Subwavelength focusing and imaging from the far field using time reversal in subwavelength scaled resonant media


In this talk we will show how the use of time dependent and broadband wave fields, in conjunction with media structured at the subwavelength scale and supporting resonant eigenmodes, permits to beat the diffraction limit from the far field for imaging or focusing purposes. Examples will be given in the microwave, the acoustic, and the optical domain. 

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