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Terahertz magnetic modulator based on magnetically clustered nanoparticles

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posted on 2023-06-21, 06:02 authored by Mostafa Shalaby, Marco Peccianti, Yavuz Ozturk, Ibraheem Al-Naib, Christoph P Hauri, Roberto Morandotti
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.

History

Publication status

  • Published

File Version

  • Published version

Journal

Applied Physics Letters

ISSN

0003-6951

Publisher

American Institute of Physics

Issue

15

Volume

106

Department 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

2017-01-17

First Open Access (FOA) Date

2017-01-17

First Compliant Deposit (FCD) Date

2017-01-17

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