Cooling membranes with a laser (IMAGE) University of Basel Caption In the Basel experiment, a laser beam is directed onto a membrane (square in the middle). Using the reflected laser light, delayed by a fibre optic cable (violet), the membrane is then cooled down to less than a thousandth of a degree above absolute zero. Credit University of Basel, Department of Physics Usage Restrictions Only to be used in reporting on the related press release 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.