Quantitative and Isolated Measurement of Far-Field Light Scattering by a Single Nanostructure

Donghyeong Kim, Kwang Yong Jeong, Jinhyung Kim, Ho Seok Ee, Ju Hyung Kang, Hong Kyu Park, Min Kyo Seo

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Light scattering by nanostructures has facilitated research on various optical phenomena and applications by interfacing the near fields and free-propagating radiation. However, direct quantitative measurement of far-field scattering by a single nanostructure on the wavelength scale or less is highly challenging. Conventional back-focal-plane imaging covers only a limited solid angle determined by the numerical aperture of the objectives and suffers from optical aberration and distortion. Here, we present a quantitative measurement of the differential far-field scattering cross section of a single nanostructure over the full hemisphere. In goniometer-based far-field scanning with a high signal-to-noise ratio of approximately 27.4 dB, weak scattering signals are efficiently isolated and detected under total-internal-reflection illumination. Systematic measurements reveal that the total and differential scattering cross sections of a Au nanorod are determined by the plasmonic Fabry-Perot resonances and the phase-matching conditions to the free-propagating radiation, respectively. We believe that our angle-resolved far-field measurement scheme provides a way to investigate and evaluate the physical properties and performance of nano-optical materials and phenomena.

Original languageEnglish
Article number054024
JournalPhysical Review Applied
Volume8
Issue number5
DOIs
Publication statusPublished - 2017 Nov 10

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far fields
light scattering
scattering cross sections
goniometers
optical materials
radiation
numerical aperture
hemispheres
phase matching
scattering
nanorods
aberration
near fields
signal to noise ratios
physical properties
illumination
scanning
wavelengths

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Quantitative and Isolated Measurement of Far-Field Light Scattering by a Single Nanostructure. / Kim, Donghyeong; Jeong, Kwang Yong; Kim, Jinhyung; Ee, Ho Seok; Kang, Ju Hyung; Park, Hong Kyu; Seo, Min Kyo.

In: Physical Review Applied, Vol. 8, No. 5, 054024, 10.11.2017.

Research output: Contribution to journalArticle

Kim, Donghyeong ; Jeong, Kwang Yong ; Kim, Jinhyung ; Ee, Ho Seok ; Kang, Ju Hyung ; Park, Hong Kyu ; Seo, Min Kyo. / Quantitative and Isolated Measurement of Far-Field Light Scattering by a Single Nanostructure. In: Physical Review Applied. 2017 ; Vol. 8, No. 5.
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