Investigations of the transmission and reflection spectra of THz radiation of magnetic metallic nanowires

L. A. Fomin; V. G. Krishtop; E. S. Zhukova; S. S. Zhukov; D. L. Zagorsky; I. M. Doludenko; S. G. Chigarev; E. A. Vilkov; A. I. Panas

doi:10.1117/12.2623795

30 January 2022 Investigations of the transmission and reflection spectra of THz radiation of magnetic metallic nanowires

L. A. Fomin, V. G. Krishtop, E. S. Zhukova, S. S. Zhukov, D. L. Zagorsky, I. M. Doludenko, S. G. Chigarev, E. A. Vilkov, A. I. Panas

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Proceedings Volume 12157, International Conference on Micro- and Nano-Electronics 2021; 1215706 (2022) https://doi.org/10.1117/12.2623795
Event: International Conference on Micro- and Nano-Electronics 2021, 2021, Zvenigorod, Russian Federation

Abstract

The transmission and reflection spectra of arrays of heterogeneous nanowires made of Ni/Co, FeNi/Co, and Ni/Fe, formed in track polymer membranes by the galvanic method, have been studied in the frequency range from 16 to 250 THz. Many peaks in the 16-20 THz range were found in the transmission spectra, while they are not observed in the spectrum of a track membrane without nanowires. The absorption spectra of an array of nanowires in a track membrane and a membrane without wires are calculated from the obtained spectra. It was found that the fraction of the THz radiation power absorbed by nanowires and its spectrum depend on the materials of the nanowires. The features of the observed spectra can be explained by two mechanisms. The first is the inverse laser effect in magnetic nanocontacts. And the second is the change in electrical resistance due to spin-flip transitions between the spin subbands in the case of a non-coplanar distribution of the magnetization of the magnetic layers. This class of quasi-one-dimensional structures looks promising for creating THz radiation detectors in a wide spectral range and at room temperature.

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L. A. Fomin, V. G. Krishtop, E. S. Zhukova, S. S. Zhukov, D. L. Zagorsky, I. M. Doludenko, S. G. Chigarev, E. A. Vilkov, and A. I. Panas "Investigations of the transmission and reflection spectra of THz radiation of magnetic metallic nanowires", Proc. SPIE 12157, International Conference on Micro- and Nano-Electronics 2021, 1215706 (30 January 2022); https://doi.org/10.1117/12.2623795

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KEYWORDS

Nanowires

Terahertz radiation

Electrons

Magnetism

Metals

Absorption

Ferromagnetics

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