Enhancing the emission from trilayer spintronic terahertz emitters by Cu alloying

Charlotte Bull; Ruidong Ji; Thomas Gething; Ben Spencer; Thomas Thomson; Darren Graham; Paul Nutter

doi:10.1063/9.0001020

Enhancing the emission from trilayer spintronic terahertz emitters by Cu alloying

Charlotte Bull
, Ruidong Ji
, Thomas Gething
, Ben Spencer
, Thomas Thomson
, Darren Graham
, Paul Nutter^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Recent interest in spintonic terahertz (THz) emitters has been driven by their simplicity, low cost and ability to generate high electric field amplitudes over a broad, gapless spectral bandwidth. Here we report on strategies to optimize the amplitude of THz electric fields from spintronic emitters. Specifically, we explore the effect of Cu alloying on the emission from trilayer, W/CoFeB/Pt, emitters. By introducing Cu into both the W and Pt layers we show a significant increase in emission of ∼27% compared to a trilayer without Cu, and an increase of ∼61% compared to a CoFeB/Pt bilayer emitter. These results demonstrate significant potential for improved THz emission by optimizing the metallic layer via alloying with Cu.

Original language	English
Article number	025341
Journal	AIP Advances
Volume	16
DOIs	https://doi.org/10.1063/9.0001020
Publication status	Published - 23 Feb 2026

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title = "Enhancing the emission from trilayer spintronic terahertz emitters by Cu alloying",

abstract = "Recent interest in spintonic terahertz (THz) emitters has been driven by their simplicity, low cost and ability to generate high electric field amplitudes over a broad, gapless spectral bandwidth. Here we report on strategies to optimize the amplitude of THz electric fields from spintronic emitters. Specifically, we explore the effect of Cu alloying on the emission from trilayer, W/CoFeB/Pt, emitters. By introducing Cu into both the W and Pt layers we show a significant increase in emission of ∼27\% compared to a trilayer without Cu, and an increase of ∼61\% compared to a CoFeB/Pt bilayer emitter. These results demonstrate significant potential for improved THz emission by optimizing the metallic layer via alloying with Cu.",

author = "Charlotte Bull and Ruidong Ji and Thomas Gething and Ben Spencer and Thomas Thomson and Darren Graham and Paul Nutter",

year = "2026",

month = feb,

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doi = "10.1063/9.0001020",

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journal = "AIP Advances",

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TY - JOUR

T1 - Enhancing the emission from trilayer spintronic terahertz emitters by Cu alloying

AU - Bull, Charlotte

AU - Ji, Ruidong

AU - Gething, Thomas

AU - Spencer, Ben

AU - Thomson, Thomas

AU - Graham, Darren

AU - Nutter, Paul

PY - 2026/2/23

Y1 - 2026/2/23

N2 - Recent interest in spintonic terahertz (THz) emitters has been driven by their simplicity, low cost and ability to generate high electric field amplitudes over a broad, gapless spectral bandwidth. Here we report on strategies to optimize the amplitude of THz electric fields from spintronic emitters. Specifically, we explore the effect of Cu alloying on the emission from trilayer, W/CoFeB/Pt, emitters. By introducing Cu into both the W and Pt layers we show a significant increase in emission of ∼27% compared to a trilayer without Cu, and an increase of ∼61% compared to a CoFeB/Pt bilayer emitter. These results demonstrate significant potential for improved THz emission by optimizing the metallic layer via alloying with Cu.

AB - Recent interest in spintonic terahertz (THz) emitters has been driven by their simplicity, low cost and ability to generate high electric field amplitudes over a broad, gapless spectral bandwidth. Here we report on strategies to optimize the amplitude of THz electric fields from spintronic emitters. Specifically, we explore the effect of Cu alloying on the emission from trilayer, W/CoFeB/Pt, emitters. By introducing Cu into both the W and Pt layers we show a significant increase in emission of ∼27% compared to a trilayer without Cu, and an increase of ∼61% compared to a CoFeB/Pt bilayer emitter. These results demonstrate significant potential for improved THz emission by optimizing the metallic layer via alloying with Cu.

U2 - 10.1063/9.0001020

DO - 10.1063/9.0001020

M3 - Article

SN - 2158-3226

VL - 16

JO - AIP Advances

JF - AIP Advances

M1 - 025341

ER -

Enhancing the emission from trilayer spintronic terahertz emitters by Cu alloying

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