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Projects / Programmes source: ARIS

Controllable broadband electromagnetic-radiation shielding

Research activity

Code Science Field Subfield
2.21.00  Engineering sciences and technologies  Technology driven physics   

Code Science Field
1.03  Natural Sciences  Physical sciences 
Keywords
electromagnetic radiation, absorption, active protection, broadband frequency range
Evaluation (rules)
source: COBISS
Points
2,491.45
A''
585.49
A'
1,083.7
A1/2
1,977.95
CI10
6,896
CImax
243
h10
41
A1
9.06
A3
7.93
Data for the last 5 years (citations for the last 10 years) on March 3, 2024; A3 for period 2018-2022
Data for ARIS tenders ( 04.04.2019 – Programme tender, archive )
Database Linked records Citations Pure citations Average pure citations
WoS  381  8,718  7,664  20.12 
Scopus  385  9,390  8,312  21.59 
Researchers (9)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  18271  PhD Miha Čekada  Materials science and technology  Researcher  2020 - 2024  436 
2.  15601  Jožko Fišer    Technical associate  2020 - 2024  12 
3.  39140  PhD Nejc Janša  Physics  Junior researcher  2020 - 2021  12 
4.  20209  PhD Martin Klanjšek  Physics  Researcher  2020 - 2024  193 
5.  26463  PhD Matjaž Panjan  Electronic components and technologies  Researcher  2020 - 2024  215 
6.  26465  PhD Matej Pregelj  Physics  Head  2020 - 2024  130 
7.  33800  Petra Šutar    Technical associate  2022 - 2024  66 
8.  52148  MSc Yevhenii Vaskivskyi  Physics  Researcher  2022 - 2024  48 
9.  21558  PhD Andrej Zorko  Physics  Researcher  2020 - 2024  290 
Organisations (1)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  90,038 
Abstract
Background: The electromagnetic (EM) radiation emitted from man-made sources is becoming increasingly disturbing, as the number of electronic devices is exceedingly growing. The corresponding EM spectrum spreads from several kHz, e.g., naval communication, up to hundreds of GHz, used in satellite communication. Moreover, while the integrated circuits are becoming denser and, hereby, stronger sources of EM radiation, their small dimensions make them increasingly vulnerable to the intrusive EM radiation. In the majority of cases disturbing EM radiation can be avoided with the use of the EM radiation shielding that assures a permanent EM-radiation protection. However, when the need for high sensitivity and strong radiation alternates, e.g., in a transmitting/receiving mode of a cell phone or in surveillance and sensing applications, a possibility to control the shielding effectiveness would be highly appreciated. Objectives: Here we propose a development of a broadband (kHz-THz) EM-radiation shielding that can be activated on demand. The originality of the proposal is to exploit the remarkable absorption properties of the magnetic multilayers. The breakthrough is to introduce an external control of the EM-radiation absorption in the surface coating, which is currently unavailable. In particular, our recent discovery showed that a type of magnetic single crystals – the so-called layered metamagnets – in the applied magnetic field absorb EM radiation in an extremely wide frequency range, i.e., between 1 kHz and 500 GHz at 30 K. Considering the high level of the multilayer-growth technology, progress beyond state-of-the-art should be possible by synthesis of artificial metamagnets that mimic the response of a single crystal already at room temperature. Most importantly, this approach allows for a high degree of tunability; for instance, tuning of the interlayer coupling sets the strength of the magnetic field required to switch-on the absorbing phase. As a result, the desired EM-radiation absorption could be achieved at exactly determined temperature and magnetic fields. Approach: Our project consists of three stages. In the first stage, we will optimize the synthesis of the metamagnetic multilayers by tuning the material and thickness parameters, in order to achieve a broadband EM-radiation absorption at room temperature. In the second stage, we will explore the corresponding magnetic phase diagram and excitations as a function of the magnetic field, which will allow us to identify and explain the main absorbing mechanisms. Finally, we will produce a prototype of an active EM-radiation shielding composed of metamagnetic multilayers deposited on a surface coil array that will enable switching between the absorbing and non-absorbing magnetic states. Impact: Active control of the EM-radiation absorption will open a completely new field of applications, which include shielding from radiation sources, protection of sensitive electronics and advanced stealth technologies. In a broader picture, it can be foreseen that other research directions may arise, such as development of sophisticated filtering coatings with tuneable frequency range and adaptive surface area.
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