Magnetization rotation-based polarization control of spintronic terahertz emitter

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F22%3A10251549" target="_blank" >RIV/61989100:27360/22:10251549 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27740/22:10251549 RIV/61989100:27640/22:10251549

Výsledek na webu

<a href="https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12502/2663659/Magnetization-rotation-based-polarization-control-of-spintronic-terahertz-emitter/10.1117/12.2663659.short" target="_blank" >https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12502/2663659/Magnetization-rotation-based-polarization-control-of-spintronic-terahertz-emitter/10.1117/12.2663659.short</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2663659" target="_blank" >10.1117/12.2663659</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetization rotation-based polarization control of spintronic terahertz emitter

Popis výsledku v původním jazyce

Recently, the terahertz family of sources increased by newly-developed terahertz spintronic emitter (STE), which competes with the traditional in many ways. This 30THz-broadband gapless source is versatile due to its low-cost, easy implementation, frequency-independent excitation, and perpendicularly-given polarization to the STE&apos;s magnetization. Nowadays, the polarization control of STEs was demonstrated by rotating and multipolar magnets, a twisted magnetic field, or cascades of STEs. The methods suffer from mechanical stability, realization difficulties, and limited polarization control. We introduce here our new approach to control the emitted polarization following Stoner-Wohlfarth magnetization rotation within our FeCo/TbCo2/FeCo-based STE exploiting magnetic anisotropy. The varying magnetic field along the hard magnetic axis induces the magnetization rotation, performing the polarization control. We present full-360-degree linear polarization control, not needing mechanically rotating components. This technique guarantees higher stability for polarimetry applications. We prove the whole terahertz spectrum follows the polarization control, preserving even the phase of sub-picosecond terahertz emission. It offers easy polarization calibration of the emitter for terahertz experimental setups. Moreover, we provide models to explain magnetic hysteresis defining the polarization behaviour. We predict that the polarization-controlled STEs will find many applications covering terahertz time-domain polarimetry and ellipsometry, medical imaging and security detection. (C) 2022 SPIE.

Název v anglickém jazyce

Magnetization rotation-based polarization control of spintronic terahertz emitter

Popis výsledku anglicky

Recently, the terahertz family of sources increased by newly-developed terahertz spintronic emitter (STE), which competes with the traditional in many ways. This 30THz-broadband gapless source is versatile due to its low-cost, easy implementation, frequency-independent excitation, and perpendicularly-given polarization to the STE&apos;s magnetization. Nowadays, the polarization control of STEs was demonstrated by rotating and multipolar magnets, a twisted magnetic field, or cascades of STEs. The methods suffer from mechanical stability, realization difficulties, and limited polarization control. We introduce here our new approach to control the emitted polarization following Stoner-Wohlfarth magnetization rotation within our FeCo/TbCo2/FeCo-based STE exploiting magnetic anisotropy. The varying magnetic field along the hard magnetic axis induces the magnetization rotation, performing the polarization control. We present full-360-degree linear polarization control, not needing mechanically rotating components. This technique guarantees higher stability for polarimetry applications. We prove the whole terahertz spectrum follows the polarization control, preserving even the phase of sub-picosecond terahertz emission. It offers easy polarization calibration of the emitter for terahertz experimental setups. Moreover, we provide models to explain magnetic hysteresis defining the polarization behaviour. We predict that the polarization-controlled STEs will find many applications covering terahertz time-domain polarimetry and ellipsometry, medical imaging and security detection. (C) 2022 SPIE.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/EF19_073%2F0016945" target="_blank" >EF19_073/0016945: Doktorská grantová soutěž VŠB - TU Ostrava</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of SPIE - The International Society for Optical Engineering. Volume 12502

ISBN

978-1-5106-6111-0

ISSN

0277-786X

e-ISSN

1996-756X

Počet stran výsledku

5

Strana od-do

—

Název nakladatele

SPIE - The International Society for Optical Engineering

Místo vydání

Bellingham

Místo konání akce

Wojanów

Datum konání akce

6. 9. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000920988700008