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Fig. 2 | eLight

Fig. 2

From: Highlighting photonics: looking into the next decade

Fig. 2

a Artistic illustration of the first demonstrated topological insulator laser, where lasing goes around the perimeter unobstructed by sharp corners or disorder, exiting from the output port [91, 101] (Credit: Miguel Bandres, UCF). b Artist's impression of an electrically-driven topological quantum cascade laser, established based on the valley-Hall edge modes [102] (Credit: Songdi Tech Co, Ltd)

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