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1. Topological Microlaser with a Non-Hermitian Topological Bulk

   https://doi.org/10.1103/PhysRevLett.131.023202  

   Li, Zhitong; Luo, Xi-Wang; Lin, Dayang; Gharajeh, Abouzar; Moon, Jiyoung; Hou, Junpeng; Zhang, Chuanwei; Gu, Qing (July 2023, Physical Review Letters)
2. Topological Spaser

   https://doi.org/10.1103/PhysRevLett.124.017701  

   Wu, Jhih-Sheng; Apalkov, Vadym; Stockman, Mark I. (January 2020, Physical Review Letters)

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3. Topological electronics

   https://doi.org/10.1038/s42005-021-00569-5  

   Gilbert, Matthew J. (December 2021, Communications Physics)

   null (Ed.)

   Abstract Within the broad and deep field of topological materials, there are an ever-increasing number of materials that harbor topological phases. While condensed matter physics continues to probe the exotic physical properties resulting from the existence of topological phases in new materials, there exists a suite of “well-known” topological materials in which the physical properties are well-characterized, such as Bi 2 Se 3 and Bi 2 Te 3 . In this context, it is then appropriate to ask if the unique properties of well-explored topological materials may have a role to play in applications that form the basis of a new paradigm in information processing devices and architectures. To accomplish such a transition from physical novelty to application based material, the potential of topological materials must be disseminated beyond the reach of condensed matter to engender interest in diverse areas such as: electrical engineering, materials science, and applied physics. Accordingly, in this review, we assess the state of current electronic device applications and contemplate the future prospects of topological materials from an applied perspective. More specifically, we will review the application of topological materials to the general areas of electronic and magnetic device technologies with the goal of elucidating the potential utility of well-characterized topological materials in future information processing applications. 

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4. Topological nanospaser

   https://doi.org/10.1515/nanoph-2019-0496  

   Ghimire, Rupesh; Wu, Jhih-Sheng; Apalkov, Vadym; Stockman, Mark I. (March 2020, Nanophotonics)

   null (Ed.)

   Abstract We propose a nanospaser made of an achiral plasmonic–metal nanodisk and a two-dimensional chiral gain medium – a monolayer nanoflake of a transition-metal dichalcogenide (TMDC). When one valley of the TMDC is selectively pumped (e.g. by a circular-polarized radiation), the spaser (surface plasmon amplification by stimulated emission of radiation) generates a mode carrying a topological chiral charge that matches that of the gain valley. There is another, chirally mismatched, time-reversed mode with exactly the same frequency but the opposite topological charge; it is actively suppressed by the gain saturation and never generates, leading to a strong topological protection for the generating matched mode. This topological spaser is promising for use in nano-optics and nanospectroscopy in the near field especially in applications to biomolecules that are typically chiral. Another potential application is a chiral nanolabel for biomedical applications emitting in the far field an intense circularly polarized coherent radiation. 

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5. Topological acoustofluidics

   https://doi.org/10.1038/s41563-025-02169-y  

   Zhao, Shuaiguo; Tian, Zhenhua; Shen, Chen; Yang, Shujie; Xia, Jianping; Li, Teng; Xie, Zhemiao; Zhang, Peiran; Lee, Luke P; Cummer, Steven A; et al (March 2025, Nature Materials)