How the Bubble Lens Works (IMAGE) Penn State Caption A nanoscale light beam modulated by short electromagnetic waves, known as surface plasmon polaritons -- labelled as SPP beam -- enters the bubble lens, officially known as a reconfigurable plasmofluidic lens. The bubble controls the light waves, while the grating provides further focus. Credit Tony Jun Huang, Penn State Usage Restrictions non commercial use only 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.