2020年第67回応用物理学会春季学術講演会

講演情報

一般セッション(口頭講演)

3 光・フォトニクス » 3.9 テラヘルツ全般

[13a-B508-1~10] 3.9 テラヘルツ全般

2020年3月13日(金) 09:00 〜 11:35 B508 (2-508)

林 伸一郎(情通機構)、有川 敬(京大)

10:50 〜 11:05

[13a-B508-8] THz Time-Domain Magneto-Optic On-Chip Sensor/Imager Based on Spintronic THz Emission (I)

Dmitry S Bulgarevich1、Yusuke Akamine2、Miezel Talara2、Valynn Mag-usara2、Chiyaka Tachioka2、Hideaki Kitahara2、Hiroyuki Kato2、Masaki Shiihara2、Masahiko Tani2、Makoto Watanabe1 (1.NIMS, Japan、2.FIR-UF, Japan)

キーワード:terahertz emission, magneto-optic imaging, magneto-optic sensor

Although the possibility of external magnetic field distribution mapping using terahertz (THz) emission from semiconductor surfaces was reported, the THz magneto-optic imaging (MOI) was not demonstrated yet. In present work, the different type of THz-MOI with compact magneto-optic sensor from THz-wave spintronic emitter and electro-optic detector wafers sandwiched together and capped with metal mirror is actually realized. The use of bulky THz steering/collection optics is completely eliminated in our MOI. The corresponding image contrast is a convolution of emitter efficiency and detector sensitivity to spintronic layer magnetization vector and magnitude. Potentially, this technique could significantly contribute to the very limited number of reported MOI schemes for non-destructive testing (NDT) applications.