  Broken-supersymmetry is used to define a reflectionless active cavity capable
of amplifying electromagnetic radiation in the visible. The approach is
analytical through the use of the Darboux transform for the generation of the
optical potential and the calculation of its solution, while the
transmission/reflection spectra evaluation is done with the Transfer Matrix
method. Interestingly, the proposed device behaves as a dynamic optical filter
amplifying radiation arriving at large angles while for other directions is
almost completely transparent. Thus, simply by rotation different
functionalities can be obtained. In addition the active filter is
reflectionless for all wavelengths and angles of incidence. The necessary
Kramers-Kronig relations are also satisfied being the model compatible with the
Drude model at high frequency i.e. far from absorption resonances.
