Fig. 2 (IMAGE) Osaka University Caption Demonstration of optical switch by controlled light (wavelength of 592 nm). The intensity of the signal light (543 nm) is switched by turning the controlled light ON or OFF. Credit Osaka University 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.