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<p>Based on the time-dependent density functional theory and the free-electron gas model, we mainly explore the plasmons in gold nano-cuboid. With the help of energy absorption spectrum and charge distribution, the evolutions of longitudinal and transverse plasmons are obtained. Our results show that, as the height of gold nano-cuboid increases, the transverse plasmon mode exhibits a blue shift, while the longitudinal plasmon mode undergoes a red shift. The charge distributions of the strongest transverse and longitudinal plasmon modes both exhibit dipole symmetry characteristics. Additionally, when the electron filling approaches half filling, a blue shift is observed in both the transverse and longitudinal plasmon modes. </p>

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Evolution of the Plasmons in Gold Nano-cuboid

  • 期刊论文

  • 发表日期：

    2026年2月26日

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  • Hong-jie Xue,
  • Guo-xin Chen,
  • Reng-lai Wu,
  • Xiao Tian,
  • Xiangcao Li,
  • Fa-cheng Jin,
  • Chuan Zhang,
  • Yi-bin Niu,
  • Wen-rui Duan

摘要

Based on the time-dependent density functional theory and the free-electron gas model, we mainly explore the plasmons in gold nano-cuboid. With the help of energy absorption spectrum and charge distribution, the evolutions of longitudinal and transverse plasmons are obtained. Our results show that, as the height of gold nano-cuboid increases, the transverse plasmon mode exhibits a blue shift, while the longitudinal plasmon mode undergoes a red shift. The charge distributions of the strongest transverse and longitudinal plasmon modes both exhibit dipole symmetry characteristics. Additionally, when the electron filling approaches half filling, a blue shift is observed in both the transverse and longitudinal plasmon modes.