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

被引：80

作者：

Chu, Shi-Wei ^{[1
,2
]}

Su, Tung-Yu ^{[1
]}

Oketani, Ryosuke ^{[3
]}

Huang, Yen-Ta ^{[1
]}

Wu, Hsueh-Yu ^{[1
]}

Yonemaru, Yasuo ^{[3
]}

Yamanaka, Masahito ^{[3
]}

Lee, Hsuan ^{[1
]}

Zhuo, Guan-Yu ^{[1
]}

Lee, Ming-Ying ^{[1
]}

Kawata, Satoshi ^{[3
]}

Fujita, Katsumasa ^{[3
]}

机构：

[1] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan

[2] Natl Taiwan Univ, Mol Imaging Ctr, Taipei 10617, Taiwan

[3] Osaka Univ, Dept Appl Phys, Osaka 5650871, Japan

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 01期

基金：

日本学术振兴会;

关键词：

ROOM-TEMPERATURE; ABSORPTION; PLASMONICS; MOLECULES; LIGHT; SHAPE; SIZE;

D O I：

10.1103/PhysRevLett.112.017402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 lambda/8 point spread function in far-field imaging with unambiguous separation of adjacent particles.

引用

页数：5

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