Fabrication of a Three-Dimensional Plasmon Ruler Using an Atomic Force Microscope
Jianing Lu, Shaoding Liu, Sean SE Collins, Linlong Tang, Xingzhan Wei, Paul Mulvaney
JOURNAL OF PHYSICAL CHEMISTRY C | AMER CHEMICAL SOC | Published : 2019
We have assembled a three-dimensional (3D) plasmon ruler using an atomic force microscope (AFM) tip to manipulate single gold nanocrystals on top of electron beam lithography fabricated base layers. The 3D structures exhibit several polarization-dependent surface plasmon scattering peaks, including symmetric and asymmetric Fano resonances. We map these resonances as a function of the degree of asymmetry of the structure. We show that the coupled surface plasmon resonances are extremely sensitive to the position of the upper particle and that the resonances can be engineered and tuned using an AFM tip to move the upper nanocrystal just a few Angstroms.
Related Projects (2)
Awarded by ARC
Awarded by National Science Foundation of China
Awarded by NSFC
Awarded by Natural Science Foundation of Shanxi Province
The authors thank the ARC for support through grants LF11000117, DP160102754, and CE170100026. X.W. acknowledges the support of the National Science Foundation of China (NSFC11574308). S.L. acknowledges the support of NSFC (11874276 and 11574228), the Natural Science Foundation of Shanxi Province (201601D021005), and the San Jin Scholars Program of Shanxi Province.