Abbreviated Journal Title
DIOXIDE THIN-FILMS; VANADIUM DIOXIDE; OPTICAL-PROPERTIES; VO2; TRANSITION; SURFACE; MICROSTRUCTURE; DEPOSITION; DESIGN; Optics
For the first time, a tunable reflected phase reflectarray is demonstrated in the thermal infrared. This is done using thermochromic VO2 square-patch elements in a reflectarray metamaterial configuration. A sixty degree change in reflected phase is measured using a Twyman-Green interferometer, and FTIR measurements show that the resonance reflection minima shifts from 9.2 to 11.2 mu m as the sample is heated from 45 through 65 degrees C. These results are in agreement with finite-element method simulations using the optical properties of VO2 which are measured by infrared ellipsometry.
Shelton, D. J.; Coffey, K. R.; and Boreman, G. D., "Experimental demonstration of tunable phase in a thermochromic infrared-reflectarray metamaterial" (2010). Faculty Bibliography 2010s. 773.