File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

민승규

Min, Seung Kyu
Theoretical/Computational Chemistry Group for Excited State Phenomena
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Near-field focusing and magnification through self-assembled nanoscale spherical lenses

Author(s)
Lee, Ju YoungHong, Byung HeeKim, Woo YounMin, Seung KyuKim, YukyungJouravlev, Mikhail V.Bose, RanojoyKim, Keun SooHwang, In-ChulKaufman, Laura J.Wong, Chee WeiKim, PhilipKim, Kwang S.
Issued Date
2009-07
DOI
10.1038/nature08173
URI
https://scholarworks.unist.ac.kr/handle/201301/16541
Fulltext
http://www.nature.com/nature/journal/v460/n7254/full/nature08173.html
Citation
NATURE, v.460, no.7254, pp.498 - 501
Abstract
It is well known that a lens-based far-field optical microscope cannot resolve two objects beyond Abbe's diffraction limit. Recently, it has been demonstrated that this limit can be overcome by lensing effects driven by surface-plasmon excitation(1-3), and by fluorescence microscopy driven by molecular excitation(4). However, the resolution obtained using geometrical lens-based optics without such excitation schemes remains limited by Abbe's law even when using the immersion technique(5), which enhances the resolution by increasing the refractive indices of immersion liquids. As for submicrometre-scale or nanoscale objects, standard geometrical optics fails for visible light because the interactions of such objects with light waves are described inevitably by near-field optics(6). Here we report near-field high resolution by nanoscale spherical lenses that are self-assembled by bottom-up integration(7) of organic molecules. These nano-lenses, in contrast to geometrical optics lenses, exhibit curvilinear trajectories of light, resulting in remarkably short near-field focal lengths. This in turn results in near-field magnification that is able to resolve features beyond the diffraction limit. Such spherical nanolenses provide new pathways for lens-based near-field focusing and high-resolution optical imaging at very low intensities, which are useful for bio-imaging, near-field lithography, optical memory storage, light harvesting, spectral signal enhancing, and optical nano-sensing.
Publisher
NATURE PUBLISHING GROUP
ISSN
0028-0836

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.