PSU Sign (IMAGE) Penn State Caption This is an infrared image of metadevice composed of vanadium dioxide with gold patterned mesh. (Top) Device without any electric current showing the PSU cut from the pattern and reflective. (Middle) Device with 2.03 amps of current. The PSU and background now appear the same, the PSU has faded into the background. (Bottom) Device with 2.20 amps of current. The background is now reflective while the PSU is not. Credit Douglas Werner, Penn State Usage Restrictions Non commercial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.