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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

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  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 3 — Feb. 29, 2012

Enhanced resolution in subsurface near-field optical microscopy

Roman Krutokhvostov, Alexander A. Govyadinov, Johannes M. Stiegler, Florian Huth, Andrey Chuvilin, P. Scott Carney, and Rainer Hillenbrand  »View Author Affiliations


Optics Express, Vol. 20, Issue 1, pp. 593-600 (2012)
http://dx.doi.org/10.1364/OE.20.000593


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Abstract

We report an experimental analysis of the capabilities of scattering-type scanning near-field optical microscopy for mapping sub-surface features at varying depths. For the first time, we demonstrate experimentally that both the spatial resolution and depth contrast can be improved in subsurface microscopy by demodulating the measured near-field signal at higher harmonics of the probe’s tapping frequency and by operating at smaller tapping amplitudes. Our findings are qualitatively supported by a simple dipole model.

© 2011 OSA

OCIS Codes
(110.3080) Imaging systems : Infrared imaging
(180.4243) Microscopy : Near-field microscopy

ToC Category:
Microscopy

History
Original Manuscript: November 2, 2011
Revised Manuscript: December 7, 2011
Manuscript Accepted: December 9, 2011
Published: December 22, 2011

Virtual Issues
Vol. 7, Iss. 3 Virtual Journal for Biomedical Optics

Citation
Roman Krutokhvostov, Alexander A. Govyadinov, Johannes M. Stiegler, Florian Huth, Andrey Chuvilin, P. Scott Carney, and Rainer Hillenbrand, "Enhanced resolution in subsurface near-field optical microscopy," Opt. Express 20, 593-600 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-20-1-593


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