Quantitative and Isolated Measurement of Far-Field Light Scattering by a Single Nanostructure
- Authors
- Kim, Donghyeong; Jeong, Kwang-Yong; Kim, Jinhyung; Ee, Ho-Seok; Kang, Ju-Hyung; Park, Hong-Gyu; Seo, Min-Kyo
- Issue Date
- 10-11월-2017
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW APPLIED, v.8, no.5
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW APPLIED
- Volume
- 8
- Number
- 5
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/81557
- DOI
- 10.1103/PhysRevApplied.8.054024
- ISSN
- 2331-7019
- 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.
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Collections - College of Science > Department of Physics > 1. Journal Articles
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