Magneto-plasmonics on perpendicular magnetic CoPt–Ag nanostructures with ZnO intermediate thin layers

Yamane, Haruki; Takeda, Keisuke; Kobayashi, Masanobu

doi:10.1063/1.4907753

Cited by 13 publications

(5 citation statements)

References 25 publications

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“…These nanostructures are composed of bare-metallic and hybrid-metallic magnetic materials distributed on planar substrates. Such structures exhibit novel properties arising from the modulation of the optical response to an external low-intensity magnetic field. ,− The unique properties of these nanostructures can be used to control and manipulate light at the nanoscale. In addition, the planar distributions of the MagPlas nanoantennas make them an effective choice for chip-based sensors.…”

Section: Magneto-optical Biosensorsmentioning

confidence: 99%

Magnetoplasmonic Nanomaterials for Biosensing/Imaging and in Vitro/in Vivo Biousability

et al. 2017

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Section: Magneto-optical Biosensorsmentioning

confidence: 99%

Magnetoplasmonic Nanomaterials for Biosensing/Imaging and in Vitro/in Vivo Biousability

et al. 2017

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“…27,28) With respect to magneto-plasmonics, I recently reported a unique MO behavior on perpendicular magnetic CoPt nanostructures combined with a NM (Ag or Au) fine grains, which show an increased Kerr rotation angle at a low magnetic field. 29,30) This unusual MO phenomenon is due to the excitation of localized surface plasmons in NM grains. In addition, I proposed an MO Fabry-Pérot etalon consisting of a stacked CoPt/Ag film with a ZnO intermediate layer.…”

Section: Introductionmentioning

confidence: 98%

Magneto-optical surface plasmon resonances on perpendicular magnetic thin films consisting of CoPt/ZnO/Ag stacked nanolayers

Yamane¹

2021

Jpn. J. Appl. Phys.

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Magneto-plasmonic phenomena on CoPt/ZnO/Ag stacked nanolayers were investigated in polar Kerr excitation geometry. The nanolayer displays an ideal square-shaped out-of-plane magnetic hysteresis loop with a large polar Kerr activity. The surface plasmon resonances (SPRs) induce drastic magneto-optical (MO) responses with a narrow linewidth and a sharp reversal of the Kerr polarity. The CoPt/ZnO/Ag nanolayer is a candidate for high-performance chemical sensor elements. For example, an MO‒SPR sensor with a Pd surface layer was applied for hydrogen detection. The Pd layer acts as a transducer for both hydrogen detection and plasmon response. Substantial MO responses to the exposure of hydrogen gas can be observed. The results show that the polarized sensing signal is not affected by the intensity of the incident light. The use of the new type of MO‒SPR element with polar Kerr activity leads to a stable chemical sensing system with a simple measurement configuration.

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“…In addition to OC structures, magnetic materials also have the opportunity to be another option for developing optical activity in the UV CD domain. One promising complementary composition that combines noble metals (NMs) and magnetic materials exerts a MO effect that is considerably large compared with those of NM-only or magnetic-only materials. − In addition, this composition’s integrated MO properties can be further enhanced by modifying the photon energy of left- and right-handed circularly polarized incident light. This research field is now known as the magnetoplasmonic field. − Typically, the magnetoplasmonic effect can be tuned by the alteration of the NM and the external magnetic field (a few Tesla).…”

Section: Introductionmentioning

confidence: 99%

Field-Free Magnetoplasmon-Induced Ultraviolet Circular Dichroism Switching in Premagnetized Magnetic Nanowires

Lin

Chen

Sun

et al. 2022

ACS Appl. Mater. Interfaces

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Broadband modulation of magnetic circular dichroism (MCD) using a relatively low magnetic field or by producing a field-free magnetoplasmonic effect in the remnant magnetic state was achieved by the integration of the noble metals (NMs) Au and Ag and the perpendicular magnetic anisotropy of Co with ZnO nanowires (NWs) used as the template. The samples containing NMs revealed MCD sign reversals and enhancements when compared with the original Co/ZnO NWs. The magnetoplasmonic effect of Au close to the visible light spectrum could induce the CD change in the visible region. Notably, the ultraviolet (UV) CD in Ag/Co/ZnO NWs is 12.5 times larger under a magnetic field (∼0.2 T) and 10 times greater in the remnant state (field-free) than those of the original Co/ZnO NWs because of the magnetoplasmonic effect of Ag in the UV spectrum. These results are attributable to the coupling of the remnant magnetic state of Co magnetization, the magnetoplasmons of the NMs, and the excitons of the ZnO NWs. The findings are potentially applicable in magneto-optical recording, biosensing, and energy contexts involving magnetoplasmonic functionalization.

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Magneto-plasmonics on perpendicular magnetic CoPt–Ag nanostructures with ZnO intermediate thin layers

Abstract: Articles you may be interested inRadio frequency sputtered Al:ZnO-Ag transparent conductor: A plasmonic nanostructure with enhanced optical and electrical properties

Cited by 13 publications

References 25 publications

Magnetoplasmonic Nanomaterials for Biosensing/Imaging and in Vitro/in Vivo Biousability

Magnetoplasmonic Nanomaterials for Biosensing/Imaging and in Vitro/in Vivo Biousability

Magneto-optical surface plasmon resonances on perpendicular magnetic thin films consisting of CoPt/ZnO/Ag stacked nanolayers

Field-Free Magnetoplasmon-Induced Ultraviolet Circular Dichroism Switching in Premagnetized Magnetic Nanowires

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