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  Phonon-enhanced light-matter interaction at the nanometre scale

Hillenbrand, R., Taubner, T., & Keilmann, F. (2002). Phonon-enhanced light-matter interaction at the nanometre scale. Nature, 418(6894), 159-162.

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Genre: Journal Article
Alternative Title : Nature

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 Creators:
Hillenbrand, R.1, Author              
Taubner, T.1, Author              
Keilmann, F.1, Author              
Affiliations:
1Baumeister, Wolfgang / Molecular Structural Biology, Max Planck Institute of Biochemistry, Max Planck Society, ou_1565142              

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 Abstract: Optical near fields exist close to any illuminated object. They account for interesting effects such as enhanced pinhole transmission 1 or enhanced Raman scattering enabling single- molecule spectroscopy(2). Also, they enable high-resolution (below 10 nm) optical microscopy(3-6). The plasmon-enhanced near-field coupling between metallic nanostructures(7-9) opens new ways of designing optical properties(10-12) and of controlling light on the nanometre scale(13,14). Here we study the strong enhancement of optical near-field coupling in the infrared by lattice vibrations (phonons) of polar dielectrics. We combine infrared spectroscopy with a near-field microscope that provides a confined field to probe the local interaction with a SiC sample. The phonon resonance occurs at 920 cm(-1). Within 20 cm(-1) of the resonance, the near-field signal increases 200-fold; on resonance, the signal exceeds by 20 times the value obtained with a gold sample. We find that phonon-enhanced near-field coupling is extremely sensitive to chemical and structural composition of polar samples, permitting nanometre-scale analysis of semiconductors and minerals. The excellent physical and chemical stability of SiC in particular may allow the design of nanometre-scale optical circuits for high-temperature and high-power operation.

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Language(s): eng - English
 Dates: 2002-07-11
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 41846
ISI: 000176710400033
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Title: Nature
  Alternative Title : Nature
Source Genre: Journal
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Pages: - Volume / Issue: 418 (6894) Sequence Number: - Start / End Page: 159 - 162 Identifier: ISSN: 0028-0836