  Many modern applications like entertainment displays, data encryption,
security, and virtual reality (VR) technology require asymmetric light
manipulation. Symmetric spin-orbit interactions (SOI) apply a limit in
achieving an asymmetrical metahologram. However, different reported asymmetric
SOI's based on propagation and geometric phase mergence techniques effectively
break this limit at the expense of design complexity and greater computation
cost. This work proposes a novel helicity multiplexing technique that breaks
all the aforementioned barriers in achieving on-axis dual side holograms.
Benefiting from the geometric phase modulation of anisotropic nano-resonating
antennas, we have employed a single unit cell to achieve helicity multiplexing.
A low extinction coefficient material a-Si:H is used for device analysis. Due
to the simple single unit cell-based designing technique, simulation and
fabrication complexities were significantly reduced. As a result, based on the
helicity and incidence direction of electromagnetic wave, we have achieved
highly transmissive dual holographic images in the visible band. Our simulated
efficiencies are 55%, 75%, and 80% for the blue ({\lambda} = 488 nm), green
({\lambda} = 532 nm), and red light ({\lambda} = 633 nm).
