  Resonant lattice Kerker effect in periodic resonators is one of the most
interesting generalizations of the Kerker effect that relates to various
fascinating functionalities such as scattering management and Huygens
metasurfaces. However, so far this effect has been shown to be sensitive to the
incident polarization, restricting its applications. Here, we report, for the
first time, polarization-independent resonant lattice Kerker effect in
metasurfaces composed of periodic Ge$_2$Se$_2$Te$_5$ (GST) disks. For such a
metasurface of square lattice, the spectrally overlap of the electric dipole
and magnetic dipole surface lattice resonances can be realized by choosing an
appropriate GST crystalline fraction regardless of the incident polarization.
The operation wavelength and the required GST crystalline fraction can be
conveniently tuned over large ranges since these parameters scale linearly with
the disk size and the lattice period, greatly facilitating the design. Making
use of the obtained resonant lattice Kerker effect, we realize a reconfigurable
and polarization-independent lattice Huygens' metasurface with a dynamic phase
modulation of close to $2\pi$ and high transmittance. This work will advance
the engineering of the resonant lattice Kerker effect and promote its
applications in phase modulation and wavefront control.
