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Artículos de revistas sobre el tema "Magnetic dipole nanoantenna"

Autor: Grafiati
Publicado: 25 de mayo de 2024
Última modificación: 31 de julio de 2025

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1

Fujii, Minoru, and Hiroshi Sugimoto. "(Invited, Digital Presentation) Enhancement of Magnetic Dipole Transition of Molecules By Silicon Nanoparticle Nanoantenna." ECS Meeting Abstracts MA2022-01, no. 20 (2022): 1081. http://dx.doi.org/10.1149/ma2022-01201081mtgabs.

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A nanoantenna is a nanodevice that manipulates light propagation and enhances light-matter interaction at the nanoscale. Integration of an emitter into a nanoantenna capable of increasing local density of photonic states at the emission wavelength results in the enhanced spontaneous emission rate (Purcell effect). The most widely studied nanoantennas for the Purcell enhancement are plasmonic nanoantennas made from gold or silver nanostructures supporting surface plasmon resonances. In most cases, nanoantennas have been used for the enhancement of electric dipole-allowed transition of a molecul
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2

Fujii, Minoru, and Hiroshi Sugimoto. "(Invited) Mie Resonant Silicon Nanosphere Nanoantenna for Fluorescence Enhancement." ECS Meeting Abstracts MA2024-01, no. 23 (2024): 1356. http://dx.doi.org/10.1149/ma2024-01231356mtgabs.

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A nanoantenna is a device that manipulates light propagation and enhances light-matter interaction at the nanoscale. Integration of an emitter into a nanoantenna capable of increasing local density of photonic states at the emission wavelength results in the enhancement of the spontaneous emission rate (Purcell effect) and modifies the emission spectrum. A nanoantenna can also control the directionality and radiation pattern of an emitter. Traditionally, plasmonic nanoantennas made from gold or silver nanostructures supporting localized surface plasmon resonances had been the main stream of th
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3

Agrahari, Rajan, and Hadi K. Shamkhi. "Highly Directive All-Dielectric Nanoantenna." Journal of Physics: Conference Series 2015, no. 1 (2021): 012003. http://dx.doi.org/10.1088/1742-6596/2015/1/012003.

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Abstract A highly directive dielectric nanoantenna in an integrated chip may enable faster communication as their low losses and small size overcome the limitation of temperature enhancement and low data transfer rate. We optimize nanoantenna consist of Si-nanoblock in the near-infrared region to efficiently transfer a point dipole light to a highly directive light in the far-field region. We engineer the intrinsic electric and magnetic resonances of a Si-block nanoantenna by modifying and reducing its geometrical symmetry. We realize a pronounced enhancement of directivity by systematically i
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4

KUMAR, V. DINESH, ABHINAV BHARDWAJ, DEEPAK MISHRA, and KIYOSHI ASAKAWA. "DIRECTIONAL AND POLARIZATION PROPERTIES OF A PLASMONIC CROSS NANOANTENNA." Journal of Nonlinear Optical Physics & Materials 19, no. 04 (2010): 517–25. http://dx.doi.org/10.1142/s0218863510005418.

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The response of dipole nanoantennas (DNAs) studied widely in optical frequency range is sensitive to polarization of incident field. In this paper, we report the implementation of a cross nanoantenna (CNA) consisting of two orthogonal DNAs with a common feedgap and investigate its directional and polarization properties and compare them with those of the DNA. Interestingly the response of CNA is independent of polarization. We can operate the CNA in turnstile mode by using two identical light sources with cross polarization in phase quadrature. In such a case the radiation from the CNA is foun
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5

Xu, Lei, Mohsen Rahmani, Daria Smirnova, et al. "Highly-Efficient Longitudinal Second-Harmonic Generation from Doubly-Resonant AlGaAs Nanoantennas." Photonics 5, no. 3 (2018): 29. http://dx.doi.org/10.3390/photonics5030029.

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We design an asymmetric nonlinear optical nanoantenna composed of a dielectric nanodisc and an adjacent nanobar. The proposed composite structure made of AlGaAs exhibits resonant response at both the fundamental and doubled frequencies. Being driven by the strong magnetic dipole resonance at the pump wavelength and a high-quality mode at the harmonic wavelength, the efficient second-harmonic radiation is generated predominantly along the vertical directions under the normally incident plane-wave excitation.
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6

Castanié, E., R. Vincent, R. Pierrat, and R. Carminati. "Absorption by an Optical Dipole Antenna in a Structured Environment." International Journal of Optics 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/452047.

