Recently magneto-optic spatial light modulators (MOSLMs) using magnetic garnet materials have advantages of high
switching speed. However, these materials are difficult to be used in short wavelength range, so that it appears huge light
absorption by magneto optic effect of transmittance mode (Faraday effect). This problem can be solved by using the
materials of metal magnetic films for magneto optic effect of reflection mode (Kerr effect). We suggest the new method,
which is the switching of pixels by heating the pixels with semiconductor laser until Curie temperature and changing the
direction of the driving current at the same time, for developing high speed MOSLM in broadband using amorphous
TbFe films. TbFe films were fabricated by RF sputtering using the Tb21Fe79target, and we have confirmed Kerr rotation
(over 0.4 degree from 400nm to 800 in wavelength), the curie temperature (130 degree Celsius), and the switching of
pixels of 16μm × 16µm by heating the pixels with semiconductor laser and controlling magnetization from external bias
magnetic field (15Oe) and driving current (20mA) of coil at 403, 532 and 633nm wavelength.
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