Magnetization rotation-based polarization control of spintronic terahertz emitter
The result's identifiers
Result code in 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>
Alternative codes found
RIV/61989100:27740/22:10251549 RIV/61989100:27640/22:10251549
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Magnetization rotation-based polarization control of spintronic terahertz emitter
Original language description
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'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.
Czech name
—
Czech description
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Classification
Type
D - Article in proceedings
CEP classification
—
OECD FORD branch
10300 - Physical sciences
Result continuities
Project
<a href="/en/project/EF19_073%2F0016945" target="_blank" >EF19_073/0016945: Doctoral grant competition VŠB - TU Ostrava</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of SPIE - The International Society for Optical Engineering. Volume 12502
ISBN
978-1-5106-6111-0
ISSN
0277-786X
e-ISSN
1996-756X
Number of pages
5
Pages from-to
—
Publisher name
SPIE - The International Society for Optical Engineering
Place of publication
Bellingham
Event location
Wojanów
Event date
Sep 6, 2022
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000920988700008