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<p>In this study, we demonstrate the sensing of refractive index through asymmetric surface lattice resonances (a-SLRs) in an array of gold nanodisks (AuNDs), showing significant alterations in transmission spectra at the a-SLRs and the shift of resonance wavelengths in response to changes in the refractive index of the surrounding media. We investigate the sensitivity of our approach by utilizing a water-glycerol mixture with different composition ratios, illustrating that the AuND array with the a-SLRs exhibits twice the sensitivity compared to the single AuND relying on localized surface plasmon resonance. Furthermore, the angle-dependent transmission spectra are examined to assess the feasibility of the AuND array with the a-SLRs for sensing applications.</p>

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Asymmetric surface lattice resonances in the gold nanodisk array for highly sensitive refractive index sensing

  • 期刊论文

  • 发表日期：

    2025年10月20日

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  • Muhammad Sujak,
  • Evan S. H. Kang,
  • Hyunwoo Kim,
  • Kyoung-Ho Kim

摘要

In this study, we demonstrate the sensing of refractive index through asymmetric surface lattice resonances (a-SLRs) in an array of gold nanodisks (AuNDs), showing significant alterations in transmission spectra at the a-SLRs and the shift of resonance wavelengths in response to changes in the refractive index of the surrounding media. We investigate the sensitivity of our approach by utilizing a water-glycerol mixture with different composition ratios, illustrating that the AuND array with the a-SLRs exhibits twice the sensitivity compared to the single AuND relying on localized surface plasmon resonance. Furthermore, the angle-dependent transmission spectra are examined to assess the feasibility of the AuND array with the a-SLRs for sensing applications.