Ultradirectional optical nanoantennas with high radiation efficiency by core–shell nanoparticles

Meng, Zhenya; Cao, Hailin; Zhou, Di; Chen, Zhoujian; Zhu, Chengzhuo; Chen, Shiyong; Tan, Xiaoheng; Zhang, Yongliang

doi:10.1117/1.jnp.11.016005

Cited by 10 publications

(4 citation statements)

References 40 publications

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“…Recently, hybrid plasmon-dielectric Yagi-Uda nanoantennas have been proposed, which effectively use the advantages of both plasmon and dielectric nanoantennas [136,137]. In [136], it was proposed to use silver nanocylinders covered with a silicon shell as elements of the nanoantenna (Fig.…”

Section: Eqs Radiation Near Plasmonic Nanoparticles and Nanostructuresmentioning

confidence: 99%

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Control of the emission of elementary quantum systems using metamaterials and nanometaparticles

Климов¹

2021

Phys.-Usp.

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The most important direction in the development of fundamental and applied physics is the study of the properties of optical systems at nanoscales for creating optical and quantum computers, biosensors, single-photon sources for quantum informatics, DNA sequencing devices, detectors of various fields, etc. In all these cases, nanosize light sources such as dye molecules, quantum dots (epitaxial or colloidal), color centers in crystals, and nanocontacts in metals are of utmost importance. In the nanoenvironment, the characteristics of these elementary quantum systems—pumping rates, radiative and nonradiative decay rates, the local density of states, lifetimes, level shifts—experience changes, which can be used to create nanosize light sources with the desired properties. Modern theoretical and experimental works on controlling the emission of elementary quantum systems with the help of plasmonic and dielectric nanostructures, metamaterials, and metamaterial nanoparticles are analyzed.

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Section: Eqs Radiation Near Plasmonic Nanoparticles and Nanostructuresmentioning

confidence: 99%

“…In [137], a design of a hybrid plasmon-dielectric antenna based on silver nanospheres covered with a silicon shell was proposed (Fig. 21a).…”

Section: Eqs Radiation Near Plasmonic Nanoparticles and Nanostructuresmentioning

confidence: 99%

Control of the emission of elementary quantum systems using metamaterials and nanometaparticles

Климов¹

2021

Phys.-Usp.

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“…Different materials have been used in the optical NA such as dielectric [13][14][15], metallic [16,17], or hybrid materials [18][19][20][21]. Silicon has gained signi cant attention as a dielectric material in various applications such as point-to-point communications and solar cells due to its low cost and abundant fabrication process [22].…”

Section: Introductionmentioning

confidence: 99%

Beam-steering of Dielectric Flat Lens Nanoantenna with Elliptical Patch based on Antenna Displacement for Optical Wireless Applications

Helmy

Ibrahim

Saleh

2023

Preprint

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In this paper, the switched-beam nanoantenna (NA) concept is introduced with a theoretical design of an inhomogeneous dielectric flat lens modelled with different materials to steer and enhance the radiation in a particular direction based on shifting the illuminator element. Firstly, the design of hybrid plasmonic NA is introduced and analyzed considering different silicon patch shapes such as rectangular, circular, hexagonal, and elliptical shapes. The elliptical patch NA achieves a gain of up to 10.7 dBi and a return loss of -14.41 dB. Then the design of a gradient-index dielectric flat lens with the NA is introduced to improve the antenna performance by increasing the directivity and consequently decreasing the beam-width. Furthermore, the beam-steering capabilities by displacement of the NA according to different feeding points along the X and Y-direction. By using the gradient-index dielectric flat lens, the gain is increased to 18.4 dBi with an improvement in the return loss reach to -19.15 dB compared with traditional NA. In addition, the beam-steering capabilities were achieved with a range ± 60° × ±55° with acceptable average antenna gain, side-lobe levels, and half power beam-width of 16.5 dBi, -12.3 dB and 13.6° respectively.

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“…Such applications are more inclined to plasmonic photocatalysis that experienced considerable developments as an efficient technique for the conversion of solar energy [24]- [26], thereby proving to be prudent alternative to conventional (less efficient) semiconductor catalysis [25], [26]. Apart from these, the coreshell nanoparticles-based nanoantennas have been reported to yield improved directivity, and therefore, have potentials in the development of nanoscale laser and photovoltaic devices [27], [28].…”

Section: Introductionmentioning

confidence: 99%

On the Scattering and Absorption by the SiO₂-VO₂Core-Shell Nanoparticles Under Different Thermal Conditions

et al. 2020

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The core-shell kinds of nanoparticles are greatly useful in biomedical applications inclined to targeted drug delivery, sensing, etc. The electromagnetic interaction characteristics of silicon dioxide (SiO 2 )-vanadium dioxide (VO 2 ) core-shell nanoparticle of deep subwavelength size are discussed. The assumptions allow the use of Rayleigh scattering theory for analytical approach. Because of VO 2 having inherent temperature-dependent constitutive characteristics, the light-matter interaction properties are taken into account in terms of normalized polarizability, scattering-and absorption cross-sections, considering the different values of size parameters as well as ambient temperature. It is found that the dimensional properties of chosen nanoparticles can be exploited to tune the spectral features, and also, the usefulness of these becomes obvious in temperature sensing. Moreover, the effect of interchanging the core/shell mediums (of the nanoparticles) on the scattering and absorption characteristics are also obtained. The results reveal the loss of resonance in this case.INDEX TERMS Core-shell nanoparticle, scattering, polarizability.

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Ultradirectional optical nanoantennas with high radiation efficiency by core–shell nanoparticles

Cited by 10 publications

References 40 publications

Control of the emission of elementary quantum systems using metamaterials and nanometaparticles

Control of the emission of elementary quantum systems using metamaterials and nanometaparticles

Beam-steering of Dielectric Flat Lens Nanoantenna with Elliptical Patch based on Antenna Displacement for Optical Wireless Applications

On the Scattering and Absorption by the SiO₂-VO₂Core-Shell Nanoparticles Under Different Thermal Conditions

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Ultradirectional optical nanoantennas with high radiation efficiency by core–shell nanoparticles

Cited by 10 publications

References 40 publications

Control of the emission of elementary quantum systems using metamaterials and nanometaparticles

Control of the emission of elementary quantum systems using metamaterials and nanometaparticles

Beam-steering of Dielectric Flat Lens Nanoantenna with Elliptical Patch based on Antenna Displacement for Optical Wireless Applications

On the Scattering and Absorption by the SiO2-VO2Core-Shell Nanoparticles Under Different Thermal Conditions

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On the Scattering and Absorption by the SiO₂-VO₂Core-Shell Nanoparticles Under Different Thermal Conditions