Piezotronic Logic (1 of 3) (IMAGE) Georgia Institute of Technology Caption Georgia Tech researchers measure the performance of a piezo-phototronic device in which a laser changes the conductance of a metal contact attached to a zinc oxide structure. Credit Credit: Gary Meek Usage Restrictions None 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.