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:	18 Jan 2018 09:43
URI:	http://srodev.sussex.ac.uk/id/eprint/66232

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