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        <title>Frontiers in Photonics | Plasmonics section | New and Recent Articles</title>
        <link>https://www.frontiersin.org/journals/photonics/sections/plasmonics</link>
        <description>RSS Feed for Plasmonics section in the Frontiers in Photonics journal | New and Recent Articles</description>
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        <pubDate>2026-05-12T22:40:09.386+00:00</pubDate>
        <ttl>60</ttl>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphot.2025.1548555</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphot.2025.1548555</link>
        <title><![CDATA[Large first hyperpolarizability of the Au@Ag core-shell nanoparticles as compared to the corresponding alloyed nanoparticles resulting from laser annealing]]></title>
        <pubdate>2025-03-03T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Isabelle Russier-Antoine</author><author>Christian Jonin</author><author>Emmanuel Benichou</author><author>Franck Bertorelle</author><author>Pierre-François Brevet</author>
        <description><![CDATA[In this work, the first hyperpolarizability of Aux@Ag100-x core-shell nanoparticles with x the gold molar fraction in percent and the gold core of which is 12 nm in diameter, is determined and compared to that of their corresponding laser annealed nanoparticles using hyper Rayleigh scattering experiments. Laser annealing transforms the initially composite Aux@Ag100-x core-shell nanoparticles into alloyed AuxAg100-x homogeneous nanoparticles, providing a reference for comparison. It is observed that the evolution with the relative molar ratio between gold and silver of the first hyperpolarizability magnitude of both the Aux@Ag100-x core-shell and the alloyed AuxAg100-x nanoparticles is driven by the SPR resonance enhancement occurring at the harmonic wavelength due to red shifting of the SPR band away from the harmonic wavelength. Furthermore, the first hyperpolarizability magnitude of the Aux@Ag100-x core-shell nanoparticles is found to be about three orders of magnitude larger than that of the annealed alloyed AuxAg100-x nanoparticles. This feature may be attributed to the existence of the two nonlinearities, namely, the surface nonlinearity due to the surrounding medium–silver layer interface and the silver–gold metal - metal interface constructively contributing due to their close localization. The core-shell morphology is thus highly beneficial in view of applications as compared to the alloyed one.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphot.2023.1270553</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphot.2023.1270553</link>
        <title><![CDATA[Editorial: Advances in plasmonics: a European collection]]></title>
        <pubdate>2023-08-24T00:00:00Z</pubdate>
        <category>Editorial</category>
        <author>Michele Ortolani</author><author>Cristian Ciracì</author><author>Maria Caterina Giordano</author><author>Stefania D'Agostino</author>
        <description></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphot.2023.1193479</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphot.2023.1193479</link>
        <title><![CDATA[Adaptive plasmonic metasurfaces for radiative cooling and passive thermoregulation]]></title>
        <pubdate>2023-06-30T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Azadeh Didari-Bader</author><author>Nooshin M. Estakhri</author><author>Nasim Mohammadi Estakhri</author>
        <description><![CDATA[In this work, we investigate a class of planar photonic structures operating as passive thermoregulators. The radiative cooling process is adjusted through the incorporation of a phase change material (Vanadium Dioxide, VO2) in conjunction with a layer of transparent conductive oxide (Aluminum-doped Zinc Oxide, AZO). VO2 is known to undergo a phase transition from the “dielectric” phase to the “plasmonic” or “metallic” phase at a critical temperature close to 68°C. In addition, AZO shows plasmonic properties at the long-wave infrared spectrum, which, combined with VO2, provides a rich platform to achieve low reflections across the atmospheric transparency window, as demanded in radiative cooling applications, while also maintaining a compact size. Using numerical analysis, we study two classes of patterned and non-patterned compact multilayer metal-dielectric-metal metasurfaces, aiming to maximize the overall absorption in the first atmospheric transparency window (8–13 µm) while maintaining a high reflection across the solar spectrum (0.3–2.5 µm). Surfaces are initially designed based on a round of coarse optimization and further improved through analyzing the impact of geometric parameters such as size and periodicity of the metasurface elements. Our findings are relevant to applications in thermal regulation systems and passive radiative cooling of high-temperature devices, such as electronic elements.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphot.2023.1213434</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphot.2023.1213434</link>