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We compute generalized absorption and extinction cross-sections of an optical dipole nanoantenna in a structured environment. The expressions explicitly show the influence of radiation reaction and the local density of states on the intrinsic absorption properties of the antenna. Engineering the environment could allow to modify the overall absorption as well as the frequency and the linewidth of a resonant antenna. Conversely, a dipole antenna can be used to probe the photonic environment, in a similar way as a quantum emitter.
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7

Kumar, Abhinandan, and Nabin Kumar. "Rabi Waves for Excitation of Quantum Nanoantenna with Electrically Controlled Radiation Pattern and Its Application." Bulletin of Pure and Applied Sciences – Physics 42, no. 2 (2023): 84–88. http://dx.doi.org/10.48165/bpas.2023.42d.2.4.

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Rabi waves for the excitation of quantum nanoantennas with electrically controlled radiation and frequency characteristics were studied. The operational frequency of the visible range was based on the high frequency component of the current. The low frequency component and its operational frequency was in the terahertz range. The feature of the Rabi wave antenna depends on the carrier frequency on the electromagnetic field intensity. The contribution of high order magnetic multipoles became essential. The radiation properties of an antenna were the same as the ideal magnetic dipole. The antenn
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8

Decker, M., T. Pertsch, and I. Staude. "Strong coupling in hybrid metal–dielectric nanoresonators." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 375, no. 2090 (2017): 20160312. http://dx.doi.org/10.1098/rsta.2016.0312.

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We study resonant photonic–plasmonic coupling between a gold dipole nanoantenna and a silicon nanodisc supporting electric and magnetic dipolar Mie-type resonances. Specifically, we consider two different cases for the mode structure of the silicon nanodisc, namely spectrally separate and spectrally matching electric and magnetic dipolar Mie-type resonances. In the latter case, the dielectric nanoparticle scatters the far fields of a unidirectional Huygens’ source. Our results reveal an anticrossing of the plasmonic dipole resonance and the magnetic Mie-type dipole resonance of the silicon nan
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9

Kalinic, Boris, Tiziana Cesca, Mirko Trevisani, Andrea Jacassi, Riccardo Sapienza, and Giovanni Mattei. "Strong Er3+ radiative emission enhancement by quasi-BIC modes coupling in all-dielectric slot nanoantenna arrays." EPJ Web of Conferences 287 (2023): 05002. http://dx.doi.org/10.1051/epjconf/202328705002.

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We have designed and realized all-dielectric lossless nanoantennas, in which a thin SiO2 layer doped with erbium ions is placed inside slotted silicon nanopillars arranged in a square array. The modal analysis has evi-denced that the slotted nanopillar array supports optical quasi-BIC resonances with ultra-high Q-factors (up to Q∼109), able to boost the electromagnetic local density of optical states in the optically active layer. Up to 3 orders of magnitude photoluminescence intensity increment and 2 orders of magnitude decay rate enhancement have been measured at room temperature when the Er
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10

Pakizeh, Tavakol. "Unidirectional radiation of a magnetic dipole coupled to an ultracompact nanoantenna at visible wavelengths." Journal of the Optical Society of America B 29, no. 9 (2012): 2446. http://dx.doi.org/10.1364/josab.29.002446.

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11

Karimi, Vahid, Dominic Bosomtwi, Li Liu, and Viktoriia Babicheva. "(Invited) Engineering Multipolar Resonances in Nonlocal Metasurfaces." ECS Meeting Abstracts MA2024-02, no. 35 (2024): 2454. https://doi.org/10.1149/ma2024-02352454mtgabs.

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When arranged in a metasurface, enhancing field interactions within scattering elements enables precise control over incident light phase and amplitude. This arrangement induces scattering waves in each element, which then interact with neighboring elements, leading to lattice resonances. The scatterer materials can be categorized into lossy ones, including transition metal dichalcogenides and titanium, and high-refractive-index ones, such as silicon. Periodic lattice arrays support strong localized resonances through the collective response of individual antennas [1]. High-refractive-index an
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12

Kroychuk, Maria K., Alexander S. Shorokhov, Damir F. Yagudin, et al. "Quantum Dot Photoluminescence Enhancement in GaAs Nanopillar Oligomers Driven by Collective Magnetic Modes." Nanomaterials 13, no. 3 (2023): 507. http://dx.doi.org/10.3390/nano13030507.

