Coupling STMs with ultrafast lasers (IMAGE) Michigan State University Caption Michigan State University combined terahertz laser light, shown as a red wavy arrow, with a scanning tunneling microscope, or STM, tip — the dark pyramid shape exchanging a red electron with a sample shown with a blue surface. Credit Eve Ammerman Usage Restrictions No restrictions 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.