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  4. Infrared Scanning Near-Field Optical Microscopy Below the Diffraction Limit
 
research article

Infrared Scanning Near-Field Optical Microscopy Below the Diffraction Limit

Sanghera, Jasbinder S.
•
Aggarwal, Ishwar D.
•
Cricenti, Antonio
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2008
Ieee Journal Of Selected Topics In Quantum Electronics

Infrared scanning near-field optical microscopy (IR-SNOM) is an extremely powerful analytical instrument since it combines IR spectroscopy's high chemical specificity with SNOM's high spatial resolution. In order to do this in the infrared, specialty chalcogenide glass fibers were fabricated and their ends tapered to generate SNOM probes. The fiber tips were installed in a modified near-field microscope and both inorganic and biological samples illuminated with the tunable output from a free-electron laser located at Vanderbilt University. Both topographical and IR spectral images were simultaneously recorded with a resolution of similar to 50 and similar to 100 nm, respectively. Unique spectroscopic features were identified in all samples, with spectral images exhibiting resolutions of up to lambda/60, or at least 30 times better than the diffraction limited lens-based microscopes. We believe that IR-SNOM can provide a very powerful insight into some of the most important biomedical research topics.

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Type
research article
DOI
10.1109/JSTQE.2008.928166
Web of Science ID

WOS:000260463200010

Author(s)
Sanghera, Jasbinder S.
Aggarwal, Ishwar D.
Cricenti, Antonio
Generosi, Renato
Luce, Marco
Perfetti, Paolo
Margaritondo, Giorgio  
Tolk, Norman H.
Piston, David
Date Issued

2008

Published in
Ieee Journal Of Selected Topics In Quantum Electronics
Volume

14

Start page

1343

End page

1352

Subjects

Infrared fibers

•

spectroscopy

•

tapered fiber tips

•

Free-Electron-Laser

•

Magnetic-Fields

•

Cell-Line

•

Snom

•

Nanospectroscopy

•

Spectroscopy

•

Chemistry

•

Silicon

•

Probes

•

Light

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPRX  
Available on Infoscience
November 30, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/60903
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