  Illumination of colloid sphere monolayers by circularly polarized beams
enables the fabrication of concave patterns consisting of circular nanohole
miniarrays that can be transferred into convex metal nanoparticle patterns via
a lift-off procedure. Unique spectral and near-field properties are achievable
by tuning the geometry of the central nanoring and quadrumer of slightly
rotated satellite nanocrescents and by selecting those azimuthal orientations
that promote localized plasmon resonances. The spectral and near-field effects
of hexagonal patterns made of uniform gold nanorings and nanocrescents, that
can be prepared by transferring masks fabricated by a perpendicularly and
obliquely incident single homogeneous circularly polarized beam, were studied
to uncover the supported localized plasmonic modes. Artificial rectangular
patterns made of a singlet nanoring and singlet nanocrescent as well as
quadrumer of four nanocrescents were investigated to analyze the role of
nano-object interactions and lattice type. It was proven that all
nanophotonical phenomena are governed by the azimuthal orientation independent
localized resonance on the nanorings and by the C2, C1 and U resonances on the
nanocrescents in case of $\bar{E}$-field oscillation direction perpendicular
and parallel to their symmetry axes. The interaction between localized surface
plasmon resonances on individual nano-objects is weak, whereas scattered
photonic modes have a perturbative role at the Rayleigh anomaly only on the
larger periodic rectangular pattern of miniarrays. Considerable fluorescence
enhancement of dipolar emitters is achievable at spectral locations promoting
the C and U resonances on the composing nano-objects.
