132700042 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1546  
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