Optimization of terahertz emission from spintronic Fe/Pt hetero-structures

Masahiko Tani; Miezel Talara; Dmitry Bulgarevich; Valynn  K. Mag-usara; Mary C. Escaño; Hideaki Kitahara; Takashi Furuya; Makoto Nakajima; Makoto Watanabe; Garik Torosyan; René Beigang

doi:10.1117/12.2681756

6 October 2023 Optimization of terahertz emission from spintronic Fe/Pt hetero-structures

Masahiko Tani, Miezel Talara, Dmitry Bulgarevich, Valynn K. Mag-usara, Mary C. Escaño, Hideaki Kitahara, Takashi Furuya, Makoto Nakajima, Makoto Watanabe, Garik Torosyan, René Beigang

Author Affiliations +

Proceedings Volume PC12683, Terahertz Emitters, Receivers, and Applications XIV; PC1268302 (2023) https://doi.org/10.1117/12.2681756
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

In this paper, the authors discuss the optimization of the Fe(FM-layer)/Pt(NM-layer) for efficient THz emission considering the following points: the FM and NM layer thickness, the optical pump wavelength, the choice of the substrate, and the out-coupling efficiency to the free-space. To improve the out-coupling efficiency, we introduce antenna structures with various shape. It has been demonstrated that a well-designed antenna structure can enhance the THz emission efficiency by several times. In addition, the authors will report a magnetic-field bias modulation, with which the signal detection efficiency can be almost doubled.

Conference Presentation

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Masahiko Tani, Miezel Talara, Dmitry Bulgarevich, Valynn K. Mag-usara, Mary C. Escaño, Hideaki Kitahara, Takashi Furuya, Makoto Nakajima, Makoto Watanabe, Garik Torosyan, and René Beigang "Optimization of terahertz emission from spintronic Fe/Pt hetero-structures", Proc. SPIE PC12683, Terahertz Emitters, Receivers, and Applications XIV, PC1268302 (6 October 2023); https://doi.org/10.1117/12.2681756

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