中国物理B ›› 2025, Vol. 34 ›› Issue (6): 66104-066104.doi: 10.1088/1674-1056/adc409

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Improved temperature localization by hollowing plasmonic nanofocusing cones

Jiaming Zhang(张家明)1,2,† and Jinglai Duan(段敬来)1,2,3,‡   

  1. 1 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
    2 School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516000, China
  • 收稿日期:2025-02-06 修回日期:2025-03-16 接受日期:2025-03-24 出版日期:2025-05-16 发布日期:2025-05-27
  • 通讯作者: Jiaming Zhang, Jinglai Duan E-mail:zhangjiaming@impcas.ac.cn;j.duan@impcas.ac.cn
  • 基金资助:
    Project supported by the Science and Technology Department of Gansu Province, China (Grant No. 24RCKB011) and the National Natural Science Foundation of China (Grant No. 12325511).

Improved temperature localization by hollowing plasmonic nanofocusing cones

Jiaming Zhang(张家明)1,2,† and Jinglai Duan(段敬来)1,2,3,‡   

  1. 1 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
    2 School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Advanced Energy Science and Technology Guangdong Laboratory, Huizhou 516000, China
  • Received:2025-02-06 Revised:2025-03-16 Accepted:2025-03-24 Online:2025-05-16 Published:2025-05-27
  • Contact: Jiaming Zhang, Jinglai Duan E-mail:zhangjiaming@impcas.ac.cn;j.duan@impcas.ac.cn
  • Supported by:
    Project supported by the Science and Technology Department of Gansu Province, China (Grant No. 24RCKB011) and the National Natural Science Foundation of China (Grant No. 12325511).

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摘要： The utilization of nanostructures with diverse geometric shapes is essential for manipulating the energy of electromagnetic (EM) fields and achieving various applications in optics, such as nanofocusing. The plasmonic cone structure is highly representative in the field of nanofocusing applications, effectively guiding EM field energy to the tip of the cone and resulting in high local electric field and temperature effects. In certain chemical catalytic applications, an elevated temperature and a larger surface area may be required to enhance catalysis reactions. Here, we propose a hollow gold nanocone structure that can achieve higher temperature both at the tip and within its hollow region under the excitation of an EM field. Through rigorous finite element method (FEM) simulations, we investigated the EM field and temperature distribution of the hollow cone at various cone angles and identified those angles that yield higher local temperatures. Additionally, the analysis of the scattering cross section of hollow cones reveals that the presence of electric dipole component of the EM field corresponds to Fabry-Perot-like (FP-like) resonance in short wavelengths (600 nm-1200 nm), which predominantly contributes to the temperature localization. These findings provide novel insights into utilizing conical nanostructures for applications such as catalysis.

关键词: nanofocusing, hollow nanocone, temperature localization

Abstract: The utilization of nanostructures with diverse geometric shapes is essential for manipulating the energy of electromagnetic (EM) fields and achieving various applications in optics, such as nanofocusing. The plasmonic cone structure is highly representative in the field of nanofocusing applications, effectively guiding EM field energy to the tip of the cone and resulting in high local electric field and temperature effects. In certain chemical catalytic applications, an elevated temperature and a larger surface area may be required to enhance catalysis reactions. Here, we propose a hollow gold nanocone structure that can achieve higher temperature both at the tip and within its hollow region under the excitation of an EM field. Through rigorous finite element method (FEM) simulations, we investigated the EM field and temperature distribution of the hollow cone at various cone angles and identified those angles that yield higher local temperatures. Additionally, the analysis of the scattering cross section of hollow cones reveals that the presence of electric dipole component of the EM field corresponds to Fabry-Perot-like (FP-like) resonance in short wavelengths (600 nm-1200 nm), which predominantly contributes to the temperature localization. These findings provide novel insights into utilizing conical nanostructures for applications such as catalysis.

Key words: nanofocusing, hollow nanocone, temperature localization

中图分类号:  (Structure of nanoscale materials)

  • 61.46.-w
73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)) 78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)