Room Temperature Optical Constants and Band Gap Evolution of Phase Pure M1-VO2 Thin Films Deposited at Different Oxygen Partial Pressures by Reactive Magnetron Sputtering
Figure 4
(a) and (b) versus which is determined from extinction coefficient and the extrapolating dashed lines are drawn to obtain the value of the band gap and , respectively. (b) is the enlarged low photon energy portion of versus . (c) Schematic diagram of electronic band structures in the VO2 film. (d) Variation of optical band gap of VO2 thin films deposited at different O2-Ar ratios.
