| Issue |
Eur. Phys. J. AP
Volume 6, Number 2, May 1999
|
|
|---|---|---|
| Page(s) | 171 - 178 | |
| DOI | https://doi.org/10.1051/epjap:1999168 | |
| Published online | 15 May 1999 | |
https://doi.org/10.1051/epjap:1999168
Detection of an evanescent field scattered by silicon tips in an apertureless scanning near-field optical microscope*
Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Université de
technologie de Troyes,
12 rue Marie Curie, B.P. 2060, 10010 Troyes Cedex, France
Corresponding author: adam@univ-troyes.fr
Received:
20
July
1998
Revised:
11
January
1999
Accepted:
19
February
1999
Published online: 15 May 1999
We describe how a commercial silicon cantilever can be used both as a force probe and a local scatterer of light. This tip can thus be used as the key element of an apertureless Scanning Near-field Optical Microscope (SNOM) combined with an Atomic Force Microscope (AFM). We use a Total Internal Reflection (TIR) illumination to provide a Fresnel evanescent wave with well-defined characteristics. We show how the weak signal issued from the near-field scattered by the tip can be extracted from the background noise. Finally we present how a signal related to the near field can also be obtained when the tip is oscillated at a frequency close to the resonance frequency of the cantilever. These results are compared with a simulation of the lock-in detection. Finally we describe the role of the vibration amplitude on the signal.
PACS: 07.79.Fc – Near-field scanning optical microscopes / 61.16.Ch – Scanning probe microscopy: scanning tunneling, atomic force, scanning optical, magnetic force, etc.
© EDP Sciences, 1999
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