We present an active physical implementation of the recently introduced
plasmon injection loss compensation scheme for Pendry's non-ideal negative
index flat lens in the presence of realistic material losses and
signal-dependent noise. In this active implementation, we propose to use a
physically convolved external auxiliary source for signal amplification and
suppression of the noise in the imaging system. In comparison with the previous
passive implementations of the plasmon injection scheme for sub-diffraction
limited imaging, where an inverse filter post-processing is used, the active
implementation proposed here allows for deeper subwavelength imaging far beyond
the passive post-processing scheme by extending the loss compensation to even
higher spatial frequencies.Comment: 13 pages, 15 figure
