Effect of morphology of nanoparticles on performance of transparent display

Abstract

Nanoparticles based transparent display is one of the most successful methods to realize transparent monitors. Also, an array of nanoparticles, especially aperiodic arrangements, plays an important role in this case. Normally, when one talks about nanoparticles, the spherical morphology appears in mind, in which it is possible to implement different morphology for nanoparticles. In this paper, six different classes of morphologies with various arrangements, such as periodic array and deterministic aperiodic arrays, have been investigated to propose a high-performance transparent display. We compare different morphologies of Si–SiO2 nanoparticles at RGB (Red, Green, Blue) wavelengths in different types of arrays to find the highest scattering cross-section. Our calculations and figure of merit depending on the optical properties of nanoparticles, such as the resonance wavelength, the extinction, scattering and absorption cross-section, and the scattering to absorption ratio (SAR). We will show that in the proposed structures, there are suitable parameters to provide higher scattering cross-section as well as narrow bandwidth in which that is equivalent to introduce the maximum transparency and contrast ratio of transparent monitor. We use the Finite-Difference Time-Domain (FDTD) numerical method to simulate and calculate the deterministic aperiodic and periodic arrays of nanoparticles. Finally, we obtain the absorption and scattering cross-sections for six classes of nanoparticles: Cube, Sphere, Disk, Oblate ellipse, Prolate ellipse, and Pyramid into aperiodic and periodic arrays.