TY - JOUR
T1 - Multipole plasmon resonance in gold nanobipyramid
T2 - Effects of tip shape and size
AU - Weng, Guojun
AU - Shen, Xun
AU - Li, Jianjun
AU - Zhu, Jian
AU - Yang, Jun
AU - Zhao, Junwu
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/10/7
Y1 - 2021/10/7
N2 - Gold nanobipyramids (Au NBPs) are thought to have the same localized surface plasmon resonance (LSPR) peaks as gold nanorods but with narrow bandwidths in experimental spectra. However, the actual LSPR of Au NBPs is still confused because of an extra peak always appearing in simulated spectra without definite attribution. In this study, the plasmonic properties of Au NBPs were investigated based on the discrete dipole approximation (DDA). The simulated electric field enhancement confirmed that the extra LSPR peak came from the multipole plasmon resonance of Au NBPs. According to the polarized charges distribution, we defined the multipole plasmon resonance order of the extra LSPR peak as l = 5. Then, the effects of tip shape and size on the multipole plasmon resonance (l = 5) were investigated. The above results will help to understand multipole plasmon resonance in Au NBPs and design the nanobipyramids with fascinating properties.
AB - Gold nanobipyramids (Au NBPs) are thought to have the same localized surface plasmon resonance (LSPR) peaks as gold nanorods but with narrow bandwidths in experimental spectra. However, the actual LSPR of Au NBPs is still confused because of an extra peak always appearing in simulated spectra without definite attribution. In this study, the plasmonic properties of Au NBPs were investigated based on the discrete dipole approximation (DDA). The simulated electric field enhancement confirmed that the extra LSPR peak came from the multipole plasmon resonance of Au NBPs. According to the polarized charges distribution, we defined the multipole plasmon resonance order of the extra LSPR peak as l = 5. Then, the effects of tip shape and size on the multipole plasmon resonance (l = 5) were investigated. The above results will help to understand multipole plasmon resonance in Au NBPs and design the nanobipyramids with fascinating properties.
KW - Discrete dipole approximation
KW - Gold nanobipyramid
KW - Multipole plasmon resonance
KW - Polarized charges
UR - https://www.scopus.com/pages/publications/85111319783
U2 - 10.1016/j.physleta.2021.127577
DO - 10.1016/j.physleta.2021.127577
M3 - 文章
AN - SCOPUS:85111319783
SN - 0375-9601
VL - 412
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
M1 - 127577
ER -