Vortex beam generator (IMAGE) Optica Caption Researchers 3D-printed a low-cost and efficient device that generates twisting light beams with orbital angular momentum and features integrated gain-filtering. Credit Yuanxi Cao, Xi’an Jiaotong University Usage Restrictions None 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.