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Single photon sources based on semiconductor quantum dots are one of the most prospective elements for optical quantum computing and cryptography. Such systems are often based on Bragg resonators, which provide several ways to control the emission of quantum dots. However, the fabrication of periodic structures with many thin layers is difficult. On the other hand, the coupling of single-photon sources with resonant nanoclusters made of high-index dielectric materials is known as a promising way for emission control. Our experiments and calculations show that the excitation of magnetic Mie-typ
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13

Tanaka, Yoshito Y., Tomoya Kimura, and Tsutomu Shimura. "Unidirectional emission of phase-controlled second harmonic generation from a plasmonic nanoantenna." Nanophotonics 10, no. 18 (2021): 4601–9. http://dx.doi.org/10.1515/nanoph-2021-0470.

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Abstract Shaping the emission pattern of second harmonic (SH) generation from plasmonic nanoparticles is important for practical applications in nonlinear nanophotonics but is rendered challenging by the complex second-order nonlinear-optical processes. Here, we theoretically and experimentally demonstrate that a pair of V- and Y-shaped gold nanoparticles directs the SH emission perpendicularly to an incident light direction. Owing to spatial overlap of two orthogonal plasmonic dipole modes at the fundamental and SH wavelengths of the individual particles, surface SH polarizations induced by t
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14

Dyshlyuk, Anton V., Andrey A. Bogdanov, and Oleg B. Vitrik. "A simple analytic approach to the problem of excitation of surface plasmon polaritons with a dipole nanoantenna." Photonics and Nanostructures - Fundamentals and Applications 43 (February 2021): 100895. http://dx.doi.org/10.1016/j.photonics.2021.100895.

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15

Borovkov, Dmitrii, and Adrià Canós Valero. "Toroidal anapole with point magnetic dipoles." Journal of Physics: Conference Series 2388, no. 1 (2022): 012018. http://dx.doi.org/10.1088/1742-6596/2388/1/012018.

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Abstract The role of multipolar expansion of the localized current is significant in a broad range of disciplines in the physics of nowadays. It is actively used in such problems as the design of nanoantennas in photonics or the description of exotic states of matter. The toroidal multipoles are the third group of multipoles which complements the electric and magnetic multipolar families. The investigation of toroidal multipoles is important because of their role in the formation of so-called anapole states, non-radiating sources. The further study showed that there are also exist the higher-o
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16

Raya, Andrés M., David Fuster, and José M. Llorens. "Numerical Study on Mie Resonances in Single GaAs Nanomembranes." Nanomaterials 9, no. 6 (2019): 856. http://dx.doi.org/10.3390/nano9060856.

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GaAs nanomembranes grown by selective area epitaxy are novel structures. The high refractive index of GaAs makes them good candidates for nanoantennas. We numerically studied the optical modal structure of the resonator. The nanomembrane geometry introduces a strong light-polarization dependence. The scattering is dominated by an electric dipole contribution for polarization along the nanomembrane long dimension and by a magnetic dipole contribution in the orthogonal direction. The dependence on the geometry of the resonances close to the GaAs band gap was modeled by a single coefficient. It d
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17

Czajkowski, Krzysztof M., Maria Bancerek, Alexander Korneluk, Dominika Świtlik, and Tomasz J. Antosiewicz. "Polarization-dependent mode coupling in hyperbolic nanospheres." Nanophotonics 10, no. 10 (2021): 2737–51. http://dx.doi.org/10.1515/nanoph-2021-0247.

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Abstract Hyperbolic materials offer much wider freedom in designing optical properties of nanostructures than ones with isotropic and elliptical dispersion, both metallic or dielectric. Here, we present a detailed theoretical and numerical study on the unique optical properties of spherical nanoantennas composed of such materials. Hyperbolic nanospheres exhibit a rich modal structure that, depending on the polarization and direction of incident light, can exhibit either a full plasmonic-like response with multiple electric resonances, a single, dominant electric dipole or one with mixed magnet
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18

Mivelle, Mathieu, Thierry Grosjean, Geoffrey W. Burr, Ulrich C. Fischer, and Maria F. Garcia-Parajo. "Strong Modification of Magnetic Dipole Emission through Diabolo Nanoantennas." ACS Photonics 2, no. 8 (2015): 1071–76. http://dx.doi.org/10.1021/acsphotonics.5b00128.

