Morphology-dependent resonances in homogeneous and core-shell nonspherical particles

Vennes, Benjamin; Preston, Thomas C.

doi:10.1103/physreva.104.033512

Cited by 3 publications

(2 citation statements)

References 47 publications

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“…Beyond homogeneous spherical particles, analysis of MDRs remains a challenge. It requires either the development of new expressions for MDRs in nonspherical and nonhomogeneous systems 302 or the calculation of complete spectra. The latter approach is computationally time-consuming and, for a process like CERS, very limited thus far.…”

Section: Discussionmentioning

confidence: 99%

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Optical trapping and light scattering in atmospheric aerosol science

Rafferty

Vennes

Bain

et al. 2023

Phys. Chem. Chem. Phys.

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Section: Discussionmentioning

confidence: 99%

“…More general expressions for the positions of MDRs in particles with arbitrary deformed shape have been developed, 298,299 and recent work has also combined both GLMT and T-matrix calculations. [299][300][301][302]…”

Section: Light Scattering By Spheroidsmentioning

confidence: 99%

Optical trapping and light scattering in atmospheric aerosol science

Rafferty

Vennes

Bain

et al. 2023

Phys. Chem. Chem. Phys.

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Employing quasidegenerate optical modes for chiral sensing

Almousa,

Weiss,

Muljarov

2024

Phys. Rev. B

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Morphology-dependent resonance induced optical forces in a multiple-sphere system

Wang¹,

Han²,

Zhang

2023

Opt. Express

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Optical fields and forces can be greatly enhanced for a microparticle when the whispering gallery modes (WGMs) are excited. In this paper, by solving the scattering problem using the generalized Mie theory, the morphology-dependent resonances (MDRs) and resonant optical forces derived from the coherent coupling of WGMs are investigated in multiple-sphere systems. When the spheres approach each other, the bonding and antibonding modes of MDRs emerge and correspond to the attractive and repulsive forces, respectively. More importantly, the antibonding mode is good at propagating light forward, while the optical fields decay rapidly for the bonding mode. Moreover, the bonding and antibonding modes of MDRs in the PT-symmetric system can persist only when the imaginary part of the refractive index is small enough. Interestingly, it is also shown that for a PT-symmetric structure, only a minor imaginary part of the refractive index is required to generate a significant pulling force at MDRs, making the whole structure move against the light propagation direction. Our work deepens the understanding of the collective resonance behavior of multiple spheres and paves the way for potential applications in particle transportation, non-Hermitian systems, integrated optical devices, etc.

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Morphology-dependent resonances in homogeneous and core-shell nonspherical particles

Cited by 3 publications

References 47 publications

Optical trapping and light scattering in atmospheric aerosol science

Optical trapping and light scattering in atmospheric aerosol science

Employing quasidegenerate optical modes for chiral sensing

Morphology-dependent resonance induced optical forces in a multiple-sphere system

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