  This work presents a new super-resolution imaging approach by using
subwavelength hole resonances. We employ a subwavelength structure in which an
array of tiny holes are etched in a metallic slab with the neighboring distance
$\ell$ that is smaller than half of the wavelength. By tuning the incident wave
at resonant frequencies, the subwavelength structure generates strong
illumination patterns that are able to probe both low and high spatial
frequency components of the imaging sample sitting above the structure. The
image of the sample is obtained by performing stable numerical reconstruction
from the far-field measurement of the diffracted wave. It is demonstrated that
a resolution of $\ell/2$ can be obtained for reconstructed images, thus one can
achieve super-resolution by arranging multiple holes within one wavelength.
  The proposed approach may find applications in wave-based imaging such as
electromagnetic and ultrasound imaging. It attains two advantages that are
important for practical realization. It avoids the difficulty to control the
distance the between the probe and the sample surface with high precision. In
addition, the numerical reconstructed images are very stable against noise by
only using the low frequency band of the far-field data in the numerical
reconstruction.
