  Magnetic skyrmions are topological quasiparticles in magnetic field. Until
recently, as one of their photonic counterparts, N\'eel-type photonic skyrmion
is discovered in surface plasmon polaritons. The deep-subwavelength features of
the photonic skyrmions suggest their potentials in quantum technologies and
data storage. So far, the Bloch-type photonic skyrmion has yet to be
demonstrated in this brand new research field. Here, by exploiting the quantum
spin Hall effect of a plasmonic optical vortex in multilayered structure, we
predict the existence of photonic twisted-N\'eel- and Bloch-type skyrmions in
chiral materials. Their chirality-dependent features can be considered as
additional degrees-of-freedom for future chiral sensing, information processing
and storage technologies. In particular, our findings enlarge the family of
photonic skyrmions and reveal a remarkable resemblance of the feature of chiral
materials in two seemingly distant fields: photonic skyrmions and magnetic
skyrmions.
