Theory of the time reversal cavity for electromagnetic fields.
We derive a general expression of the electric dyadic Green function in a time-reversal cavity, based on vector diffraction theory in the frequency domain. Our theory gives a rigorous framework to time-reversal experiments using electromagnetic waves and suggests a methodology to design structures generating subwavelength focusing after time reversal.
Carminati
R
R
Laboratoire d'Energétique Moléculaire et Macroscopique, Combustion, Ecole Central Paris, Centre National de la Recherche Scientifique, Châtenay-Malabry, France. remi.carminati@ecp.fr
Pierrat
R
R
de Rosny
J
J
Fink
M
M