Latest research from my collaborators at #ImperialCollegeLondon, combining #LaserPhysics and #GraphTheory: https://www.imperial.ac.uk/news/241354/spiderweb-like-lasers-emit-light-controlled-colours/

Traditional lasers amplify light by repeatedly passing it through a lasing medium between two mirrors. Instead, by structuring the lasing medium in the form of a network, we can choose which regions of the network to amplify. We can then use this freedom to select the colour emitted by the laser.