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Electromagnetic time-reversal enabling potential super-resolution in telecommunication systems when operated within complex media — imaging is left aside from now — has been much studied, in particular since [1]. Yet it remains a controversial issue [2]. Here, one illustrates what could be the behavior of a radiating broad-frequency device when operated in a properly-structured, finitely-extended...
Since subnanosecond pulses are short compared to the membrane charging time of biological cells, they penetrate the cells, allowing direct electric field interaction with cell substructures. The use of such ultrashort pulses (with risetimes on the order of 100 ps) also provides an opportunity of using antennas, rather than solid electrodes, to deliver the electromagnetic energy to biological targets...
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