  Tunable dielectric meta-surface nanostructures offer incredible performance
in optical application due to their extraordinary tunability of the
polarization and engineering the dispersion of light with low loss in infrared
range. In this article, we designed and experimentally measured the tunability
of all-dielectric subwavelength silicon nanoparticles with the help of the
temperature-based refractive index of the liquid crystal in the telecom regime.
The proposed structure composed of high dielectric nanodisk surrounded by
nematic liquid crystal (NLC) is simulated with numerical software, assembled
with pre-alignment material, and optically measured by Fourier-transform
infrared (FTIR) spectroscopy. The simulated result is compatible with the
practical measurements, shows that the tunability of 30nm is achieved. Electric
and magnetic resonance modes of the high dielectric nanodisks are tailored in
different rates by anisotropic temperature dependent NLC. The phase switching
of anisotropic to isotropic nematic liquid crystal enables spectral tunning of
the two modes of all dielectric metasurface and modifies the symmetry of the
optical response of the metamaterial structure.