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19

Giordano, Maria Caterina, Matteo Barelli, Giuseppe Della Valle, and Francesco Buatier de Mongeot. "Self-Organized Conductive Gratings of Au Nanostripe Dimers Enable Tunable Plasmonic Activity." Applied Sciences 10, no. 4 (2020): 1301. http://dx.doi.org/10.3390/app10041301.

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Plasmonic metasurfaces based on quasi-one-dimensional (1D) nanostripe arrays are homogeneously prepared over large-area substrates (cm2), exploiting a novel self-organized nanofabrication method. Glass templates are nanopatterned by ion beam-induced anisotropic nanoscale wrinkling, enabling the maskless confinement of quasi-1D arrays of out-of-plane tilted gold nanostripes, behaving as transparent wire-grid polarizer nanoelectrodes. These templates enable the dichroic excitation of localized surface plasmon resonances, easily tunable over a broadband spectrum from the visible to the near- and
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20

Borovkov, Dmitrii, and Adrià Canós Valero. "On the link between mean square-radii and high-order toroidal moments." Journal of Physics: Conference Series 2015, no. 1 (2021): 012021. http://dx.doi.org/10.1088/1742-6596/2015/1/012021.

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Abstract Multipole expansions of the source play an important role in a broad range of disciplines in modern physics, ranging from the description of exotic states of matter to the design of nanoantennas in photonics. Within the context of the latter, toroidal multipoles, a third group of multipoles complementing the well-known electric and magnetic ones, have been widely investigated since they lead to the formation of non-radiating sources. In the last years, however, the photonics community has brought to light the existence of a fourth type of multipoles that is commonly overlooked. Curren
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21

Wang, Xinghua, Yunbao Zheng, Min Ouyang, Haihua Fan, Qiaofeng Dai, and Haiying Liu. "Dual-Wavelength Forward-Enhanced Directional Scattering and Second Harmonic Enhancement in Open-Hole Silicon Nanoblock." Nanomaterials 12, no. 23 (2022): 4259. http://dx.doi.org/10.3390/nano12234259.

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Nanostructures with appropriate sizes can limit light-matter interaction and support electromagnetic multipole resonance. The interaction between light and nanostructures is intimately related to manipulating the direction of scattered light in the far field as well as the electromagnetic field in the near field. In this paper, we demonstrate dual-wavelength directional forward-scattering enhancement in an individual open-hole silicon nanoblock (OH-SiNB) and simultaneously achieve bulk and surface electromagnetic field localization. The second harmonic generation is enhanced using electromagne
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22

Hu, Hong-Gang, Min Yang, Peng Yue, Ya-Ting Bai, Wen-Jie Wang, and Shao-Ding Liu. "Second-harmonic generation with metal/dielectric/metal hybridized nanoantennas: enhanced efficiency, reduced mode volume and ideal magnetic/electric dipole scattering." Journal of Physics D: Applied Physics 53, no. 21 (2020): 215101. http://dx.doi.org/10.1088/1361-6463/ab768d.

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23

Jiang, Hui, Yangjian Cai, and Zhanghua Han. "Strong second-harmonic generation in dielectric optical nanoantennas resulting from the hybridization of magnetic dipoles and lattice resonances." Journal of the Optical Society of America B 37, no. 11 (2020): 3146. http://dx.doi.org/10.1364/josab.402624.

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24

García‐Puente, Yalina, and Raman Kashyap. "Magnetic Purcell Enhancement in a Nanoantenna‐Spherical Bragg Resonator Coupled System." Annalen der Physik, October 2, 2023. http://dx.doi.org/10.1002/andp.202300147.

