[15p-PB01-1~5] 3.8 Terahertz technologies (formerly 3.9)

[15p-PB01-3] Improvement of Detection Efficiency of Terahertz Waves Emitted from Spintronic Emitters using Alternating Magnetic Bias

〇HIDEAKI KITAHARA¹, Katsuyuki Ishii¹, Miezel Talara¹, Takashi Furuya¹, Mary Escano¹, Masahiko Tani¹, Dmitry Bulgarevich², Dongfeng He², Makoto Watanabe² (1.Univ. of Fukui, 2.NIMS)

Keywords:spintronic emitter, magnetic bias modulation

The spintronic emitter in terahertz (THz) region is applied a satulatied magnetic bias on to the emission device at operation. By applying both positive and negative magnetic field at the lock-in detection, the detected signal of THz wave is possible to enhance two times in principle compearing to modulating the pomp beam by an optical chopper. In this study, we develop a antenna mount that can apply alternating magnetic bias for spintronic emission device, and attempt to enhance the detection signal.