On the physical realizability of highly focused electromagnetic field distributions.
A method to evaluate the physical realizability of an arbitrary three-dimensional vectorial field distribution in the focal area is proposed. A parameter that measures the similarity between the designed (target) field and the physically achievable beam is provided. This analysis is carried out within the framework of the closest electromagnetic field to a given vectorial function, and the procedure is applied to two illustrative cases.
Universidad Complutense de Madrid, Facultad de Ciencias Físicas, Departamento de Óptica, Ciudad Universitaria, Madrid, Spain.
Rosario
R
Martínez-Herrero
Ignasi
I
Juvells
Artur
A
Carnicer