Indium Tin Oxide Nanoparticle: TiO2: Air Layers for One-Dimensional Multilayer Photonic Structures

Abstract

In this work we study the optical properties, by means of the transfer matrix method, of onedimensional photonic crystals in which layers of silica nanoparticles are alternated with layers of indium tin oxide nanoparticle (ITO) / titania nanoparticle mixture. The dielectric function of the mixed ITO/TiO2 nanoparticle layer is carefully accounted for with a generalized Rayleigh equation for the ternary mixture ITO:TiO2:air. We have studied the light transmission of the multilayer photonic crystal as a function of the ITO/TiO2 ratio. We observe that, by increasing the ITO content in the three-phase mixture, the intensity of the plasmon resonance in the near infrared (NIR) increases and the intensity of the photonic band gap (visible) decreases. Thus, our study is of major importance for the realization of electrochromic smart windows, in which separate and independent NIR and visible light control is required.

Review: smart windows based on photonic crystals

“…Organic electrochromic materials are rarely constructed into PCs for smart windows due to poor structural controllability and chemical stability [92]. Among inorganic electrochromic materials, Ni [93,94], Ir [95] and Co [96] oxides of anode material and W [97][98][99][100][101], V [102] and Ti [103][104][105] oxides of cathode material have been used to construct smart windows based on PCs. WO 3 has been widely used due to its excellent electrochromic performance.…”

Structural Colors Based on Amorphous Arrays Comprised Solely of Silica Particles

“…The structural color is composed of micro-structures with intervals at the wavelengths level of light. This structure causes a constructive interference effect for a specific wavelength of light and destructive interference for the other light wavelengths [1][2][3][4][5]. Additionally, structural color is generated by the Bragg's diffraction condition, upon occasion, producing a rainbow of colors [6].…”