Cathodoluminescence as a probe of the optical properties of resonant apertures in a metallic film
Kalpana Singh, Evgeniy Panchenko, Babak Nasr, Amelia Liu, Lukas Wesemann, Timothy J Davis, Ann Roberts
BEILSTEIN JOURNAL OF NANOTECHNOLOGY | BEILSTEIN-INSTITUT | Published : 2018
Here we present the results of an investigation of resonances of azimuthal trimer arrangements of rectangular slots in a gold film on a glass substrate using cathodoluminescence (CL) as a probe. The variation in the CL signal collected from specific locations on the sample as a function of wavelength and the spatial dependence of emission into different wavelength bands provides considerable insight into the resonant modes, particularly sub-radiant modes, of these apertures. By comparing our experimental results with electromagnetic simulations we are able to identify a Fabry-Pérot mode of these cavities as well as resonances associated with the excitation of surface plasmon polaritons on th..View full abstract
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Awarded by Australian Research Council Discovery Projects scheme
This work was performed in part at the Melbourne Centre for Nanofabrication (MCN) in the Victorian Node of the Australian National Fabrication Facility (ANFF). The authors acknowledge the financial support of the Australian Research Council Discovery Projects scheme (DP160100983).