This dataset includes the COMSOL modelling files, raw spectra data, raw MOKE data, and the processed data.The article associated with this dataset is located in ORE at: http://hdl.handle.net/10871/33084This is the dataset used for the Loughran et al. (2018) article "Design and fabrication of plasmonic cavities for magneto-optical sensing" published in AIP Advances.Engineering and Physical Science Research Council (EPSRC) grants EP/1038470/I and EP/1038411/

Amy, A

Barnes, WL

Bowman, RM

Dawson, P

Einsle, JF

Hendren, W

Hendry, E

Hicken, RJ

Keatley, PS

Loughran, THJ

Roth, J

AIP Advances

T. H. J. Loughran

J. Roth

P. S. Keatley

E. Hendry

W. L. Barnes

R. J. Hicken

J. F. Einsle

A. Amy

W. Hendren

R. M. Bowman

P. Dawson

Crossref

Design and fabrication of plasmonic cavities for magneto-optical sensing

The design and fabrication of a novel plasmonic cavity, intended to allow far-field recovery of signals arising from near field magneto-optical interactions, is presented. Finite element modeling is used to describe the interaction between a gold film, containing cross-shaped cavities, with a nearby magnetic under-layer. The modeling revealed strong electric field confinement near the center of the cross structure for certain optical wavelengths, which may be tuned by varying the length of the cross through a range that is compatible with available fabrication techniques. Furthermore, the magneto optical Kerr effect (MOKE) response of the composite structure can be enhanced with respect to that of the bare magnetic film. To confirm these findings, cavities were milled within gold films deposited upon a soluble film, allowing relocation to a ferromagnetic film using a float transfer technique. Cross cavity arrays were fabricated and characterized by optical transmission spectroscopy prior to floating, revealing resonances at optical wavelengths in good agreement with the finite element modeling. Following transfer to the magnetic film, circular test apertures within the gold film yielded clear magneto-optical signals even for diameters within the sub-wavelength regime. However, no magneto-optical signal was observed for the cross cavity arrays, since the FIB milling process was found to produce nanotube structures within the soluble under-layer that adhered to the gold. Further optimization of the fabrication process should allow recovery of magneto-optical signal from cross cavity structures

Loughran, T.H.J.

Roth, J.

Keatley, P.S.

Hendry, E.

Barnes, W.L.

Hicken, R.J.

Einsle, J.F.

Amy, A.

Hendren, W.

Bowman, R.M.

Dawson, P.

Enlighten

English

Open Research Exeter

Design and fabrication of plasmonic cavities for magneto-optical sensing (dataset)

Enlighten: Publications

This is the author accepted manuscript. The final version is available from AIP Publishing via the DOI in this record.The dataset associated with this article is located in ORE at: https://doi.org/10.24378/exe.309The design and fabrication of a novel plasmonic cavity, intended to allow far-field recovery of signals arising from near field magneto-optical interactions, is presented. Finite element modeling is used to describe the interaction between a gold film, containing cross-shaped cavities, with a nearby magnetic under-layer. The modeling revealed strong electric field confinement near the center of the cross structure for certain optical wavelengths, which may be tuned by varying the length of the cross through a range that is compatible with available fabrication techniques. Furthermore, the magneto optical Kerr effect (MOKE) response of the composite structure can be enhanced with respect to that of the bare magnetic film. To confirm these findings, cavities were milled within gold films deposited upon a soluble film, allowing relocation to a ferromagnetic film using a float transfer technique. Cross cavity arrays were fabricated and characterized by optical transmission spectroscopy prior to floating, revealing resonances at optical wavelengths in good agreement with the finite element modeling. Following transfer to the magnetic film, circular test apertures within the gold film yielded clear magneto-optical signals even for diameters within the sub-wavelength regime. However, no magneto-optical signal was observed for the cross cavity arrays, since the FIB milling process was found to produce nanotube structures within the soluble under-layer that adhered to the gold. Further optimization of the fabrication process should allow recovery of magneto-optical signal from cross cavity structures.Financial support from the UK Engineering and Physical Science Research Council (EPSRC) grants EP/1038470/I and EP/1038411/1 is gratefully acknowledged. We also acknowledge the support of Seagate Technology (Ireland) under SOW 00077300.0. RMB contribution to project was supported by the Royal Academy of Engineering under the Research Chairs and Senior Research Fellowships Scheme

Design and fabrication of plasmonic cavities for magneto-optical sensing (article)

Directory of Open Access Journals

The design and fabrication of a novel plasmonic cavity, intended to allow far-field recovery of signals arising from near field magneto-optical interactions, is presented. Finite element modeling is used to describe the interaction between a gold film, containing cross-shaped cavities, with a nearby magnetic under-layer. The modeling revealed strong electric field confinement near the center of the cross structure for certain optical wavelengths, which may be tuned by varying the length of the cross through a range that is compatible with available fabrication techniques. Furthermore, the magneto optical Kerr effect (MOKE) response of the composite structure can be enhanced with respect to that of the bare magnetic film. To confirm these findings, cavities were milled within gold films deposited upon a soluble film, allowing relocation to a ferromagnetic film using a float transfer technique. Cross cavity arrays were fabricated and characterized by optical transmission spectroscopy prior to floating, revealing resonances at optical wavelengths in good agreement with the finite element modeling. Following transfer to the magnetic film, circular test apertures within the gold film yielded clear magneto-optical signals even for diameters within the sub-wavelength regime. However, no magneto-optical signal was observed for the cross cavity arrays, since the FIB milling process was found to produce nanotube structures within the soluble under-layer that adhered to the gold. Further optimization of the fabrication process should allow recovery of magneto-optical signal from cross cavity structures.</p

Loughran, T. H.J.

Keatley, P. S.

Barnes, W. L.

Hicken, R. J.

Einsle, J. F.

Bowman, R. M.

Queen's University Belfast Research Portal

https://pure.qub.ac.uk/ws/files/159627759/Design_and_fabrication_of_plasmonic_cavities_for_magneto_optical_sensing.pdf

Design and fabrication of plasmonic cavities for magneto-optical sensing (dataset)

Abstract

Similar works

Full text

Available Versions

Crossref

Enlighten

Open Research Exeter

Enlighten: Publications

Open Research Exeter

Directory of Open Access Journals

Queen's University Belfast Research Portal