Spintronic terahertz emission of Ni/Pt on GaAs using 1550 nm fiber laser

Authors

Ivan Cedrick Malaluan Verona ⋅ PH National Institute of Physics, University of the Philippines Diliman
John Paul Ferrolino ⋅ PH National Institute of Physics, University of the Philippines Diliman
Alexander De Los Reyes ⋅ PH National Institute of Physics, University of the Philippines Diliman
Hannah Bardolaza ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Neil Irvin Cabello ⋅ PH National Institute of Physics, University of the Philippines Diliman
Armando Somintac ⋅ PH National Institute of Physics, University of the Philippines Diliman
Arnel Salvador ⋅ PH National Institute of Physics, University of the Philippines Diliman
Elmer Estacio ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

Terahertz emission was observed from an Ni/Pt on GaAs spintronic emitter. A Ni layer was deposited on a GaAs substrate and was capped with a thin Pt layer using electron beam deposition. A standard THz-TDS setup was used to obtain the terahertz signal. The excitation source used was a Menlo C-fiber femtosecond fiber laser with 1550 nm and 780 nm output. Reversal of terahertz polarity was observed upon changing magnetic field orientation for the sample under 1550 nm excitation. Terahertz emission was increased under 780 nm excitation but did not exhibit polarity reversal with respect to magnetic field orientation change.

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Issue

2020: Proceedings of the 38th Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2020-2F-03

Section

Condensed Matter Physics and Materials Science

Published

2020-10-19

How to Cite

[1]

ICM Verona, JP Ferrolino, A De Los Reyes, H Bardolaza, NI Cabello, A Somintac, A Salvador, and E Estacio, Spintronic terahertz emission of Ni/Pt on GaAs using 1550 nm fiber laser, Proceedings of the Samahang Pisika ng Pilipinas 38, SPP-2020-2F-03 (2020). URL: https://proceedings.spp-online.org/article/view/SPP-2020-2F-03.