Wireless at the Nanoscale: Towards Magnetically Tunable Beam Steering

Carvalho, William O. F.; Moncada-Villa, E.; Mejía‐Salazar, J. R.

doi:10.48550/arxiv.2204.13175

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…29,30 It is significant that the dipolar plasmonic radiation from a single horn-like magnetoplasmonic nanoaperture can be dynamically steered using applied magnetic fields. 31 In the latter work, the direction and magnitude of the tilt of the beam radiated from a single magnetoplasmonic nanoantenna to air could be controlled by the direction and magnitude of the magnetic field. To use the concept of magnetic beam steering in reconfigurable optical wireless communications in PICs, it is necessary to investigate magnetoplasmonic nanoantennas suitable for on-chip communication, such as the plasmonic Yagi−Uda nanoantenna.…”

Section: ■ Introductionmentioning

confidence: 98%

“…In this highly directive radiation nanostructure design, the magnetoplasmonic elements are coupled through near-field overlaps 7 in what is known as plasmon hybridization. 32 In contrast to the dipolar magnetoplasmonic nanoaperture, 31 which only has control over the transmitted/scattered field, the system in this work is able to transform the incident field into a highly directive radiated beam for on-chip optical wireless communications.…”

Section: ■ Introductionmentioning

confidence: 99%

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Magnetoplasmonic Nanoantennas for On-Chip Reconfigurable Optical Wireless Communications

Damasceno

Carvalho

Sodré

et al. 2023

ACS Appl. Mater. Interfaces

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On-chip wireless communications require optical nanoantennas with dynamically tunable radiation patterns, which may allow for higher integration with multiple nanoantennas instead of two fixed nanoantennas in existing approaches. In this paper, we introduce a concept to enable active manipulation of radiated beam steering using applied magnetic fields. The proposed system consists of a highly directive Yagi–Uda-like arrangement of magnetoplasmonic nanoribs made of Co6Ag94 and immersed in SiO2. Numerical demonstration of the tilting of the radiated beam from the nanoantenna on its plane is provided with full-wave electromagnetic simulations using the finite element method. The tilt direction of the radiated beam can be changed by reversing the magnetization direction, while the conventional plasmonic nanoantenna pattern is recovered by demagnetizing the system. The geometry of the nanoantenna can be tailored to work at optical or infrared wavelengths, but a proof of concept for λ = 700 nm is conducted for taking advantage of the high magneto-optical activity of Co6Ag94. The design was based on experimental data for materials that can be fabricated via nanolithography, thus permitting magnetically on-chip reconfigurable optical wireless communications.

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Section: ■ Introductionmentioning

confidence: 98%

Section: ■ Introductionmentioning

confidence: 99%

Magnetoplasmonic Nanoantennas for On-Chip Reconfigurable Optical Wireless Communications

Damasceno

Carvalho

Sodré

et al. 2023

ACS Appl. Mater. Interfaces

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Active manipulation of radiated fields by a magnetoplasmonic half-wave dipole nanoantenna

Carvalho¹,

Damasceno²,

Villa³

et al. 2023

Opt. Lett.

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We demonstrate a concept for the active manipulation of radiated fields by a magnetoplasmonic half-wave dipole nanoantenna. Our idea comprises a two arms nanoantenna, made of metallic ferromagnetic cobalt–silver alloy (Co6Ag94), inspired by the analogous radio frequency half-wave dipole antenna design. Numerical results, obtained under the magnetization saturation condition, indicate a tilting of the radiated beam depending on the magnitude and sense of the magnetization of the ferromagnetic material. Significantly, we obtained tilting angles as large as ± 9.7 ∘ around the y axis for the magnetization placed along the x or z axes, respectively. Results in this work not only open up a new, to the best of our knowledge, way to dynamically manipulate the beam steering at the chip-scale, but also contribute to unveil novel magneto-optical effects at the nanoscale.

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Wireless at the Nanoscale: Towards Magnetically Tunable Beam Steering

Cited by 2 publications

References 19 publications

Magnetoplasmonic Nanoantennas for On-Chip Reconfigurable Optical Wireless Communications

Magnetoplasmonic Nanoantennas for On-Chip Reconfigurable Optical Wireless Communications

Active manipulation of radiated fields by a magnetoplasmonic half-wave dipole nanoantenna

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