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Communication Dans Un Congrès Année : 2021

Optimized optical cavity for maximal enhancement of terahertz spintronic emission

Résumé

Spintronic terahertz emitters are recently developed broadband sources for THz applications based on the ultrafast spin-diffusion in ferromagnetic/nonmagnetic ultra-thin multilayers. We present the enhancement of the terahertz emission using the integration of an optimized SiO 2 /TiO 2 photonic crystal combined with our previously reported original architecture of a spintronic emitter with induced magnetic anisotropy. Layer thicknesses of the optical cavity are designed for maximal infrared pump absorption in the ferromagnetic layers to obtain intense terahertz emission. The improvement of the efficiency by factor four of terahertz emission is demonstrated compared to a spintronic emitter integrated with Bragg mirror and standard spintronic emitter.
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Dates et versions

hal-03584675 , version 1 (22-02-2022)

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Pierre Kolejak, Geoffrey Lezier, Kamil Postava, Jean-Francois Lampin, Nicolas Tiercelin, et al.. Optimized optical cavity for maximal enhancement of terahertz spintronic emission. 2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9566885⟩. ⟨hal-03584675⟩
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