  A photonic jet (terajet at THz frequencies) commonly denotes a specific
spatially localized region in the near-field at the front side of a dielectric
particle with diameter comparable with wavelength illuminated with a plane wave
from its backside (i.e., the jet emerges from the shadow surface of a
dielectric particle). In this paper the formation of photonic is demonstrated
using the recently proposed 3D dielectric cuboids working in reflection mode
when the specific spatially localized region is localized towards the direction
of incidence wavefront. The results of simulations based on Finite Integration
Technique are discussed. All dimensions are given in wavelength units so that
all results can be scaled any frequency of interest including optical
frequencies, simplifying the fabrication process compared with spherical
dielectrics. The results here presented may be of interest for novel
applications including microscopy techniques and sensors.