        <title><![CDATA[On-chip liquid sensing using mid-IR plasmonics]]></title>
        <pubdate>2023-06-27T00:00:00Z</pubdate>
        <category>Mini Review</category>
        <author>B. Hinkov</author><author>M. David</author><author>G. Strasser</author><author>B. Schwarz</author><author>B. Lendl</author>
        <description><![CDATA[The investigation of molecules in the mid-IR spectral range has revolutionized our understanding in many fields such as atmospheric chemistry and environmental sensing for climate research or disease monitoring in medical diagnosis. While the mid-IR analysis of gas-samples is already a mature discipline, the spectroscopy of liquids is still in its infancy. However, it is a rapidly developing field of research, set to fundamentally change our knowledge of dynamical processes of molecules in liquid-phase. In this field, mid-IR plasmonics has emerged as breakthrough concept for miniaturization, enabling highly-sensitive and -selective liquid measurement tools. In this review, we give an overview over current trends and recent developments in the field of mid-IR spectroscopy of molecules in liquid phase. Special attention is given to plasmon-enhanced concepts that allow measurements in highly compact sensor schemes. Nowadays, they reach full monolithic integration, including laser, interaction section and detector on the same chip, demonstrating unprecedented operation in situ and real-time analysis of chemical processes.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphot.2023.1199598</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphot.2023.1199598</link>
        <title><![CDATA[Fully atomistic modeling of plasmonic bimetallic nanoparticles: nanoalloys and core-shell systems]]></title>
        <pubdate>2023-06-16T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Luca Nicoli</author><author>Piero Lafiosca</author><author>Pablo Grobas Illobre</author><author>Luca Bonatti</author><author>Tommaso Giovannini</author><author>Chiara Cappelli</author>
        <description><![CDATA[The recently developed ωFQFμ model (ACS Photonics, 9, 3,025–3,034) is extended to bimetallic nanoparticles, such as nanoalloys and core-shell systems. The method finds its grounds in basic physical concepts, such as Drude conduction theory, electrostatics, interband transitions, and quantum tunneling. The approach, which is parametrized on ab initio simulations of Ag-Au nanoalloys, is challenged against complex Ag-Au nanostructures (spheres, nanorods, and core-shell nanoparticles). Remarkable agreement with available experimental data is found, thus demonstrating the reliability of the newly developed approach.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphot.2023.1199411</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphot.2023.1199411</link>
        <title><![CDATA[High spatial resolution imaging of light localization in hyperuniform disordered patterns of circular air pores in a dielectric slab]]></title>
        <pubdate>2023-06-14T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Nicoletta Granchi</author><author>Richard Spalding</author><author>Kris Stokkereit</author><author>Matteo Lodde</author><author>Maurangelo Petruzzella</author><author>Frank V. Otten</author><author>Riccardo Sapienza</author><author>Andrea Fiore</author><author>Marian Florescu</author><author>Francesca Intonti</author>
        <description><![CDATA[Hyperuniform disordered photonic structures are a peculiar category of disordered photonic heterostructures located between random structures and ordered photonic crystals. These materials, thanks to the presence of a photonic bandgap, exhibit the advantages of random and ordered structures since they have been shown to support in a small spatial footprint a high density of Anderson-localized modes, which naturally occur at the bandgap edges with peculiar features like relatively high Q/V ratios. Different localization behaviors have been recently reported in hyperuniform disordered luminescent materials, with a well-established and widely studied design, based on disordered networks. Here, we explore an alternative design, based on circular holes of different sizes hyperuniformely distributed, that we investigate theoretically and experimentally by means of scanning near-field optical microscopy. We report that the spectral features of hyperuniform disordered networks can also be extended to a different design, which, in turn, displays pseudo-photonic bandgaps and light localization. The ability of generating different kinds of hyperuniform disordered photonic systems that share the same theoretical and experimental optical features can largely extend practical potentialities and integration in many optoelectronic applications.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphot.2023.1175033</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphot.2023.1175033</link>
