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Terahertz magnetic modulator based on magnetically clustered nanoparticles
journal contribution
posted on 2023-06-21, 06:02 authored by Mostafa Shalaby, Marco Peccianti, Yavuz Ozturk, Ibraheem Al-Naib, Christoph P Hauri, Roberto MorandottiRandom orientation of liquid-suspended magnetic nanoparticles (Ferrofluids) gives rise to a zero net magnetic orientation. An external magnetic field tends to align these nanoparticles into clusters, leading to a strong linear dichroism on a propagating wave. Using 10?nm-sized Fe3O4, we experimentally realize a polarization-sensitive magnetic modulator operating at terahertz wavelengths. We reached a modulation depth of 66% using a field as low as 35?mT. The proposed concept offers a solution towards fundamental terahertz magnetic modulators.
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Publication status
- Published
File Version
- Published version
Journal
Applied Physics LettersISSN
0003-6951Publisher
American Institute of PhysicsExternal DOI
Issue
15Volume
106Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Atomic, Molecular and Optical Physics Research Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-01-17First Open Access (FOA) Date
2017-01-17First Compliant Deposit (FCD) Date
2017-01-17Usage metrics
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