M.Sc Thesis

M.Sc StudentNogin Yevgeni
SubjectSelf-Forces on Photon Emitters near Symmetrical
DepartmentDepartment of Electrical and Computer Engineering
Supervisor PROF. Meir Orenstein
Full Thesis textFull thesis text - English Version


In this research we perform a computational and theoretical study of forces induced by electromagnetic waves in the nano-photonic setting. We will concentrate our results on the radiation self-force, or radiation-recoil force, which is exerted on an emitter by the fields generated by itself and scattered from the environment. Controlling and understanding this force can enable advanced manipulation of nanometer-sized light emitters. By designing special nano-structures in its vicinity, one can create stability points in the recoil-force field for an emitter. Our computational results show how and when the stability points can be made to coincide with radiative hot-spots. This interesting fact can be used to make an emitter self-position itself for optimal radiative emission coupling.

The basic properties that affect the attractive or repulsive nature of the self-force near materials are their dielectric parameters. We will show how specially crafted Epsilon-Near-Zero meta-materials can reverse the direction of the self-force in different geometries. We perform the analysis on the geometries of spheres, spherical cavities and symmetrical sphere clusters and discuss the conditions for emitter stability in radiative hot-spots. The Sphere Clusters are shown to support the sought after stability points and at the same time, being open electromagnetic systems - allowing for possible experimental realization.

In order to compute the relevant quantities, we develop a theoretical formalism for the analysis of localized fields scattered by nano-sphere clusters having point-group symmetries. We develop a multipolar multi-scattering formalism for the computation of the Dyadic Green's Function of a nano-structure.