Journal
PHYSICAL REVIEW B
Volume 92, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.92.241110
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Funding
- MRSEC program of the NSF [DMR-1121053]
- NSF
- National Science Foundation CAREER award [DMR-1454260]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1454260] Funding Source: National Science Foundation
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Multipolar electromagnetic phenomena in subwavelength resonators are at the heart of metamaterial science and technology. In this Rapid Communication, we demonstrate selective and enhanced coupling to specific multipole resonances via beam engineering. We first derive an analytical method for determining the scattering and absorption of spherical nanoparticles (NPs) that depends only on the local electromagnetic field quantities within an inhomogeneous beam. Using this analytical technique, we demonstrate the ability to drastically manipulate the scattering properties of a spherical NP by varying illumination properties and demonstrate the excitation of a longitudinal quadrupole mode that cannot be accessed with conventional illumination. This work enhances the understanding of fundamental light-matter interactions in metamaterials and lays the foundation for researchers to identify, quantify, and manipulate multipolar light-matter interactions through optical beam engineering.
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