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We use both FEM (finite element method) and FDTD (finite difference timedomain method) to simulate the field distribution in Maxwell's fish eye lenswith one or more passive drains around the image point. We use the sameMaxwell's fish eye lens structure as the one used in recent microwaveexperiment [arXiv:1007.2530]: Maxwell's fish eye lens bounded by PEC (perfectelectric conductor) is inserted between two parallel PEC plates (as a waveguidestructure). Our simulation results indicate that if one uses an active coaxialcable as the object and set an array of passive drains around the image region,what one obtains is not an image of the object but only multiple spotsresembling the array of passive drains. The resolution of Maxwell's fish eye isfinite even with such passive drains at the image locations. We also found thatthe subwavelength spot around the passive drain is due to the local fieldenhancement of the metal tip of the drain rather than the fish eye medium orthe ability of the drain in extracting waves.

Can Maxwell's Fish Eye Lens Really Give Perfect Imaging? Part II. The case with drains