Modulation of localized surface plasmon resonance of the titanium nitride nanoparticle array based on graphene

Modulation of the localized surface plasmon resonance (LSPR) of the titanium nitride (TiN) nanoparticle array based on graphene is investigated by using the three-dimensional (3D) finite-difference time-domain (FDTD) methods. The results show that the LSPR of the TiN nanoparticle array has two peaks centered at about 530 nm and 780 nm in visible and near-infrared regions, and the total absorption of TiN nanoparticle array is about two times larger than that of Ag and Au nanoparticle array from 400 nm to 1200 nm. The LSPR of the TiN nanoparticle array can be tuned by varied the parameters of the TiN nanoparticle array and the graphene Fermi energy. Then, an optimized scheme of our model is put forward. This study demonstrates that TiN is a promising alternative plasmonic material in visible and near-infrared regions, and the LSPR of the TiN nanaoparticles can be actively modulated by the introduction of the graphene.