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Proceedings Paper

Near-field optical magnetometry and magnetic imaging of nanomagnets
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Paper Abstract

We present an all-optical approach to detecting magnetization reversal events in submicron ferromagnetic structures that is non-perturbative and compatible with ultrafast optical techniques. We demonstrate experimentally that structures much smaller than the wavelength of light can be probed using both near-field and far-field laser techniques combined with a cavity Kerr enhancement technique and two different polarimetry methods. Controlled magnetization reversal events are detected in nickel magnets approaching the 100nm scale. This leads to a promising way to measure sub-picosecond dynamics of nanomagnets for fast device applications.

Paper Details

Date Published: 14 February 2005
PDF: 8 pages
Proc. SPIE 5776, Eighth International Symposium on Laser Metrology, (14 February 2005); doi: 10.1117/12.611624
Show Author Affiliations
Naser Qureshi, Univ. of California/Santa Cruz (United States)
Aaron R. Hawkins, Brigham Young Univ. (United States)
Holger Schmidt, Univ. of California/Santa Cruz (United States)


Published in SPIE Proceedings Vol. 5776:
Eighth International Symposium on Laser Metrology
R. Rodriguez-Vera; F. Mendoza-Santoyo, Editor(s)

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