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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 30, Iss. 18 — Sep. 15, 2005
  • pp: 2388–2390

Local infrared microspectroscopy with subwavelength spatial resolution with an atomic force microscope tip used as a photothermal sensor

A. Dazzi, R. Prazeres, F. Glotin, and J. M. Ortega  »View Author Affiliations


Optics Letters, Vol. 30, Issue 18, pp. 2388-2390 (2005)
http://dx.doi.org/10.1364/OL.30.002388


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Abstract

We describe a new method of infrared microspectroscopy. It is intended for performing chemical mapping of various objects with subwavelength lateral resolution by using the infrared vibrational signature characterizing different molecular species. We use the photothermal expansion effect, detected by an atomic force microscope tip, probing the local transient deformation induced by an infrared pulsed laser tuned at a sample absorbing wavelength. We show that this new tool opens the way for measuring and identifying spectroscopic contrasts not accessible by far-field or near-field optical methods and with a subwavelength lateral resolution.

© 2005 Optical Society of America

OCIS Codes
(110.0180) Imaging systems : Microscopy
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation

Citation
A. Dazzi, R. Prazeres, F. Glotin, and J. M. Ortega, "Local infrared microspectroscopy with subwavelength spatial resolution with an atomic force microscope tip used as a photothermal sensor," Opt. Lett. 30, 2388-2390 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-18-2388

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