Optimum excitation wavelength and photon energy threshold for spintronic terahertz emission from Fe/Pt bilayer

Valynn Katrine Mag-Usara, Mary Clare Escaño, Christopher Petoukhoff, Garik Torosyan, Laura Scheuer, Julien Madéo, Jessica Afalla, Miezel L Talara, Joselito E Muldera, Hideaki Kitahara, David R Bacon, Makoto Nakajima, Keshav Dani, Evangelos Th Papaioannou, René Beigang, Masahiko Tani

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Terahertz emission from ferromagnetic/non-magnetic spintronic heterostructures had been demonstrated as pump wavelength-independent. We report, however, the pump wavelength dependence of terahertz emission from an optimized Fe/Pt spintronic bilayer on MgO substrate. Maximum terahertz generation per total pump power was observed in the 1200- to 1800-nm pump wavelength range, and a marked decrease in the terahertz emission efficiency beyond 2500 nm (pump photon energies
Original languageEnglish (US)
Pages (from-to)104615
JournaliScience
Volume25
Issue number7
DOIs
StatePublished - Jun 29 2022

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