This study establishes the accuracy and efficacy of the recently developed radiative transfer with reciprocal transactions (R2T2) method for quickly simulating radiation transfer through concentrated thick suspensions of optically hard nanoparticles featuring a large mismatch in refractive and/or absorption indices compared with their surrounding medium. Concentrated suspensions of optically hard nanoparticles exhibit strong light scattering and dependent scattering effects including both near-field interactions among particles and interferences of scattered waves in the far-field. Concentrated suspensions of metallic nanoparticles also exhibit plasmon coupling effect that leads to widening of absorption peak and red-shift in the peak surface plasmon resonance wavelength. However, predicting these complex interactions between EM waves and particles in thick and concentrated suspensions by explicitly solving Maxwell's equations is computationally intensive, if not impossible. Conventional solutions like Lorenz–Mie theory combined with independent scattering approximation do not account for dependent scattering and plasmon coupling. Furthermore, the dense medium radiative transfer theory is a far-field approximation that does not account for near-field effects, leading to significant errors in predictions, as illustrated in this study. By contrast, the R2T2 method's predictions showed excellent agreement with the solutions of Maxwell's equations obtained using the superposition T-matrix method for thin films containing optically hard particles. The method also rigorously accounted for multiple scattering as well as plasmon coupling in thick concentrated suspensions. These results could facilitate the design of plasmonic suspensions used in various energy and environmental applications.
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8 July 2024
Research Article|
July 10 2024
Dependent scattering and plasmon coupling in concentrated suspensions of optically hard nanoparticles
Abhinav Bhanawat
;
Abhinav Bhanawat
(Formal analysis, Investigation, Methodology, Software, Validation, Visualization, Writing – original draft, Writing – review & editing)
1
Mechanical and Aerospace Engineering Department, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles
, Los Angeles, California 90095, USA
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Ricardo Martinez
;
Ricardo Martinez
(Methodology, Software)
1
Mechanical and Aerospace Engineering Department, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles
, Los Angeles, California 90095, USA
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Refet Ali Yalcin
;
Refet Ali Yalcin
(Conceptualization, Methodology, Software, Validation)
1
Mechanical and Aerospace Engineering Department, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles
, Los Angeles, California 90095, USA
2
Saint-Gobain Research Paris
, Aubervilliers 93300, France
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Thomas Lee
;
Thomas Lee
(Methodology, Software)
1
Mechanical and Aerospace Engineering Department, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles
, Los Angeles, California 90095, USA
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Laurent Pilon
Laurent Pilon
a)
(Conceptualization, Funding acquisition, Supervision, Writing – review & editing)
1
Mechanical and Aerospace Engineering Department, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles
, Los Angeles, California 90095, USA
a)Author to whom correspondence should be addressed: [email protected]. Tel.: +1 (310)-206-5598. Fax: +1 (310)-206-2302
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a)Author to whom correspondence should be addressed: [email protected]. Tel.: +1 (310)-206-5598. Fax: +1 (310)-206-2302
Appl. Phys. Lett. 125, 021106 (2024)
Article history
Received:
January 04 2024
Accepted:
June 25 2024
Citation
Abhinav Bhanawat, Ricardo Martinez, Refet Ali Yalcin, Thomas Lee, Laurent Pilon; Dependent scattering and plasmon coupling in concentrated suspensions of optically hard nanoparticles. Appl. Phys. Lett. 8 July 2024; 125 (2): 021106. https://doi.org/10.1063/5.0192977
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