Disordered optical metasurfaces: from light manipulation to energy harvesting

Hu, Zixian; Liu, Changxu; Li, Guixin

doi:10.1080/23746149.2023.2234136

Cited by 4 publications

(3 citation statements)

References 149 publications

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“…More recently, however, the same net effect on the electromagnetic field was observed in partially ordered [ 29 ] and fully disordered structures [ 30 , 31 , 32 ], when the net effect on the electromagnetic field was resolved in terms of effective scattering properties rather than periodic unit cell effect replication. Such materials can be obtained by immersing Janus nanoparticles [ 33 ], which can exhibit a negative electric permittivity, in a positively valued permittivity host medium, such as nematic liquid crystals [ 34 , 35 , 36 ], coatings [ 37 ], and thin film structures [ 38 ].…”

Section: Introductionmentioning

confidence: 84%

Mixing Rules for Left-Handed Disordered Metamaterials: Effective-Medium and Dispersion Properties

Bărar,

Maclean,

Gross

et al. 2024

Nanomaterials

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Left-handed materials are known to exhibit exotic properties in controlling electromagnetic fields, with direct applications in negative reflection and refraction, conformal optical mapping, and electromagnetic cloaking. While typical left-handed materials are constructed periodic metal-dielectric structures, the same effect can be obtained in composite guest–host systems with no periodicity or structural order. Such systems are typically described by the effective-medium approach, in which the components of the electric permittivity tensor are determined as a function of individual material properties and doping concentration. In this paper, we extend the discussion on the mixing rules to include left-handed composite systems and highlight the exotic properties arising from the effective-medium approach in this framework in terms of effective values and dispersion properties.

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Section: Introductionmentioning

confidence: 84%

Mixing Rules for Left-Handed Disordered Metamaterials: Effective-Medium and Dispersion Properties

Bărar,

Maclean,

Gross

et al. 2024

Nanomaterials

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“…While nanostructures with gaps, sharp tip/connection, and nanorods exhibit a strong dependence on the polarization of incident light, core–shell structures and disks struggle to adjust resonance without altering their physical cross section. Singular plasmonic structures , provide a strong response within a broadband region but are sensitive to polarization, whereas random plasmonic metasurfaces − offer a broadband response but lack tunability of the resonance. The strategy of void filling can lead to strong light–matter interactions with feasible resonance tunability.…”

mentioning

confidence: 99%

“…Therefore, while the Mie model provides initial guidance, further investigation, including numerical simulations, may be necessary for practical design when disorder is inevitable. Disorder in the system can broaden the bandwidth of the optical response, ,, offering advantages for specific applications such as photovoltaics and photocatalysis. The modeling and simulations does not include the influence of nanoscale electromagnetism, , prompting further investigation of nonlocal effects and electron tunneling for the proposed nanoparticles.…”

mentioning

confidence: 99%

Enhanced Light–Matter Interaction in Metallic Nanoparticles: A Generic Strategy of Smart Void Filling

Liu,

Wu,

Lalanne

et al. 2024

Nano Lett.

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The intrinsic properties of materials play a substantial role in light−matter interactions, impacting both bulk metals and nanostructures. While plasmonic nanostructures exhibit strong interactions with photons via plasmon resonances, achieving efficient light absorption/scattering in other transition metals remains a challenge, impeding various applications related to optoelectronics, chemistry, and energy harvesting. Here, we propose a universal strategy to enhance light−matter interaction, through introducing voids onto the surface of metallic nanoparticles. This strategy spans nine metals including those traditionally considered optically inactive. The absorption cross section of void-filled nanoparticles surpasses the value of plasmonic (Ag/Au) counterparts with tunable resonance peaks across a broad spectral range. Notably, this enhancement is achieved under arbitrary polarizations and varied particle sizes and in the presence of geometric disorder, highlighting the universal adaptability. Our strategy holds promise for inspiring emerging devices in photocatalysis, bioimaging, optical sensing, and beyond, particularly when metals other than gold or silver are preferred.

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