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AbstractIn this work, a novel approach for enhancing magnetic fields in all‐dielectric nanoantennas using Spherical Bragg Resonators (SBR) is proposed, which can boost quantum emitters' magnetic transitions. A matrix method has been used to optimize the magnetic dipole resonance of a SiO2/Si core‐shell spherical nanoantenna. The radiative and non‐radiative decay rate of a Eu3+ emitter with a quantum efficiency of ∼80% is studied. The findings revealed that the magnetic dipole nanoantenna resonance coupling with the SBR mode significantly enhances the modal magnetic field. A 4‐layer SiO2/Si SBR
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25

Rosales, Sual A., Pablo Albella, Francisco González, Yael Gutierrez, and Fernando Moreno. "CDDA: extension and analysis of the discrete dipole approximation for chiral systems." October 2, 2021. https://doi.org/10.5281/zenodo.5545983.

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Discrete dipole approximation (DDA) is a computational method broadly used to solve light scattering problems. In this work, we propose an extension of DDA that we call Chiral-DDA (CDDA), to study light-chiral matter interactions with the capability of describing the underlying physics behind. Here, CDDA is used to solve and analyze the interaction of a nanoantenna (either metallic or dielectric) with a chiral molecule located in its near field at different positions. Our method allowed to relate near field interactions with far field spectral response of the system, elucidating the role that
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26

Rusak, Evgenia, Jakob Straubel, Piotr Gładysz, et al. "Enhancement of and interference among higher order multipole transitions in molecules near a plasmonic nanoantenna." Nature Communications 10, no. 1 (2019). http://dx.doi.org/10.1038/s41467-019-13748-4.

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AbstractSpontaneous emission of quantum emitters can be modified by their optical environment, such as a resonant nanoantenna. This impact is usually evaluated under assumption that each molecular transition is dominated only by one multipolar channel, commonly the electric dipole. In this article, we go beyond the electric dipole approximation and take light-matter coupling through higher-order multipoles into account. We investigate a strong enhancement of the magnetic dipole and electric quadrupole emission channels of a molecule adjacent to a plasmonic nanoantenna. Additionally, we introdu
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27

Zhang Han-mou, Xiao Fajun, and Zhao Jianlin. "Unidirectional scattering of Si ring-Au split ring nanoantenna excited by a tightly focused azimuthally polarized beam." Acta Physica Sinica, 2022, 0. http://dx.doi.org/10.7498/aps.71.20212212.

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Unidirectional scattering of various plasmonic nanoantennas has been extensively studied, giving birth to applications such as optical sensors, solar cells, spectroscopy and light-emitting devices. The directional scattering of magnetic nanoantennas remains unexplored, though obvious benefits of artificial magnetism applications including metamaterials, cloaking and nonlinear optical resonance. In this work, we numerically investigate the far-field scattering properties of the Si ring-Au split ring nanoantenna (Si R-Au SRN) excited by a tightly focused azimuthally polarized beam (APB) with the
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28

"Silicon cuboid nanoantenna with simultaneous large Purcell factor for electric dipole, magnetic dipole and electric quadrupole emission." Opto-Electronic Advances 5, no. 2 (2022): 210024. http://dx.doi.org/10.29026/oea.2022.210024.

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29

Habil, Mojtaba Karimi, Carlos J. Zapata–Rodríguez, Mauro Cuevas, and Samad Roshan Entezar. "Multipolar-sensitive engineering of magnetic dipole spontaneous emission with a dielectric nanoresonator antenna." Scientific Reports 11, no. 1 (2021). http://dx.doi.org/10.1038/s41598-021-92322-9.

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AbstractWe propose an axisymmetric silicon nanoresonator with designed tapered angle well for the extraordinary enhancement of the decay rate of magnetic dipole (MD) emitters. Due to the resonant coupling of a MD emitter and the MD mode of the subwavelength resonator, the Purcell factor (PF) can easily reach 500, which is significantly higher than the PF when using a silicon nanosphere of the same size. The PF and the resonance frequency are conveniently tuned through the resonator diameter and the taper angle of the blind hole. When supported by a metallic substrate, further enhancement ($$&g
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30

Negoro, Hidemasa, Hiroshi Sugimoto, and Minoru Fujii. "Circularly Polarized Scattering Radiation From a Silicon Nanosphere." Advanced Optical Materials, October 18, 2023. http://dx.doi.org/10.1002/adom.202301850.

