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Researchers from Nanyang Technological University (NTU Singapore) and the University of Leeds (UL) have created what they believe to be the first electrically driven topological laser. The use of topologically protected photonic modes enables this laser to efficiently bypass manufacturing defects as well as corners.
In the 1980s, scientists found that electrons flowing in certain materials had “topological features”; that is, they could flow around corners or imperfections without scattering or leaking. In collaboration with material scientists from UL, the NTU Singapore team applied this topological approach to photons. The researchers worked with a quantum cascade laser based on advanced semiconductor wafers developed…READ MORE