Optical radiation force on a perfect electromagnetic conductor (PEMC) sphere

Mitri, F.G.; Li, R.X.; Sun, Han

doi:10.1016/j.jqsrt.2020.107280

Cited by 23 publications

(7 citation statements)

References 51 publications

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“…The present theory and analytical formalism may find some applications in elastography and elasticity imaging applications, activation/triggering of implantable devices [44][45][46][47][48] using shear-waves, and possibly other areas in soft matter and condensed matter physics. It must be also noted that mode preservation, coupling, and conversion can be found in electromagnetic theory, especially in materials exhibiting rotary polarization (known also as circular dichroism) as shown in related works in electromagnetic/optical scattering, radiation force, and torque [49][50][51][52].…”

Section: Discussionmentioning

confidence: 94%

Mean Radiation Force of Shear Plane Waves on a Sphere in an Elastic Medium

Mitri

2023

IEEE Open J. Ultrason., Ferroelect., Freq. Contr.

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The mean (time-averaged) longitudinal force component (i.e. acting along the direction of wave propagation) arising from the interaction of linearly-polarized plane progressive shear elastic waves, incident upon a sphere embedded in an elastic medium, is considered. Exact partial-wave series expansions are derived based on the integration of the radial component of the time-averaged elastodynamic Poynting vector in spherical coordinates. The method is verified also stemming from the law of energy conservation applied to elastic scattering. The analytical modeling is useful and provides improved physical understanding of shear-to-compressional (S → P) mode conversion, as well as shear-to-shear (S → S) and transverse-to-transverse (T → T) mode preservation in the context of the mean elastic force. The elastic wave scattering formulation based on Debye's shear and transverse potentials is solved first, and used subsequently to derive the mathematical expression of the mean force efficiency. Numerical computations illustrate the analysis with particular emphasis on the components related to mode preservation, coupling and conversion separately. It is shown here that the total force originates from individual interactions of scattering terms between the scattered pure shear (S → S) and transverse (T → T) waves, in addition to shear-to-transverse (S ⇄ T) coupling, and a shear-to-compression (S → P) mode conversion that contributes negligibly to the total mean force. The benchmark solution presented in this analysis for the time-averaged elastic force of shear plane progressive waves can be utilized to validate numerical methods (such as the FEM, BEM, FDTD or other). The results can provide a priori information for the optimization and design of experimental setups in various applications in biomedical ultrasound, elastography and elasticity imaging, shearwave activation of implantable devices, characterization of biological tissue, seismology and other related applications in shear-wave elastic wave scattering and radiation force. INDEX TERMS -Mean acousto-elastic force, linearly-polarized shear elastic plane waves, elastic scattering, elastic sphere, linear elasticity, elastodynamic Poynting vector (power flow density).

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Section: Discussionmentioning

confidence: 94%

Mean Radiation Force of Shear Plane Waves on a Sphere in an Elastic Medium

Mitri

2023

IEEE Open J. Ultrason., Ferroelect., Freq. Contr.

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“…We will now examine the temperature corrections to the critical angle introduced in (23). We thus consider the case L λ T R eff for δ > 0, where the temperature corrections for τ 1 can be calculated by applying the Mellin transform of the exponential in (20).…”

Section: A Temperature Corrections To Pfamentioning

confidence: 99%

“…PEMC spheres have been studied before and are currently a topic of ongoing research. Previous work by Ruppin [22] and more recent work [23,24] already examined the behavior of a PEMC sphere in a light field where the latter also computed the radiation force exerted on the sphere.…”

Section: Introductionmentioning

confidence: 99%

Switching the sign of the Casimir force between two perfect electromagnetic conductor spheres

Schoger,

Ingold

2024

Phys. Rev. A

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For nonreciprocal objects in vacuum, the Casimir interaction can become repulsive. Here, we present a comprehensive study for idealized nonreciprocal materials known as perfect electromagnetic conductors (PEMC). The system consists of two spheres made of different PEMC materials, including the plane-sphere geometry as a particular case. The sign of the Casimir force does not only depend on the distance between the spheres and their geometric parameters but can be controlled by adjusting the temperature. A repulsive Casimir interaction at small distances allows for stable equilibrium configurations of the spheres. A sum rule previously derived for the plane-plane geometry at zero temperature is violated in general, if at least one plane is replaced by a sphere.

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“…When an axisymmetric wave field illuminates a stationary dielectric sphere suspended in an ambient medium (e.g., air), due to the geometrical symmetry of the particles and the beam of the incident wave, the transverse component of the radiation force disappears and only the longitudinal component exists, and the electromagnetic field is symmetrically distributed [1] . Some work has already been devoted to analyzing this phenomenon, such as the interaction of plane waves with stationary cylindrical [2,3] and spherical particles [4] . However, there are some effects that may break the symmetry of the above electromagnetic field on some occasions, commonly known as the Sagnac effect [5] and the Magnus effect.…”

Section: Introductionmentioning

confidence: 99%

Photonic hooks generated by a rotating dielectric sphere

Zhang,

Tang,

Shi

et al. 2023

AOPC 2023: Nanophotonics

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Optical radiation force on a perfect electromagnetic conductor (PEMC) sphere

Cited by 23 publications

References 51 publications

Mean Radiation Force of Shear Plane Waves on a Sphere in an Elastic Medium

Mean Radiation Force of Shear Plane Waves on a Sphere in an Elastic Medium

Switching the sign of the Casimir force between two perfect electromagnetic conductor spheres

Photonic hooks generated by a rotating dielectric sphere

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