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AbstractA dielectric nanosphere with orthogonal electric dipole (ED) and magnetic dipole (MD) Mie resonances can be a nanoantenna radiating circularly polarized light in specific directions if the amplitudes and the phase relations are properly designed. First, theoretical calculations show that a silicon nanosphere illuminated with a linearly polarized plane wave radiates circularly polarized light at the wavelength in between the ED and MD resonances if the refractive index of a surrounding medium (nm) is ≈1.3; the ellipticity of the scattered light can be >0.99 when nm is in a 1.19–1.35
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Yao, Ruizhao, Sheng Lan, and Guangcan Li. "Mirror-coupled plasmonic nanostructures for enhanced in-plane magnetic dipole emission." Journal of Physics D: Applied Physics, September 20, 2024. http://dx.doi.org/10.1088/1361-6463/ad7d9d.

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Abstract Self-assembling of plasmonic nanoparticles into an oligomer can produce optical nanoantennas with resonant magnetic responses, which constituents a promising platform to study magnetic light-matter interactions on the nanoscale. However, these self-assembled magnetic nanostructures typically feature a flat-lying geometry configuration, giving rise to out-of-plane magnetic dipole moments that cannot couple to the far-field light efficiently. Herein, we proposed a new geometric configuration of plasmonic nanoantennas to realize in-plane magnetic dipole responses. This was achieved by el
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32

Bukharin, Mikhail M., Vladimir Ya Pecherkin, Anar K. Ospanova, et al. "Transverse Kerker effect in all-dielectric spheroidal particles." Scientific Reports 12, no. 1 (2022). http://dx.doi.org/10.1038/s41598-022-11733-4.

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AbstractKerker effect is one of the unique phenomena in modern electrodynamics. Due to overlapping of electric and magnetic dipole moments, all-dielectric particles can be invisible in forward or backward directions. In our paper we propose new conditions between resonantly excited electric dipole and magnetic quadrupole in ceramic high index spheroidal particles for demonstrating transverse Kerker effect. Moreover, we perform proof-of-concept microwave experiment and demonstrate dumbbell radiation pattern with suppressed scattering in both forward and backward directions and enhanced scatteri
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33

Chen, Xiaolin, Weiqing Gao, and Dangyuan Lei. "Giant broadband spin-selective asymmetric transmission and wavefront shaping in transition-metal-dichalcogenide-based chiral metasurfaces." Applied Physics Letters 124, no. 4 (2024). http://dx.doi.org/10.1063/5.0185546.

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Multidimensional spin-selective manipulation of optical waves is crucial for various intriguing applications in modern nanophotonics, such as quantum-information processing and chiral sensing and imaging. In this work, we observed giant broadband asymmetric transmission of circularly polarized waves and spin-preserving reflection, together with near-unity transmission circular dichroism, in a planar chiral metasurface composed of high-index transition-metal-dichalcogenide nanoantennas with large material anisotropy. The perpendicular and parallel electric and magnetic dipole moments excited in
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34

Zhou, Yong, Yujie Meng, Wuying Huang, Kuanguo Li, Zhenwei Wang, and Wanxia Huang. "Scattering characteristics of silicon nanoprisms: A theoretical investigation across monomeric to hexameric structures." AIP Advances 14, no. 2 (2024). http://dx.doi.org/10.1063/5.0191112.

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Dielectric nanostructures exhibit intriguing optical properties and outstanding advantages in designing optical nanoantennas and metasurfaces compared to plasmonic nanostructures. This study employs classical electrodynamic methods to comprehensively explore the scattering characteristics of silicon triangular nanoprisms in monomer and oligomer forms. For monomeric nanoprisms, the scattering spectra reveal two distinct and prominent resonance peaks attributed to magnetic dipole (MD) and electric dipole (ED) modes. Reducing interparticle gaps within dimeric structures leads to noticeable bluesh
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35

Mayoral Astorga, Luis Angel, Masoud Shabaninezhad, Howard Northfield, et al. "Electrically tunable plasmonic metasurface as a matrix of nanoantennas." Nanophotonics, February 27, 2024. http://dx.doi.org/10.1515/nanoph-2023-0796.

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Abstract We report the fabrication and characterization of a plasmonic metasurface comprising electrically-contacted sub-wavelength gold dipole nanoantennas, conformally coated by a thin hafnia film, an indium tin oxide layer and a backside mirror, forming metal–oxide–semiconductor (MOS) capacitors, for use as an electrically-tunable reflectarray or metasurface. By voltage biasing the nanoantennas through metallic connectors and leveraging the carrier refraction effect in the MOS capacitors, our measurements demonstrate phase control in reflection over a range of about 30°, with a constant mag
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Han, Zhanghua, Fei Ding, Yangjian Cai, and Uriel Levy. "Significantly enhanced second-harmonic generations with all-dielectric antenna array working in the quasi-bound states in the continuum and excited by linearly polarized plane waves." Nanophotonics, December 4, 2020. http://dx.doi.org/10.1515/nanoph-2020-0598.

