Optical constants of VO2 (Vanadium dioxide)
Beaini et al. 2020: n,k 0.5–25 µm; 100 °C
Complex refractive index (n+ik)
Derived optical constants
Conditions
temperature: 373 film_thickness: 7.0E-8 substrate: SiO2
Comments
70 nm-thick VO2 film deposited on SiO2 substrate. 100 °C.
References
R. Beaini, B. Baloukas, S. Loquai, J.E. Klemberg-Sapieha, L. Martinu. Thermochromic VO2-based smart radiator devices with ultralow refractive index cavities for increased performance. Sol. Energy Mater. Sol. Cells 205, 110260 (2020) (Data points extracted from Fig. 1)
Data
Additional information
About Vanadium dioxide
Vanadium dioxide (VO2) is a unique compound with a characteristic metal-insulator transition. At temperatures below 67°C, VO2 acts as an insulator but rapidly becomes a conductor when heated above this threshold. This swift phase transition is accompanied by a structural change from a monoclinic to a tetragonal lattice. Because of this distinctive property, VO2 has garnered significant attention for potential applications in electronics, particularly as a switch or in thermochromic devices. For example, its use in smart windows allows for the regulation of infrared radiation, enabling energy savings by blocking heat during summer or retaining it during winter. Furthermore, researchers have been exploring its potential in high-frequency electronics and optoelectronic devices.
Other names and variations:- VO2
- Divanadium tetroxide
- Vanadium(IV) oxide