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Near-Field Mapping of Optical Modes on All-Dielectric Silicon Nanodisks

Habteyes, T G; Staude, Isabelle; Chong, Katie; Dominguez, Jason; Decker, Manuel; Brener, Igal; Miroshnichenko, Andrey; Kivshar, Yuri


We measure, for the first time to our knowledge, the near-field amplitudes and phases of localized optical modes of high-index all-dielectric nanoparticles using apertureless near-field optical microscopy. For individual silicon nanodisks, we observe a four-lobed mode pattern and the formation of deep-subwavelength hot-spots. Our numerical calculations of the optical near-fields of the nanodisks in combination with a multipole expansion of the scattered field based on vector spherical harmonics...[Show more]

CollectionsANU Research Publications
Date published: 2014
Type: Journal article
Source: ACS Photonics
DOI: 10.1021/ph500232u


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