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AbstractThe recently emerging all-dielectric optical nanoantennas based on high-index semiconductors have proven to be an effective and low-loss alternative to metal-based plasmonic structures for light control and manipulations of light–matter interactions. Nonlinear optical effects have been widely investigated to employ the enhanced interactions between incident light and the dielectrics at the Mie-type resonances, and in particular magnetic dipole resonances, which are supported by the semiconductor. In this paper, we explore the novel phenomenon of bound states in the continuum supported
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37

Ho, Jinfa, Zhaogang Dong, Hai Sheng Leong, et al. "Miniaturizing color-sensitive photodetectors via hybrid nanoantennas toward submicrometer dimensions." Science Advances 8, no. 47 (2022). http://dx.doi.org/10.1126/sciadv.add3868.

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Digital camera sensors use color filters on photodiodes to achieve color selectivity. As the color filters and photosensitive silicon layers are separate elements, these sensors suffer from optical cross-talk, which sets limits to the minimum pixel size. Here, we report hybrid silicon-aluminum nanostructures in the extreme limit of zero distance between color filters and sensors. This design could essentially achieve submicrometer pixel dimensions and minimize the optical cross-talk arising from tilt illuminations. The designed hybrid silicon-aluminum nanostructure has dual functionalities. Cr
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Moretti, Gianni Q., Emiliano Cortés, Stefan A. Maier, Andrea V. Bragas, and Gustavo Grinblat. "Engineering gallium phosphide nanostructures for efficient nonlinear photonics and enhanced spectroscopies." Nanophotonics, September 16, 2021. http://dx.doi.org/10.1515/nanoph-2021-0388.

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Abstract Optical resonances arising from quasi-bound states in the continuum (QBICs) have been recently identified in nanostructured dielectrics, showing ultrahigh quality factors accompanied by very large electromagnetic field enhancements. In this work, we design a periodic array of gallium phosphide (GaP) elliptical cylinders supporting, concurrently, three spectrally separated QBIC resonances with in-plane magnetic dipole, out-of-plane magnetic dipole, and electric quadrupole characters. We numerically explore this system for second-harmonic generation and degenerate four-wave mixing, demo
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39

Hong, Chuchuan, Ikjun Hong, Yuxi Jiang, and Justus C. Ndukaife. "Plasmonic Dielectric Antennas for Hybrid Optical Nanotweezing And Optothermoelectric Manipulation of Single Nanosized Extracellular Vesicles." Advanced Optical Materials, February 8, 2024. http://dx.doi.org/10.1002/adom.202302603.

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AbstractThis study showcases an experimental demonstration of near‐field optical trapping and dynamic manipulation of an individual extracellular vesicle. This is accomplished through the utilization of a plasmonic dielectric nanoantenna designed to support an optical anapole state—a non‐radiating optical state resulting from the destructive interference between electric and toroidal dipoles in the far‐field, leading to robust near‐field enhancement. To further enhance the field intensity associated with the optical anapole state, a plasmonic mirror is incorporated, thereby boosting trapping c
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40

García-Puente, Yalina, Jean-Jacques Laurin, and Raman Kashyap. "Experimental characterization of Spherical Bragg Resonators for electromagnetic emission engineering at microwave frequencies." Scientific Reports 13, no. 1 (2023). http://dx.doi.org/10.1038/s41598-023-47059-y.

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AbstractThis work reports experimental investigation and numerical validation of millimeter-sized Spherical Bragg Resonators (SBRs) fabricated using 3D printing technology. The frequency dependencies of the reflection and transmission coefficients were analyzed, and eigenfrequency values were calculated to examine the density of photonic states in air/PLA-polylactide SBRs, showing the appearance of an eigenmode and an increase in the local density of states in the core of a defect cavity. A decay rate enhancement of $${\sim 10}^{2}$$ ∼ 10 2 was obtained for a dipole placed in the core of the d
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