META 2021, META'12

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Revealing Plasmonic Gap Modes in Particle-on-Film Systems Using Dark-Field Spectroscopy
D. Y. Lei, A. I. Fernandez-Dominguez, Y. Sonnefraud, K. Appavoo, R. F. Haglund Jr., J. B. Pendry, S. A. Maier

Last modified: 2018-02-28


Polarization-controlled excitation of plasmonic modes in nanometric Au particle-on-film gaps is investigated experimentally using single-particle dark-field spectroscopy. Two distinct geometries are explored: nanospheres on top of and inserted in a thin gold film. Numerical simulations are performed to reveal the physical origin of the observed scattering peaks measured from individual nanospheres in these two configurations.


Plasmonic Gap Modes; Particle-Film Systems; Dark-Field Nanospectroscopy