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January 26, 2026Nano LettersOpen Access

Nonreciprocal Negative Refraction Enabled by Photonic Time Crystals

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Authors

MTMohammad Reza TavakolWCWenshan Cai

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Overview

Theoretical framework demonstrates nonreciprocal negative refraction in photonic time crystals, suggesting new design possibilities.

Key Points

  • This work aims to demonstrate nonreciprocal negative refraction using time-varying photonic structures.
  • Proposed two designs: optical multilayer structure and microwave wire medium.
  • Utilized Floquet harmonic expansions for analysis.
  • Validated findings with a customized harmonic-balance finite-element solver.
  • Achieved isolation exceeding 46 dB in optical devices.
  • Obtained isolation of 11 dB in microwave designs.
  • Demonstrated the feasibility of time-varying metasurfaces for nonreciprocal negative refraction.

Cite This Study

Tavakol et al. (2026) studied this question.

synapsesocial.com/papers/69770353722626c4468e8657https://doi.org/10.1021/acs.nanolett.5c06214
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