Quantum-sized topological insulator/semimetal enables ultrahigh and broadband saturable absorption

Zhexue Chen,Xinyu Sui,Zhangqiang Li,Yueqi Li,Xinfeng Liu,Yong Zhang

Nanoscale horizons（2023）

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摘要

Topological insulator and semimetal QSs with monolayer structures and sub-4 nm lateral sizes demonstrate exceptional NSA performances with ultrahigh nonlinear response (72.4 and 68.4%) and ultralow power excitation (0.49 and 0.80 MW cm −2 ).

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absorption,insulator/semimetal enables,quantum-sized

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