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Enhancing the resolution of scanning near-field optical microscopy by a metal tip grown on an aperture probe

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons77974

Frey,  H. G.
Baumeister, Wolfgang / Molecular Structural Biology, Max Planck Institute of Biochemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons78200

Keilmann,  F.
Baumeister, Wolfgang / Molecular Structural Biology, Max Planck Institute of Biochemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons78270

Kriele,  A.
Baumeister, Wolfgang / Molecular Structural Biology, Max Planck Institute of Biochemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons78045

Guckenberger,  R.
Baumeister, Wolfgang / Molecular Structural Biology, Max Planck Institute of Biochemistry, Max Planck Society;

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Citation

Frey, H. G., Keilmann, F., Kriele, A., & Guckenberger, R. (2002). Enhancing the resolution of scanning near-field optical microscopy by a metal tip grown on an aperture probe. Applied Physics Letters, 81(26), 5030-5032.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-6D99-F
Abstract
We show improvement of the optical and topographical resolution of scanning near-field optical microscopy by introducing a "tip-on-aperture" probe, a metallic tip formed on the aperture of a conventional fiber probe. The tip concentrates the light passing through the aperture. Thus the. advantages of aperture and apertureless scanning near-field optical microscopy are combined. Tips are grown by electron beam deposition and then covered with metal. Fluorescent beads are imaged with a resolution down to 25 nm (full width at half maximum) in the optical signal. The near-field appears strongly localized within 5 mn in z direction, thus promising even higher resolution with sharper tips. (C) 2002 American Institute of Physics.