Scanning electron micrograph of a topological vortex laser based on non-Hermitian photonic crystals. Selected for an Editors’ Suggestion.

From the article:

Spin-Momentum-Locked Edge Mode for Topological Vortex Lasing
Zhen-Qian Yang, Zeng-Kai Shao, Hua-Zhou Chen, Xin-Rui Mao, and Ren-Min Ma
Phys. Rev. Lett. 125, 013903 (2020)

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