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
Original Manuscript: November 21, 1983
Manuscript Accepted: April 27, 1984
Published: August 1, 1984
Yasuo Tomita and Toshihiko Yoshino, "Optimum design of multilayer-medium structures in a magneto-optical readout system," J. Opt. Soc. Am. A 1, 809-817 (1984)