Aufbau eines magnetooptischen Rasternahfeldmikroskops im Reflexionsmodus und Test an periodischen Mikrostrukturen und magnetooptischen Speichermedien

Construction of a magneto-optic scanning near-field microscope in reflection mode and test on periodic microstructures and magneto-optic storage media. The scanning near-field optical microscope (SNOM) enhances the diffraction-limited resolution of a conventional microscope. In this work a magneto-optical SNOM, which can measure the Faraday and Kerr rotation of transparent respective opaque samples quantitatively with high spatial resolution, was built. After an introduction into the principles of near-field optics and magneto-optics the experimental set-up of a SNOM is outlined with special emphasis on the properties of near-field light sources. One part of the work is dedicated to the dependence of the optical and magneto-optical signal on the sample topography. It is shown that topographic sample features induce strong artifacts in high-resolution optical and magneto-optical images. A model for simulating these artifacts is presented. Based on these findings the magneto-optical data acquired on magneto-optic storage media and Co/Pt test samples are interpreted. Kerr rotations of 0.4 degrees have been locally resolved in reflection mode. Sub-wavelength-sized magnetic domains have been measured in transmission mode using visible light (lambda = 488 nm).

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

1999

Author dc:creator

• Rosenberger, Andreas

Contributors dc:contributor

• Güntherodt, Gernot

• info:eu-repo/classification/ddc/530
• Physik
• Optisches Nahfeldmikroskop
• Magnetooptik

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

ger

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123751%22

OAI identifier oai:identifier

oai:publications.rwth-aachen.de:62161