Cavity enhancement of the magneto-optic Kerr effect for optical studies of magnetic nanostructures | Zendy

Naser Qureshi | Zendy; Holger Schmidt | Zendy; Aaron R. Hawkins | Zendy

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Cavity enhancement of the magneto-optic Kerr effect for optical studies of magnetic nanostructures

Author(s) -

Naser Qureshi,

Holger Schmidt,

Aaron R. Hawkins

Publication year - 2004

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1774276

Subject(s) - kerr effect , nanomagnet , magneto optic kerr effect , dielectric , materials science , condensed matter physics , optics , physics , optoelectronics , magnetization , magnetic field , quantum mechanics , nonlinear system

We present a study of cavity enhancement of the magneto-optic Kerr effect using dielectric multilayers in order to facilitate optical studies of individual single-domain nanomagnets. We develop a transfer matrix theory to analyze Kerr rotation from an arbitrary number of possibly lossy dielectric layers. The combination of one lossless and one thin metallic layer is found to be most favorable for studying individual nanomagnets, providing the best tradeoff between signal enhancement and spatial resolution. Accounting for the microscopic surface structure, we find good agreement between theory and experiment. Using this technique, we demonstrate Kerr enhancements by a factor of more than 16.

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