Effects of dielectric thickness on optical behavior and tunability of one-dimensional Ag/SiO₂ multilayered...

We fabricated one-dimensional periodic multilayered metamaterial structures consisting of Ag and SiO₂alternating layers. Optical responses, such as transmission and absorption, are consistent well within finite difference time domain (FDTD) simulations. Angle dependent real and imaginary dielectric permittivity reflection spectra demonstrate their operational capability in the visible wavelength region. This multilayer metamaterial can be converted into a photonic crystal by manipulating the thickness of SiO₂ and we demonstrate that proper filling of SiO₂/Ag layers the operating wavelength can be tuned to higher wavelength region. However, absolute value of transmission reduces with increasing number of multilayer pairs due to metal absorption.