In this work, we theoretically investigate the coupling of localized surface plasmons resonances (LSPRs) of core-shell nanoparticles embedded in the host liquid crystal, where the near eld enhancement in the host matrix tunes the optical properties. The effect of different radii of spherical core-shell nanoparticles of silver core and silicon shell (Ag@Si) in the E7 liquid crystals is also discussed. The coupling of LSPRs through the near eld enhancement in the E7LC + Ag@Si nanocomposite (NC) layer yields to tune the optical transmissions. LPSRs depend on the radii of core-shell structures shows redshift and blue shifts in which controlled transmissions of one-dimensional photonic crystals (1-DPCs) with defect of NC layer have been discussed using transfer matrix method (TMM) in this study. The lling fractions of core-shell nanostructure and the incident angles of the electromagnetic wave also affect the transmission properties of designed 1-DPC with a structure (TiO 2 |SiO 2 ) 5 |NC|(TiO 2 |SiO 2 ) 5 . The studies of proposed structure reveal to design the energy e cient optical lters, sensors, solar cells, photo-detectors and alloptical switching devices.