Linear scattering off a dynamically controlled nanosphere-mirror plasmonic antenna on a fiber taper | Zendy

Cheng Chen | Zendy; HuiLiang Li | Zendy; Hua Li | Zendy; Tian Yang | Zendy

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Linear scattering off a dynamically controlled nanosphere-mirror plasmonic antenna on a fiber taper

Author(s) -

Cheng Chen,

HuiLiang Li,

Hua Li,

Tian Yang

Publication year - 2020

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.381773

Subject(s) - optics , materials science , plasmon , surface plasmon resonance , antenna (radio) , surface plasmon , microscope , near field scanning optical microscope , optical fiber , light scattering , scattering , optoelectronics , optical microscope , scanning electron microscope , physics , nanoparticle , nanotechnology , telecommunications , computer science

A quartz-tuning-fork shear-force microscope was used to demonstrate the gap size dependency of the resonance frequency for a nanosphere-mirror plasmonic antenna. The nanosphere was mounted at the end of a fiber taper scanning probe. A semi-transparent silicon film mirror was used to couple evanescent fields from incident light with the plasmonic antenna using an inverted optical microscope. The plasmon resonance spectra were acquired with a 0.4 nm-step gap size tuning resolution, and were confirmed by finite-difference time-domain simulations. The proposed technique provides a dynamic approach to tuning and detecting distance-dependent localized surface plasmon resonance with a sub-nanometer step resolution.

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