Generalized Method of Images and Reflective Color Generation from Ultrathin Multipole Resonators
Shi-Qiang Li, Wuzhou Song, Ming Ye, Kenneth B Crozier
ACS PHOTONICS | AMER CHEMICAL SOC | Published : 2018
The multipole expansion has found limited applicability for optical dielectric resonators in inhomogeneous environment, such as on the surface of substrates. Here, we generalize the method of images to multipole analysis for light scattering by dielectric nanoparticles on conductive substrates. We present examples illustrating the physical insight provided by our method, including selection rules governing the excitation of the multipoles. We propose and experimentally demonstrate a new mechanism to generate high resolution surface color. The dielectric resonators employed are very thin (less than 50 nm), i.e., similar in thickness to the plasmonic resonators that are currently being investi..View full abstract
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Awarded by Australian Research Council
This work was supported by the Australian Research Council (DP150103736 and FT140100577) and by the Victorian Endowment for Science, Knowledge and Innovation (VESKI). Fabrication work was performed at the Melbourne Centre for Nanofabrication (MCN) in the Victorian Node of the Australian National Fabrication Facility (ANFF). S.Q.L and K.B.C. developed the concept. S.Q.L devised the theory, performed fabrication, experiments, simulation and data analysis. S.Q.L., W.S., M. Y, and K.B.C. discussed the results. S.Q.L. and K.B.C. wrote the manuscript.