Multifrequency superscattering with high 
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 factors from a deep-subwavelength spoof plasmonic structure

Wu, Hong‐Wei; Fang, Yu; Quan, Jia-Qi; Han, Yizeng; Yin, Yin; Li, Yang; Sheng, Zong-Qiang

doi:10.1103/physrevb.100.235443

Cited by 19 publications

(14 citation statements)

References 38 publications

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“…(d) Magnetic spoof LSP metasurface [83]. (e) Single spiral spoof LSP metasurface [34]. (f) Logarithmic spiral spoof LSP metasurface [33].…”

Section: B Analogous Eit In Ghz Bandsmentioning

confidence: 99%

“…Ref. [33] and [34] report the theoretical and experimental designs, respectively, as shown in Fig. 6(e) and (f).…”

Section: B Analogous Eit In Ghz Bandsmentioning

confidence: 99%

“…The strong coupling system can generate a very sharp peak in the spectrum, accompanied by abrupt phase changes [26], [27]. Recent researches show the possible realization of multiple EIT-like transmissions [30]- [32] and the EIT-like behavior in a single resonator [33], [34]. Due to the similarity of the spectrum of the coupling system and that of the quantum EIT behavior, we can denote these classical systems as EIT-like systems.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Metamaterials With Analogous Electromagnetically Induced Transparency and Related Sensor Designs—A Review

Wang

Liu

et al. 2023

IEEE Sensors J.

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Electromagnetically induced transparency (EIT) originates from quantum physics, where a narrow transparent peak appears in the opaque band due to the destructive interference between quantum states of atoms and molecules. Similar phenomena can be realized based on strong-coupling resonators with a similar spectrum of transmission peaks and abrupt dispersion variations. These classical systems, ranging from elastic to optical, are named analogs of EIT. The sharp resonant peaks with high-quality factors in the spectrum exhibit powerful potentials in sensors with ultra-high sensitivity. In order to better understand the development history of EIT-like metamaterials and their specific applications in the field of sensors, this paper makes a brief review of the EIT-like phenomenon in metamaterials. Firstly, we conduct the universal mathematical formulation based on the coupling oscillator model. Then, we classify specific metamaterial designs and practical applications of EIT-like devices in acoustic, electromagnetic, and optical waves, respectively. We also summarize the recent technologies of dynamic modulations of EIT-like metamaterials and discuss future research directions.

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“…(d) Magnetic spoof LSP metasurface [83]. (e) Single spiral spoof LSP metasurface [34]. (f) Logarithmic spiral spoof LSP metasurface [33].…”

Section: B Analogous Eit In Ghz Bandsmentioning

confidence: 99%

“…Ref. [33] and [34] report the theoretical and experimental designs, respectively, as shown in Fig. 6(e) and (f).…”

Section: B Analogous Eit In Ghz Bandsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Metamaterials With Analogous Electromagnetically Induced Transparency and Related Sensor Designs—A Review

Wang

Liu

et al. 2023

IEEE Sensors J.

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“…where S m is the scattering coefficient of the m th angular momentum channel, λ is the wavelength of light in free space, and n is the refractive index of the surrounding environment 2 (Supplementary Note 1). In a passive system, one can rigorously prove that the scattering cross section from each individual channel is bounded by |S m | ≤ 1, referred to as the single-channel scattering limit [3][4][5][6] . A similar limit also exists in three-dimensional (3D) situations 7,8 .…”

mentioning

confidence: 99%

Breaking the fundamental scattering limit with gain metasurfaces

et al. 2022

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A long-held tenet in physics asserts that particles interacting with light suffer from a fundamental limit to their scattering cross section, referred to as the single-channel scattering limit. This notion, appearing in all one, two, and three dimensions, severely limits the interaction strength between all types of passive resonators and photonic environments and thus constrains a plethora of applications in bioimaging, sensing, and photovoltaics. Here, we propose a route to overcome this limit by exploiting gain media. We show that when an excited resonance is critically coupled to the desired scattering channel, an arbitrarily large scattering cross section can be achieved in principle. From a transient analysis, we explain the formation and relaxation of this phenomenon and compare it with the degeneracy-induced multi-channel superscattering, whose temporal behaviors have been usually overlooked. To experimentally test our predictions, we design a two-dimensional resonator encircled by gain metasurfaces incorporating negative- resistance components and demonstrate that the scattering cross section exceeds the single- channel limit by more than 40-fold. Our findings verify the possibility of stronger scattering beyond the fundamental scattering limit and herald a novel class of light-matter interactions enabled by gain metasurfaces.

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“…Recently, increased interest in optical imaging, sensing, and energy harvesting at nanoscales has attracted renewed interest in the research of light scattering on the capability of engineering scattering spectra at will. Control of light scattering is shown in two extreme scattering anomalies: superscattering [6][7][8][9][10][11][12][13][14] and invisibility (cloak) [15][16][17][18][19][20][21][22][23][24][25][26]. Superscattering, which demonstrates an extraordinarily large scattering cross section (CS) far greater than that of the single-channel limit, has practical significance for applications such as imaging, biomedicine, and photovoltaics [3].…”

mentioning

confidence: 99%

Deep-learning-enabled inverse engineering of multi-wavelength invisibility-to-superscattering switching with phase-change materials

Luo

Zhang

et al. 2021

Opt. Express

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Inverse design of nanoparticles for desired scattering spectra and dynamic switching between the two opposite scattering anomalies, i.e. superscattering and invisibility, is an interesting topic in nanophotonics. However, traditionally the design process is quite complicated, which involves complex structures with many choices of synthetic constituents and dispersions. Here, we demonstrate that a well-trained deep-learning neural network can handle these issues efficiently, which can not only forwardly predict scattering spectra of multilayer nanoparticles with high precision, but also inversely design the required structural and material parameters quite efficiently. Moreover, we show that the neural network is capable of finding out multiwavelength invisibility-to-superscattering switching points at the desired wavelengths in multilayer nanoparticles composed of metals and phase-change materials. Our work paves a way of deep learning for the inverse design of nanoparticles with desired scattering spectra.

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Multifrequency superscattering with high Q factors from a deep-subwavelength spoof plasmonic structure

Cited by 19 publications

References 38 publications

Metamaterials With Analogous Electromagnetically Induced Transparency and Related Sensor Designs—A Review

Metamaterials With Analogous Electromagnetically Induced Transparency and Related Sensor Designs—A Review

Breaking the fundamental scattering limit with gain metasurfaces

Deep-learning-enabled inverse engineering of multi-wavelength invisibility-to-superscattering switching with phase-change materials

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