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Journal of Nanophotonics

Magnetic quenching of photonic activity in Fe3O4-elastomer composite
Author(s): Danhao Ma; Dustin T. Hess; Pralav P. Shetty; Kofi W. Adu; Richard C. Bell; Mauricio Terrones
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Paper Abstract

We report a quenching phenomenon within the visible region of the electromagnetic spectrum in the photonic response of a passive Fe3O4-silicone elastomer composite film due to magnetically aligned Fe3O4 nanoparticles. We performed systematic studies of the polarization dependence, the effect of particle size, and an in- and out-of-plane particle alignment on the optical response of the Fe3O4-silicone elastomer composites using a UV/vis/NIR spectrometer. We observed systematic redshifts in the response of the out-of-plane composite films with increasing particle alignment and weight that are attributed to dipole-induced effects. There were no observable shifts in the spectra of the in-plane films, suggesting the orientation of the magnetic dipole and the induced electric dipole play a crucial role in the optical response. A dramatic suppression to near quenching of the photonic response occurred in films containing moderate concentrations of the aligned nanoparticles. This is attributed to the interplay between the intra- and the interparticle dipoles. This occurred even when low magnetic fields were used during the curing process, suggesting that particle alignment and particle size limitation are critical in the manipulation of the photonic properties. A dipole approximation model is used to explain the quenching phenomenon. An active system of such a composite has a potential application in magneto-optic switches.

Paper Details

Date Published: 18 March 2016
PDF: 10 pages
J. Nanophoton. 10(1) 016017 doi: 10.1117/1.JNP.10.016017
Published in: Journal of Nanophotonics Volume 10, Issue 1
Show Author Affiliations
Danhao Ma, The Pennsylvania State Univ. (United States)
Dustin T. Hess, The Pennsylvania State Univ. (United States)
Pralav P. Shetty, The Pennsylvania State Univ. (United States)
Kofi W. Adu, Penn State Altoona (United States)
Richard C. Bell, Penn State Altoona (United States)
Mauricio Terrones, The Pennsylvania State Univ. (United States)

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