Temperature dependence of the polarization, dielectric constant, damping constant and the relaxation time close to the ferroelectric-paraelectric phase transition in LiNbO3

Investigation of optical absorption enhancement of plasmonic configuration by graphene on LiNbO3-SiO2 structure

“…The absorption spectra curves with different testing temperature are shown in figure 6. Although LiNbO 3 is a material that the polarization is temperature-dependent, the orientation of polarization in the present G-LNOI sample is parallel to the interface between graphene and LiNbO 3 , the change on crystal polarization exerts a very limited effect on the electrical properties of graphene and would be ignored in the following discussion [37]. The effect of variable temperature on the absorption is mainly manifested in the following three aspects: (1) The position of absorption peak has a slightly shift when testing temperature increases from room temperature to 350 °C, which is attributed to the influence of the temperaturedependent FP cavity length.…”