Terahertz magnetic modulator based on magnetically clustered nanoparticles

Shalaby, Mostafa, Peccianti, Marco, Ozturk, Yavuz, Al-Naib, Ibraheem, Hauri, Christoph P and Morandotti, Roberto (2014) Terahertz magnetic modulator based on magnetically clustered nanoparticles. Applied Physics Letters, 106 (15). ISSN 0003-6951

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Abstract

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.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Atomic, Molecular and Optical Physics Research Group
Subjects: Q Science > QC Physics > QC0350 Optics. Light
T Technology > TA Engineering (General). Civil engineering (General) > TA1501 Applied optics. Photonics
Depositing User: Marco Peccianti
Date Deposited: 17 Jan 2017 10:59
Last Modified: 14 Mar 2017 05:04
URI: http://sro.sussex.ac.uk/id/eprint/66232

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