Collective Resonances of Lossy Material Nanoantennas

Karimi, Vahid; Babicheva, Viktoriia E.

doi:10.1109/nano51122.2021.9514325

Cited by 2 publications

(3 citation statements)

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“…The absorption and scattering cross-sections of a single spherical MXene antenna are calculated using Mie theory, as described in refs and . In Figure , the absorption, red scattering, and extinction cross-section efficiencies are plotted as a function of wavelength λ (in free space) and antenna size.…”

Section: Resultsmentioning

confidence: 99%

“…The overall behavior of an array is primarily determined by the collective properties of its constituent elements. This implies that the characteristics of individual antennas have a lesser influence on the array’s behavior. , Processing Ti 3 C 2 T x materials is very challenging and requires developing a number of steps, and instead, we perform proof-of-concept experimental measurements of titanium array on the silica substrate in the near-infrared range. Figure shows the experimental demonstration of the lattice resonance in the array of titanium antennas (see the Methods section).…”

Section: Resultsmentioning

confidence: 99%

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Multipole Mie Resonances in MXene-Antenna Arrays

Karimi,

Babicheva

2023

J. Phys. Chem. C

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Our research focuses on studying the multipole Mie resonances that are excited within the antennas of transition-metal carbides and nitrides (MXenes), particularly focusing on Ti3C2T x MXene as an array component. Through analytical models, numerical simulations, and experimental characterizations, we explore how collective resonances of the lossy nanostructures, such as MXene or lossy metals, lead to absorption enhancement, reflection suppression, and 2π variations of phase for the transmitted signal. Analytical models provide insights into the nature of the optical resonances excited in the antenna array, allowing for the identification of the strongest multipole and designing the antenna array accordingly. This study presents experimental measurements of the near-infrared reflection from a titanium antenna array, highlighting the emergence of a generalized Kerker effect due to multipole scattering compensation. The well-pronounced and optically responsive collective multipole resonances in nanostructured MXene enable metasurfaces with broad bandwidth absorption, using its large permittivity and scattering enhancement to improve light conversion efficiency in large-scale energy-harvesting systems.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Multipole Mie Resonances in MXene-Antenna Arrays

Karimi,

Babicheva

2023

J. Phys. Chem. C

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“…As a result, the properties of individual antennas have less of an impact on the array's behavior. 75,76 In the case of the Ti lattice, the measurements show a substantial transmission decrease next to the Rayleigh anomaly, corresponding to the collective resonances of the array. This phenomenon is caused by the constructive interference of the scattered fields from individual antennas.…”

Section: Narrowband Photodetectormentioning

confidence: 94%