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. 2022 May 4;9(5):1483–1499. doi: 10.1021/acsphotonics.1c01874

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© 2022 The Authors. Published by American Chemical Society

Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).

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TINPs and hybrid systems: (a) Schematic of a topological insulator nanoparticle (TINP), showing bulk and surface states. (b) Discretization of Dirac cone for small nanoparticles, with energy level separation near the Dirac point inversely proportional to particle radius, a, and directly proportional to material-dependent constant A. Transitions between energy levels are facilitated by the absorption or emission of THz light. (c) Schematic of TINP in a cavity setup for lasing. (d) Hybrid system of a quantum emitter close to the surface of a TINP. Parts (a)–(c) taken from ref (23) and licensed under CC BY 4.0, https://creativecommons.org/licenses/by/4.0/.