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https://viterbischool.usc.edu/news/2021/02/breakthrough-in-quantum-photonics-promises-a-new-era-in-optical-circuits/figurephotonics/ FigurePhotonics - USC Viterbi | School of Engineering Jan 12, 2021 - Figure. (a) Scanning electron microscope (SEM) image of starting nanometer-sized mesa array created on flat semiconductor substrate (b) Schematic of mesa... school ofuscviterbiengineering