Surface-plasmon-polariton-driven narrow-linewidth magneto-optics in Ni nanodisk arrays
The field of magnetoplasmonics exploits interactions between light and magnetic matter at the nanoscale for light manipulation and resonant magneto-optics. One of the great challenges of this field is overcoming optical losses in magnetic metals. Here, we exploit surface plasmon polaritons (SPPs) ex...
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| Format: | Article |
| Language: | English |
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De Gruyter
2019-12-01
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| Series: | Nanophotonics |
| Subjects: | |
| Online Access: | http://www.degruyter.com/view/j/nanoph.2020.9.issue-1/nanoph-2019-0331/nanoph-2019-0331.xml?format=INT |
| _version_ | 1830179192367480832 |
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| author | Freire-Fernández Francisco Kataja Mikko van Dijken Sebastiaan |
| author_facet | Freire-Fernández Francisco Kataja Mikko van Dijken Sebastiaan |
| author_sort | Freire-Fernández Francisco |
| collection | DOAJ |
| description | The field of magnetoplasmonics exploits interactions between light and magnetic matter at the nanoscale for light manipulation and resonant magneto-optics. One of the great challenges of this field is overcoming optical losses in magnetic metals. Here, we exploit surface plasmon polaritons (SPPs) excited at the interface of an SiO2/Au bilayer to induce strong magneto-optical responses on the Ni nanodisks of a periodic array. Using a reference system made of Au nanodisks, we show that optical losses in Ni hardly broaden the linewidth of SPP-driven magneto-optical signals. Loss mitigation is attained because the free electrons in the Ni nanodisks are driven into forced oscillations away from their plasmon resonance. By varying the SiO2 layer thickness and lattice constant of the Ni nanodisk array, we demonstrate tailoring of intense magneto-optical Kerr effects with a spectral linewidth down to ~25 nm. Our results provide important hints on how to circumvent optical losses and enhance magneto-optical signals via the design of off-resonance magnetoplasmonic driving mechanisms. |
| first_indexed | 2024-12-17T19:55:26Z |
| format | Article |
| id | doaj.art-9f56997b12ae48f882269e3bbe6a443e |
| institution | Directory Open Access Journal |
| issn | 2192-8614 |
| language | English |
| last_indexed | 2024-12-17T19:55:26Z |
| publishDate | 2019-12-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj.art-9f56997b12ae48f882269e3bbe6a443e2022-12-21T21:34:37ZengDe GruyterNanophotonics2192-86142019-12-019111312110.1515/nanoph-2019-0331nanoph-2019-0331Surface-plasmon-polariton-driven narrow-linewidth magneto-optics in Ni nanodisk arraysFreire-Fernández Francisco0Kataja Mikko1van Dijken Sebastiaan2NanoSpin, Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, FinlandNanoSpin, Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, FinlandNanoSpin, Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, FinlandThe field of magnetoplasmonics exploits interactions between light and magnetic matter at the nanoscale for light manipulation and resonant magneto-optics. One of the great challenges of this field is overcoming optical losses in magnetic metals. Here, we exploit surface plasmon polaritons (SPPs) excited at the interface of an SiO2/Au bilayer to induce strong magneto-optical responses on the Ni nanodisks of a periodic array. Using a reference system made of Au nanodisks, we show that optical losses in Ni hardly broaden the linewidth of SPP-driven magneto-optical signals. Loss mitigation is attained because the free electrons in the Ni nanodisks are driven into forced oscillations away from their plasmon resonance. By varying the SiO2 layer thickness and lattice constant of the Ni nanodisk array, we demonstrate tailoring of intense magneto-optical Kerr effects with a spectral linewidth down to ~25 nm. Our results provide important hints on how to circumvent optical losses and enhance magneto-optical signals via the design of off-resonance magnetoplasmonic driving mechanisms.http://www.degruyter.com/view/j/nanoph.2020.9.issue-1/nanoph-2019-0331/nanoph-2019-0331.xml?format=INTmagnetoplasmonicsnanoparticle arraysurface plasmon polaritonsurface lattice resonancemagneto-optical kerr effect |
| spellingShingle | Freire-Fernández Francisco Kataja Mikko van Dijken Sebastiaan Surface-plasmon-polariton-driven narrow-linewidth magneto-optics in Ni nanodisk arrays Nanophotonics magnetoplasmonics nanoparticle array surface plasmon polariton surface lattice resonance magneto-optical kerr effect |
| title | Surface-plasmon-polariton-driven narrow-linewidth magneto-optics in Ni nanodisk arrays |
| title_full | Surface-plasmon-polariton-driven narrow-linewidth magneto-optics in Ni nanodisk arrays |
| title_fullStr | Surface-plasmon-polariton-driven narrow-linewidth magneto-optics in Ni nanodisk arrays |
| title_full_unstemmed | Surface-plasmon-polariton-driven narrow-linewidth magneto-optics in Ni nanodisk arrays |
| title_short | Surface-plasmon-polariton-driven narrow-linewidth magneto-optics in Ni nanodisk arrays |
| title_sort | surface plasmon polariton driven narrow linewidth magneto optics in ni nanodisk arrays |
| topic | magnetoplasmonics nanoparticle array surface plasmon polariton surface lattice resonance magneto-optical kerr effect |
| url | http://www.degruyter.com/view/j/nanoph.2020.9.issue-1/nanoph-2019-0331/nanoph-2019-0331.xml?format=INT |
| work_keys_str_mv | AT freirefernandezfrancisco surfaceplasmonpolaritondrivennarrowlinewidthmagnetoopticsinninanodiskarrays AT katajamikko surfaceplasmonpolaritondrivennarrowlinewidthmagnetoopticsinninanodiskarrays AT vandijkensebastiaan surfaceplasmonpolaritondrivennarrowlinewidthmagnetoopticsinninanodiskarrays |