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<p>Broadband achromatic meta-devices have emerged as a transformative platform for dispersion-engineered wavefront manipulation, offering significant potential for full-color imaging, multi-band spectral sensing, and integrated photonic systems. However, realizing spin-unlocked achromatic functionality remains fundamentally challenging due to the intrinsic dispersion correlations between orthogonal spin channels in conventional metasurface architectures. Here, we propose a hybrid-phase strategy that synergistically combines the distinct dispersion characteristics of Aharonov-Anandan and Pancharatnam-Berry geometric phases. This mechanism is implemented through a single-layer double-arc meta-structure that enables broadband achromatic wavefront control with complete spin-channel independence. As experimental validation, we demonstrate spin-unlocked achromatic meta-devices including dual-functionality beam deflectors and high-efficiency meta-lenses, both exhibiting broadband chromatic-aberration-free performances. This approach establishes a new paradigm for spin-unlocked achromatic metasurfaces and paves the way for multi-channel optical imaging, on-chip spectral detection, and other emerging spin-photonic applications.</p>

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Broadband spin-unlocked achromatic meta-devices empowered by hybrid-phase cooperative dispersion engineering

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月16日

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  • Jiahao Wang,
  • Kai Qu,
  • Junzhe Ni,
  • Weixu Yang,
  • Kui Tang,
  • Shufang Dong,
  • Shaojie Wang,
  • Junming Zhao,
  • Tian Jiang,
  • Ke Chen,
  • Yijun Feng

摘要

Broadband achromatic meta-devices have emerged as a transformative platform for dispersion-engineered wavefront manipulation, offering significant potential for full-color imaging, multi-band spectral sensing, and integrated photonic systems. However, realizing spin-unlocked achromatic functionality remains fundamentally challenging due to the intrinsic dispersion correlations between orthogonal spin channels in conventional metasurface architectures. Here, we propose a hybrid-phase strategy that synergistically combines the distinct dispersion characteristics of Aharonov-Anandan and Pancharatnam-Berry geometric phases. This mechanism is implemented through a single-layer double-arc meta-structure that enables broadband achromatic wavefront control with complete spin-channel independence. As experimental validation, we demonstrate spin-unlocked achromatic meta-devices including dual-functionality beam deflectors and high-efficiency meta-lenses, both exhibiting broadband chromatic-aberration-free performances. This approach establishes a new paradigm for spin-unlocked achromatic metasurfaces and paves the way for multi-channel optical imaging, on-chip spectral detection, and other emerging spin-photonic applications.