Enhanced Magneto-Optical Edge Excitation in Nanoscale Magnetic Disks

Berger, Andreas; Osa, R. Alcaraz de la; Suszka, A. K.; Pancaldi, Matteo; Saiz, J. M.; Moreno, Fernando; Oepen, Hans Peter; Vavassori, P.

doi:10.1103/physrevlett.115.187403

Cited by 21 publications

(13 citation statements)

References 31 publications

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“…-FEBID on liquid environment: Some work exists on the use of liquid-phase electron-beam-induced deposition for Pt, Cu and Ag (187) (188). In this case, the precursor is adsorbed on the substrate in liquid phase and a focused electron beam from an environmental SEM allows precursor decomposition into pure nanostructures.…”

Section: Discussionmentioning

confidence: 99%

Review of magnetic nanostructures grown by focused electron beam induced deposition (FEBID)

Teresa

Fernández-Pacheco

Córdoba

et al. 2016

J. Phys. D: Appl. Phys.

145

156

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We review the current status of the use of focused electron beam induced deposition (FEBID) for the growth of magnetic nanostructures. This technique relies on the local dissociation of a precursor gas by means of an electron beam. The most promising results have been obtained using the Co 2 (CO) 8 precursor, where the Co content in the grown nanodeposited material can be tailored up to more than 95%. Functional behaviour of these Co nanodeposits has been observed in applications such as arrays of magnetic dots for information storage and catalytic growth, magnetic tips for scanning probe microscopes, nano-Hall sensors for bead detection, nano-actuated magnetomechanical systems and nanowires for domain-wall manipulation. The review also covers interesting results observed in Fe-based and alloyed nanodeposits. Advantages and disadvantages of FEBID for the growth of magnetic nanostructures are discussed in the article as well as possible future directions in this field.

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Section: Discussionmentioning

confidence: 99%

Review of magnetic nanostructures grown by focused electron beam induced deposition (FEBID)

Teresa

Fernández-Pacheco

Córdoba

et al. 2016

J. Phys. D: Appl. Phys.

145

156

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“…The electromagnetic interaction with plasmonic meta-surfaces and crystals has emerged as a prominent route to developing more efficient devices for the active control of light at sub-wavelength scales [3][4][5] . One relevant example is the class of magnetoplasmonic surfaces and crystals, composed of arrangements of nanoantennas either entirely [6][7][8][9][10][11][12] or partially [13][14][15][16][17][18][19][20] made of magnetic materials. For other magnetoplasmonic designs, researchers explored the integration of plasmonic nanostructures with dielectric 21,22 or ferrimagnetic garnet 15,23 films, as well as the integration of magnetic films in surface plasmon polariton waveguides and cavities 24,25 .…”

Section: Introductionmentioning

confidence: 99%

“…To date, most studies of magnetoplasmonic nanostructures have exploited MO enhancement produced by bright (radiative) plasmon modes, such as localized dipolar plasmonic resonances (LPRs) [6][7][8][9][10][11][12][13][14][15][16][17][18][19] . For a circular disk-like magnetoplasmonic nanoantenna, the mechanism leading to the amplification of its MO response is well understood 36 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced magnetic modulation of light polarization exploiting hybridization with multipolar dark plasmons in magnetoplasmonic nanocavities

et al. 2020

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Enhancing magneto-optical effects is crucial for reducing the size of key photonic devices based on the non-reciprocal propagation of light and to enable active nanophotonics. Here, we disclose a currently unexplored approach that exploits hybridization with multipolar dark modes in specially designed magnetoplasmonic nanocavities to achieve a large enhancement of the magneto-optically induced modulation of light polarization. The broken geometrical symmetry of the design enables coupling with free-space light and hybridization of the multipolar dark modes of a plasmonic ring nanoresonator with the dipolar localized plasmon resonance of the ferromagnetic disk placed inside the ring. This hybridization results in a low-radiant multipolar Fano resonance that drives a strongly enhanced magneto-optically induced localized plasmon. The large amplification of the magneto-optical response of the nanocavity is the result of the large magneto-optically induced change in light polarization produced by the strongly enhanced radiant magneto-optical dipole, which is achieved by avoiding the simultaneous enhancement of reemitted light with incident polarization by the multipolar Fano resonance. The partial compensation of the magnetooptically induced polarization change caused by the large re-emission of light with the original polarization is a critical limitation of the magnetoplasmonic designs explored thus far and that is overcome by the approach proposed here.

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“…It is well-known that traditional xc kernels, such as the random-phase approximation (RPA), i.e., f xc = 0, and the adiabatic local-density approximation (ALDA) [4], fail to describe two important features of optical spectra: 1) excitonic effects and 2) the absorption onset. While excitonic effects can nowadays be described accurately for various systems with a several xc kernels [5][6][7][8][9][10], the correct description of the absorption onset within TDDFT remains an unsolved problem.…”

mentioning

confidence: 99%

“…We approximate f (2) xc with the polarization functional (PF) of Ref. [8] which accurately describes the excitonic effects in various systems. We will refer to the full kernel, i.e., f…”

mentioning

confidence: 99%

Accurate optical spectra of solids from pure time-dependent density functional theory

Cavo

Berger

2020

Phys. Rev. B

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We present accurate optical spectra of semiconductors and insulators within a pure Kohn-Sham time-dependent density-functional approach. In particular, we show that the onset of the absorption is well reproduced when comparing to experiment. No empirical information nor a theory beyond Kohn-Sham density-functional theory, such as GW , is invoked to correct the Kohn-Sham gap. Our approach relies on the link between the exchange-correlation kernel of time-dependent density functional theory and the derivative discontinuity of ground-state density-functional theory. We show explicitly how to relate these two quantities. We illustrate the accuracy and simplicity of our approach by applying it to a semiconductor and a wide-gap insulator.

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Enhanced Magneto-Optical Edge Excitation in Nanoscale Magnetic Disks

Cited by 21 publications

References 31 publications

Review of magnetic nanostructures grown by focused electron beam induced deposition (FEBID)

Review of magnetic nanostructures grown by focused electron beam induced deposition (FEBID)

Enhanced magnetic modulation of light polarization exploiting hybridization with multipolar dark plasmons in magnetoplasmonic nanocavities

Accurate optical spectra of solids from pure time-dependent density functional theory

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