Abstract

An explicit formula for the normal-incidence polar Kerr magneto-optical coefficient in a general multilayer structure consisting of a magnetic film and multilayers has been derived. The optimum condition of the multilayer-medium structure for maximizing the signal-to-noise ratio in the readout system is analytically derived by means of an equivalent bilayer treatment. For the case of the quarter-wave multilayer structure, numerical examples are given. It is shown that the optimization of both the multilayer structure and the readout optical components can greatly increase the signal-to-noise ratio in the readout system.

© 1984 Optical Society of America

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