Optical and magneto-optical properties of gold core cobalt shell magnetoplasmonic nanowire arrays.
Optical and magneto-optical properties of gold core cobalt shell magnetoplasmonic nanowire arrays.
复制标题
金核钴壳磁等离子体纳米线阵列的光学和磁光特性。
作者:
Toal B
In this work we present core–shell nanowire arrays of gold coated with a nanometric layer of cobalt. Despite the extremely small Co volume, these core–shell nanowires display large magneto-optical activity and plasmonic resonance determined by the geometry of the structure. Therefore, we are able to tune both the plasmonic and magneto-optical response in the visible range. Through optical and ellipsometric measurements in transmission, and applying a magnetic field to the sample, it is possible to modulate the value of the phase angle (Del {Δ}) between the S and P polarised components. It was found that the core–shell sample produced an order of magnitude larger variation in Del with changing magnetic field direction, compared with hollow cobalt tubes. The enhancement of magneto optical properties through the plasmonic nature of the gold core is complemented with the ability to induce magnetic influence over optical properties via an externally applied field. Moreover, we demonstrate for the first time the ability to use the remanent magnetisation of the Co, in conjunction with the optical properties defined by the Au, to observe remanent optical states in this uniquely designed structure. This new class of magnetoplasmonic metamaterial has great potential in a wide range of applications, from bio-sensing to data storage due to the tuneable nature of multiple resonance modes and dual functionality.
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DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
G. Weick;D. Weinmann
通讯作者:
D. Weinmann
影响因子:
4
作者:
Murphy A
通讯作者:
Murphy A
影响因子:
29.4
作者:
Carlos Banthi, Juan;Meneses-Rodriguez, David;Armelles, Gaspar
通讯作者:
Armelles, Gaspar
影响因子:
2.3
作者:
Toal B
通讯作者:
Toal B
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
S. Chérif;Y. Roussigné;A. Stashkevich;M. Darques;K. Bouziane;L. Piraux
通讯作者:
L. Piraux