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PreprintCC BY-NC-ND 4.0arXiv

Topological charge switching in trapped polariton condensates

  • Jaewon Kim
  • Hyun Gyu Song
  • Daegwang Choi
  • Yong-Hoon Cho
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Abstract

Topological charges in photonic systems provide a robust degree of freedom with direct applications in optical information processing. Bound states in the continuum (BICs) in photonic crystal slabs inherently carry such quantized topological charges, yet they are topologically protected, making active reconfiguration fundamentally challenging. Here, we demonstrate topological charge switching in trapped BIC polariton condensates in a photonic crystal, where spatial modulation of the photonic crystals supports multiple confined states, each carrying a distinct charge. Trapped condensates within the Dirac bandgap are expelled into the leaky band via polariton blueshift, enabling single-mode selection by solely tuning the excitation power. This work offers a platform for optically controlling topological charges by harnessing polariton nonlinearity.

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Cite

BibTeXRIS
BibTeX
@misc{kim2026topological,
  title = {{Topological charge switching in trapped polariton condensates}},
  author = {Jaewon Kim and Hyun Gyu Song and Daegwang Choi and Yong-Hoon Cho},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.00979},
  eprint = {2609.00979},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.00979},
  note = {CC BY-NC-ND 4.0},
}
RIS
TY  - UNPB
TI  - Topological charge switching in trapped polariton condensates
AU  - Jaewon Kim
AU  - Hyun Gyu Song
AU  - Daegwang Choi
AU  - Yong-Hoon Cho
PY  - 2026
DA  - 2026/09/01
PB  - arXiv
DO  - 10.48550/arxiv.2609.00979
UR  - https://arxiv.org/abs/2609.00979
AB  - Topological charges in photonic systems provide a robust degree of freedom with direct applications in optical information processing. Bound states in the continuum (BICs) in photonic crystal slabs inherently carry such quantized topological charges, yet they are topologically protected, making active reconfiguration fundamentally challenging. Here, we demonstrate topological charge switching in trapped BIC polariton condensates in a photonic crystal, where spatial modulation of the photonic crystals supports multiple confined states, each carrying a distinct charge. Trapped condensates within the Dirac bandgap are expelled into the leaky band via polariton blueshift, enabling single-mode selection by solely tuning the excitation power. This work offers a platform for optically controlling topological charges by harnessing polariton nonlinearity.
ER  -