Abstract
In this work, we consider potential energy of recently conceptualized optimal (balanced) bianisotropic particles in electromagnetic fields. The case of non-resonant lossless particles is studied. Knowing the potential energy of optimal bianisotropic particles in the fields of the respective excitations, we find the acting force on the particle in inhomogeneous external fields. It is found that for optimal particles with the balanced values of the polarizabilities the potential energy and acting force are time independent.
Highlights
Let us consider an electrically small bianisotropic particle which has interconnected electric dipole and magnetic moments
In this paper we consider another aspect of the extreme properties of balanced bianisotropic particles: we study the potential energy of the particles in given fields and consider the force acting on the particles in nonuniform fields
We have considered non-resonant bianisotropic particles in the field of variously polarized electromagnetic waves
Summary
Let us consider an electrically small bianisotropic particle which has interconnected electric dipole and magnetic moments. It was found that balanced particles, such that all the polarizablities have equal strength, possess very special, and extreme properties They store maximum (or minimum, equal to zero) reactive energy in given fields [2], they are ‘‘invisible’’ for certain excitations [3], they present the optimal configurations for extracting energy from external fields [4]. We find that if the polarizabilties are balanced and the particle interacts with the incident fields optimally strong, the potential energy is time-independent This implies that the mechanical force generated by time-harmonic fields is time-independent. When external field of the orthogonal polarization acts, the particle is not excited at all, implying that the force acting on the particle is identically zero We think that this interesting property can have important implications in nanotechnologies and nanomedicine
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