[11a-PA2-1~17] 3.2 Equipment optics and materials

[11a-PA2-8] Magneto-optical Cavity Effect on Magnetic Stacked Films for Chemical Sensors

〇Haruki Yamane¹, Shingo Takahashi¹, Kiyoshi Yamakawa¹, Koki Takahashi², Nobuya Seko², Ken Sumiyoshi², Koji Shigemura², Satoshi Miura² (1.Akita Ind. Tech., 2.Tianma Japan)

Keywords:magneto-optical, chemical sensot, magnetic stacked film

The improvement of magneto-optical (MO) effects has been extensively studied, because large MO activities are desirable in practical applications, such as telecommunication, recording media, and chemical and biological sensors. Perpendicular magnetic multilayers consisting of [surface half mirror/MO interference/total reflection] stacked structures proposed a large MO Kerr effect. The polar Kerr rotation angle of the multilayers is improved as much as several hundred times, in comparison with a conventional single layer film. This MO enhancement based on an optical interference (cavity) effect is sensitive to the surface condition of the samples, and so it is useful for biochemical sensing applications. We have investigated a new type of hydrogen gas sensor using the MO cavity effect.