Far field subwavelength imaging and focusing using a wire medium based resonant metalens - Physics > OpticsReport as inadecuate




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Abstract: This is the second article in a series of two dealing with the concept of-resonant metalens- we introduced recently Phys. Rev. Lett. 104, 2039012010. It is a new type of lens capable of coding in time and radiatingefficiently in the far field region sub-diffraction information of an object. Aproof of concept of such a lens is performed in the microwave range, using amedium made out of a square lattice of parallel conducting wires with finitelength. We investigate a sub-wavelength focusing scheme with time reversal anddemonstrate experimentally spots with focal widths of {\lambda}-25. Through across-correlation based imaging procedure we show an image reconstruction witha resolution of {\lambda}-80. Eventually we discuss the limitations of such alens which reside essentially in losses.



Author: Fabrice Lemoult, Geoffroy Lerosey, Mathias Fink

Source: https://arxiv.org/







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