Tip-enhanced optical spectroscopy

Spectroscopic methods with high spatial resolution are essential for understanding the physical and chemical properties of nanoscale materials including biological proteins, quantum structures and nanocomposite materials. In this paper, we describe microscopic techniques which rely on the enhanced e...

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Bibliographic Details
Published in:Philosophical transactions of the Royal Society of London. Series A: Mathematical, physical, and engineering sciences physical, and engineering sciences, 2004-04, Vol.362 (1817), p.807-819
Main Authors: Hartschuh, Achim, Beversluis, Michael R., Bouhelier, Alexandre, Novotny, Lukas
Format: Article
Language:English
Subjects:
Electric fields
Fluorescence
Fluorescence Imaging
Imaging
Laser beams
Lasers
Microscopy
Microscopy, Confocal - instrumentation
Microscopy, Confocal - methods
Microscopy, Fluorescence - instrumentation
Microscopy, Fluorescence - methods
Molecules
Nanotechnology - instrumentation
Nanotechnology - methods
Near-Field Optics
Optical microscopy
Raman scattering
Raman Spectroscopy
Second-Harmonic Generation
Spectroscopy
Spectrum Analysis, Raman - instrumentation
Spectrum Analysis, Raman - methods
Transducers
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Summary:Spectroscopic methods with high spatial resolution are essential for understanding the physical and chemical properties of nanoscale materials including biological proteins, quantum structures and nanocomposite materials. In this paper, we describe microscopic techniques which rely on the enhanced electric field near a sharp, laser-irradiated metal tip. This confined light-source can be used for the excitation of various optical interactions such as two-photon excited fluorescence or Raman scattering. We study the properties of the enhanced fields and demonstrate fluorescence and Raman imaging with sub-20 nm resolution.
ISSN:1364-503X
1471-2962
DOI:10.1098/rsta.2003.1348