Magnetic and Electric Hotspots with Silicon Nanodimers

Bakker, Reuben M.; Permyakov, Dmitry V.; Yu, Yi; Markovich, Dmitry; Paniagua‐Domínguez, Ramón; Gonzaga, Leonard; Samusev, A. K.; Kivshar, Yuri S.; Luk’yanchuk, Boris; Кузнецов, А. И.

doi:10.1021/acs.nanolett.5b00128

Cited by 399 publications

(373 citation statements)

References 34 publications

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“…Indeed, high-index dielectrics have been extensively investigated for the development of nanoscale photonic devices [17][18][19][20][21][22][23]. Based on this notion, silicon nanodisks have been recently reported to produce a third harmonic (TH) conversion efficiency (TH) of 8×10 -6 % when excited at the dipole magnetic resonance, where the electric field is efficiently distributed inside the nanostructure [24].…”

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confidence: 99%

Enhanced Third Harmonic Generation in Single Germanium Nanodisks Excited at the Anapole Mode

et al. 2016

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ABSTRACT. We present an all-dielectric germanium nanosystem exhibiting a strong third order nonlinear response and efficient third harmonic generation in the optical regime. A thin germanium nanodisk shows a pronounced valley in its scattering cross section close to the dark anapole mode, while the electric field energy inside the disk is maximized due to high confinement within the dielectric. We investigate the dependence of the third harmonic signal on disk size and pump wavelength to reveal the nature of the anapole mode. Each germanium nanodisk generates a high effective third order susceptibility of (3) = 4.3 10 −9, corresponding to an associated third harmonic conversion efficiency of 0.0001% at a wavelength of 1650 nm, which is four orders of magnitude greater than the case of an unstructured germanium reference film. Furthermore, the nonlinear conversion via the anapole mode outperforms that via the radiative dipolar resonances by about one order of magnitude, which is consistent with our numerical simulations. These findings open new possibilities for the optimization of upconversion processes on the nanoscale through the appropriate engineering of suitable dielectric materials.

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confidence: 99%

Enhanced Third Harmonic Generation in Single Germanium Nanodisks Excited at the Anapole Mode

et al. 2016

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“…This gives a 229% and a 220% enhancement relative to the single HMIM on a glass substrate. In addition, compared to other structures such as high-index dielectric nanostructures [23,24], the MIM structures provide higher localization and enhancement, however they are more complex in architecture and fabrication processes compared to highindex dielectric nanostructures, but the use of each depends on the specific application. …”

Section: Results and Analysismentioning

confidence: 99%

Giant Magnetic Field Enhancement in Hybridized MIM Structures

Alrasheed

2017

IEEE Photon. Technol. Lett.

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Abstract-We propose numerically an approach to narrow the plasmon linewidth and enhance the magnetic near field intensity at a magnetic hot spot in a hybridized metal-insulatormetal (MIM) structure. First we insert in part of the dielectric layer of the MIM, at its center, another dielectric material of a high refractive index (HRI). This results in an increase in the magnetic near field enhancement of the magnetic plasmon (MP) resonance by 82% compared with the MIM without the HRI material. We then couple this enhanced MP resonance to a propagating surface plasmon polariton (SPP) to achieve a further enhancement of 438%. The strong coupling between the MP and the SPP is demonstrated by the large anti-crossing in the reflection spectra. The resulting maximum magnetic field enhancement at the gap is ∼ H H i 2 = 3555 .

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“…They give a novel way to directly engineer electromagnetic field response at optical frequencies. Specially, these high refractive index nanoparticles can be designed to a new building block for scalable, tunable, and low-loss metamaterials [17]. A single dielectric spherical nanoparticle exhibited both magnetic dipole and magnetic dipole resonances.…”

Section: Introductionmentioning

confidence: 99%

Broadband Electromagnetic Dipole Resonance by the Coupling Effect of Multiple Dielectric Nanocylinders

Fang

Jing

et al. 2018

Applied Sciences

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Broadband resonant scattering in a visible region that can be obtained by coupled multiple silicon nanocylinders. For a single high refractive index silicon nanocylinder, the electric dipole and magnetic dipole resonances can be observed. By constructing a silicon nanocylinder dimer, the interaction between the particles plays an important role in broadband scattering. Interestingly, due to magnetic-magnetic dipole interaction, a splitting phenomenon of magnetic resonance mode is revealed. A new magnetic resonant mode emerges at a longer wavelength in dimer and trimer by changing the diameter of one nanocylinder in dimer or trimer, and the gap size between nanocylinders. The scattering bandwidth can further increase with the effect of substrate, which is attributed to the extension of resonant mode into substrate. The broadband optical response can be revealed by the calculated scattering resonant spectra and the spatial electromagnetic field distributions. Furthermore, the transmission of periodic nanocylinder structure, including single nanocylinder and dimer, is demonstrated. By decreasing the gap between nanocylinders in dimer for periodic array structure, a new electric resonant mode occurs. These results can provide a guideline to realize broadband resonant optical elements.

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Magnetic and Electric Hotspots with Silicon Nanodimers

Cited by 399 publications

References 34 publications

Enhanced Third Harmonic Generation in Single Germanium Nanodisks Excited at the Anapole Mode

Enhanced Third Harmonic Generation in Single Germanium Nanodisks Excited at the Anapole Mode

Giant Magnetic Field Enhancement in Hybridized MIM Structures

Broadband Electromagnetic Dipole Resonance by the Coupling Effect of Multiple Dielectric Nanocylinders

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