[13a-B508-1~10] 3.9 テラヘルツ全般

▲ [13a-B508-9] THz Time-Domain Magneto-Optic On-Chip Sensor/Imager Based on Spintronic THz Emission (II)

〇(D)Miezel Legurpa Talara¹、Dmitry Bulgarevich²、Chiyaka Tachioka¹、Valynn Katrine Mag-usara¹、Hideaki Kitahara³、Makoto Nakajima³、Makoto Watanabe²、Masahiko Tani¹ (1.Res Ctr for Dev of Far-Infrared Region, Univ of Fukui, Japan、2.Res Ctr for Structural Materials, Nat Inst for Mat Sci, Tsukuba, Japan、3.Laser THz Res Div, Inst of Laser Eng, Osaka Univ, Japan)

キーワード：THz spintronics, spintronic antenna, magneto optic imaging

We will present magneto optic imaging (MOI) studies utilizing the THz radiation generated by a diabolo-shaped spintronic Fe/Pt antenna with the use of an on-chip sensor/imager system. We made use of the spintronic heterostructure's sensitivity to a relatively weak magnetic field for magneto-optic imaging. Results showed an improved signal to noise ratio (SNR) when the diabolo-shaped antenna was used as the THz emitter. This can be attributed to the fact that the spintronic antenna is a more efficient THz emitter compared to the plain spintronic heterostructure. However, different contrast of the obtained MOI image of the magnet was observed when using the diabolo-shaped antenna as the THz source. This may be the effect of the antenna structure or the pump beam and antenna alignment.