research article
Terahertz magnetic modulator based on magnetically clustered nanoparticles
Random 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.
Type
research article
Web of Science ID
WOS:000344344700008
Author(s)
Shalaby, Mostafa
Peccianti, Marco
Ozturk, Yavuz
Al-Naib, Ibraheem
Morandotti, Roberto
Date Issued
2014
Publisher
Published in
Volume
105
Issue
15
Article Number
151108
Editorial or Peer reviewed
REVIEWED
Written at
EPFL
Available on Infoscience
March 12, 2015
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