Ever since its discovery in 2004, graphene, the honey-comb arranged sheet of one atom thick carbon atoms, has continued to make waves in both the physics and engineering worlds. Now comes news from yet another research team heralding a new found property of the fascinating material. This time, as the group describe in their paper published in Physical Review Letters, it’s been found to have optical gain properties as a result of population inversion of electrons when struck with a short blast from a laser.
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