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Measurement of a Saturated Emission of Optical Radiation from Gold Nanoparticles: Application to an Ultrahigh Resolution Microscope

Shi-Wei Chu, Tung-Yu Su, Ryosuke Oketani, Yen-Ta Huang, Hsueh-Yu Wu, Yasuo Yonemaru, Masahito Yamanaka, Hsuan Lee, Guan-Yu Zhuo, Ming-Ying Lee, Satoshi Kawata, and Katsumasa Fujita
Phys. Rev. Lett. 112, 017402 – Published 7 January 2014
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Abstract

We show that scattering from a single gold nanoparticle is saturable for the first time. Wavelength-dependent study reveals that the saturation behavior is governed by depletion of surface plasmon resonance, not the thermal effect. We observed interesting flattening of the point spread function of scattering from a single nanoparticle due to saturation. By extracting the saturated part of scattering via temporal modulation, we achieve λ/8 point spread function in far-field imaging with unambiguous separation of adjacent particles.

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  • Received 24 May 2013

DOI:https://doi.org/10.1103/PhysRevLett.112.017402

© 2014 American Physical Society

Synopsis

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Better than Diffraction

Published 7 January 2014

A new microscopy method allows the imaging of nanostructures that are smaller than one eighth of the wavelength of the light used to illuminate them.

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Authors & Affiliations

Shi-Wei Chu1,2,*, Tung-Yu Su1, Ryosuke Oketani3, Yen-Ta Huang1, Hsueh-Yu Wu1, Yasuo Yonemaru3, Masahito Yamanaka3, Hsuan Lee1, Guan-Yu Zhuo1, Ming-Ying Lee1, Satoshi Kawata3, and Katsumasa Fujita3

  • 1Department of Physics, National Taiwan University, Taipei 10617, Taiwan, Republic of China
  • 2Molecular Imaging Center, National Taiwan University, Taipei 10617, Taiwan, Republic of China
  • 3Department of Applied Physics, Osaka University, 565-0871 Osaka, Japan

  • *Corresponding author. swchu@phys.ntu.edu.tw

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Issue

Vol. 112, Iss. 1 — 10 January 2014

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