Unveiling asymmetric topological photonic states in anisotropic 2D perovskite microcavities

Emmanouil G. Mavrotsoupakis; Leonidas Mouchliadis; Junhui Cao; Minoas C. Chairetis; Marios E. Triantafyllou-Rundell; Eleni C. P. Macropulos; Giannis G. Paschos; Apostolos Pantousas; Huaying Liu; Alexey V. Kavokin; Hamid Ohadi; Constantinos C. Stoumpos; Pavlos G. Savvidis

doi:10.1038/s41377-025-01852-8

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Unveiling asymmetric topological photonic states in anisotropic 2D perovskite microcavities

Original Articles

- Unveiling asymmetric topological photonic states in anisotropic 2D perovskite microcavities
- Light: Science & Applications Vol. 14, Issue 8, Pages: 2163-2172(2025)
- Affiliations：
  
  1.Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, Heraklion 71110 Crete, Greece
  2.Department of Materials Science and Engineering, University of Crete, Heraklion, Crete 70013, Greece
  3.Key Laboratory for Quantum Materials of Zhejiang Province, Department of Physics, Westlake University, Hangzhou, People's Republic of China
  4.Westlake University, 600 Dunyu Rd, Xihu District, Hangzhou, Zhejiang 310030, People's Republic of China
  5.Center for Quantum Science & Technologies, FORTH-QuTech, Crete 70013 Heraklion, Greece
  6.Abrikosov Center for Theoretical Physics, MIPT, Dolgoprudny, Moscow Region 141701, Russia
  7.Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
  8.SUPA, School of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS, UK
  9.Photonics of Crystals Laboratory, Saint Petersburg State University, Ulyanovskaya d.1, St. Petersburg 198504, Russia
- Author bio：
  
  Pavlos G. Savvidis (p.savvidis@westlake.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-01852-8
  CLC：
- Received：06 November 2024，
  
  Revised：13 March 2025，
  
  Accepted：26 March 2025，
  
  Published Online：29 May 2025，
  
  Published：31 August 2025
- Accepted：
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Mavrotsoupakis, E. G. et al. Unveiling asymmetric topological photonic states in anisotropic 2D perovskite microcavities. Light: Science & Applications, 14, 2163-2172 (2025).
DOI：

Mavrotsoupakis, E. G. et al. Unveiling asymmetric topological photonic states in anisotropic 2D perovskite microcavities. Light: Science & Applications, 14, 2163-2172 (2025). DOI： 10.1038/s41377-025-01852-8.

摘要

Abstract

Photonic Rashba-Dresselhaus coupling in anisotropic microcavities offers a compelling platform for realizing unconventional topological states with non-zero Berry curvature. In this study

we explore a self-assembled two-dimensional hybrid structure composed of anisotropically oriented organic/inorganic halide perovskite layers confined within a microcavity. The strong optical anisotropies of these perovskite systems

driven by significant refractive index contrasts and robust excitonic resonances at room temperature

enable the emergence of synthetic magnetic fields that mediate photonic and polaritonic interactions. The interplay between polarization-dependent modes and spatial inversion symmetry breaking gives rise to strong photonic Rashba-Dresselhaus spin-orbit coupling

leading to distinct modifications in band topology and energy dispersions. These effects result in the formation of unconventional topological features

including non-zero Berry curvature and off-axis diabolical points

within the photonic and polaritonic bands at room temperature. Our findings reveal the critical role of optical and geometric anisotropies in engineering synthetic gauge fields for light

providing a versatile approach for designing photonic systems with novel topological properties. By leveraging the unique properties of halide perovskites and their ability to support both room-temperature excitons and large birefringence

this work advances the development of polaritonic platforms for applications in topological photonics and spinoptronics.

关键词

Keywords

references

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