Fig 1 (IMAGE) National Research Council of Science & Technology Caption Observe the metastructure and optical constants of the palladium-catalyzed reaction as a function of the concentration ratio of hydrogen and oxygen, the thickness of the resulting water layer, and the resulting terahertz signal changes. Credit Korea Institute of Science and Technology(KIST) Usage Restrictions The sources of photos and research results from KIST must be specified. License Original 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.