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.
© 2007 Optical Society of America
Original Manuscript: July 6, 2007
Revised Manuscript: September 26, 2007
Manuscript Accepted: October 1, 2007
Published: October 19, 2007
R. Carminati, R. Pierrat, J. de Rosny, and M. Fink, "Theory of the time reversal cavity for electromagnetic fields," Opt. Lett. 32, 3107-3109 (2007)