Optical properties of the Vanadium dioxide

Abstract

The vanadium dioxide is a material thermo chromium which sees its optical properties changing at the time of the transition from the phase of semiconductor state ↔ metal, at a critical temperature of 68°C. The study of the optical properties of a thin layer of VO₂ thickness 82 nm, such as the dielectric function, the index of refraction, the coefficient ofextinction, the absorption’s coefficient, the reflectivity, the transmittivity, in the photonic spectrum of energy ω located inthe interval: 0.001242 ≤ ω (ev) ≤ 6, enables us to control well its practical utility in various applications, like the intelligentpanes, the photovoltaic, paintings for increasing energy efficiency in buildings, detectors of infra-red (I.R) or ultra-violet(U.V). We will make simulations with Maple and compare our results with those of the literature

Comparative Study of Various Thermal Analyses of Smart Windows in Cubic Building Design

“…He highlighted its reversible phase transition [19][20][21][22][23][24][25] from the semiconductor state to its metal state at a transition temperature Tc = 68°C. This phase transition then generates the changes of the optical properties of this material [26][27][28][29][30] within the infra-red range. Within this framework, one observes an important variation in the transmission of VO2 film between the insulating state, characterized by a high transmission (42% at 5°C), and the metal state, where the transmission is very weak (5% at 100°C).…”

Information Restitution in the Optical Memories using a Thin Layer of the Vanadium Dioxide

“…This phase transition causes enormous changes in the optical and electrical properties of this material [14][15][16][17][18] in the near infrared. Below the transition temperature the resistivity [19] decreases exponentially as the temperature increases.…”