Abstract

Vanadium dioxide is known to undergo a first order phase transformation at approximately 67°C. In its low temperature state (T<67°C) VO₂ has a monoclinic structure, is semiconductive, and exhibits high transmission of a range of IR wavelengths. At temperatures greater than 67°C VO₂ reverts to a tetragonal structure, becomes conductive, and exhibits high reflectance.¹ The absorption coefficient of VO₂ is relatively high below one micron² and above thirteen microns³; therefore, changes in the optical properties of VO₂ can be used most effectively between these wavelengths.

© 1988 Optical Society of America