  We investigate the imaging properties of copper-based superlens surrounded by
copper oxide (Cu$_2$O). A subwavelength image resolution of the order
$\lambda/9$ is demonstrated theoretically and verified in numerical
simulations. It is shown that the existence of excitons in Cu$_2$O influence
the static and dynamical optical properties of the lens. In particular, an
improvement of image quality caused by absorption in the spectral region of
excitonic resonances is investigated. The plasmon-exciton interaction in the
system may pave the way to a tunable, highly nonlinear superlens designs.
