Nonlinear Mirror (IMAGE) Technical University of Munich (TUM) Caption This is the 400-nanometer-thick nonlinear mirror that reflects frequency-doubled output using input light intensity as small as that of a laser pointer. Credit University of Texas, Austin 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.