        <title><![CDATA[Time-resolved investigation of nanometric cell membrane patches with a mid-infrared laser microscope]]></title>
        <pubdate>2023-04-28T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Antonia Intze</author><author>Maria Eleonora Temperini</author><author>Leonetta Baldassarre</author><author>Valeria Giliberti</author><author>Michele Ortolani</author><author>Raffaella Polito</author>
        <description><![CDATA[The proton pump Bacteriorhodopsin (BR) undergoes repeated photocycles including reversible conformational changes upon visible light illumination. Exploiting the sensitivity of infrared (IR) spectra to the conformation, we have determined the reaction kinetic parameters of the conductive intermediate M for the wild-type protein and for its slow mutant D96N during its photocycle. Time-resolved IR micro-spectroscopy using an in-house developed confocal laser microscope operating in the mid-IR is employed to record absorption changes of 10−4 at wavelengths λ1 = 6.08 μm and λ2 = 6.35 μm, assigned to backbone and retinal structural modifications, respectively. Protein samples were embedded in dried lipid bilayers deposited on ultraflat gold supports to enhance the surface field. The signals were analyzed according to a simplified photocycle model with only two dominant states: the dark-adapted state BR* and the intermediate M. We obtained the excitation and relaxation times of the intermediate M from exponential fits to the absorption change time traces. Our results constitute a first step towards future plasmonic-assisted nanoscale time-resolved mid-IR spectrometers for the characterization of bioelectronic and light-harvesting nanodevices based on BR.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphot.2023.1067916</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphot.2023.1067916</link>
        <title><![CDATA[Plasmonics for microwave photonics in the THz range]]></title>
        <pubdate>2023-04-13T00:00:00Z</pubdate>
        <category>Mini Review</category>
        <author>Maurizio Burla</author><author>Claudia Hoessbacher</author><author>Wolfgang Heni</author><author>Christian Haffner</author><author>Yannick Salamin</author><author>Yuriy Fedoryshyn</author><author>Tatsuhiko Watanabe</author><author>Hermann Massler</author><author>Tobias Blatter</author><author>Yannik Horst</author><author>Delwin L. Elder</author><author>Larry R. Dalton</author><author>Juerg Leuthold</author>
        <description><![CDATA[THz frequencies offer enormous amounts of bandwidth, which could solve the current speed bottleneck for next-generation wireless communications. Recent reports show sub-THz links offering capacities of hundreds of Gbit/s, finally approaching those of state-of-the-art optical transmission channels. Non-etheless, generation, transport, detection and processing of signals in the THz range is far from being a trivial task. Even though the recent evolution of integrated technology is starting to indicate that chip-scale THz technology could gradually close the so-called “THz gap,” much work still needs to be done to enable functional systems, in particular in terms of efficiency. Photonics can be of help, thanks to its extremely low loss and broad bandwidth. Yet, a particularly critical aspect hindering the deployment of THz technology is that state-of-the-art photonics devices generally do not offer sufficient electro-optical bandwidth to process THz signals. Plasmonics, by focusing electromagnetic surface waves at sub-wavelength scales, can play a key role in this quest, as it finally enables the realization of electro-optical devices such as modulators and detectors displaying sufficient compactness and speeds to reach the THz range. This paper overviews recent achievements on plasmonic-based modulators displaying characteristics of speed, efficiency and linearity that enable high-performance access to this much desired frequency range.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphot.2022.989570</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphot.2022.989570</link>
        <title><![CDATA[Plasmonics for advance single-molecule fluorescence spectroscopy and imaging in biology]]></title>
        <pubdate>2022-08-17T00:00:00Z</pubdate>
        <category>Mini Review</category>
        <author>Cecilia Zaza</author><author>Sabrina Simoncelli</author>
        <description><![CDATA[The elucidation of complex biological processes often requires monitoring the dynamics and spatial organization of multiple distinct proteins organized on the sub-micron scale. This length scale is well below the diffraction limit of light, and as such not accessible by classical optical techniques. Further, the high molecular concentrations found in living cells, typically in the micro- to mili-molar range, preclude single-molecule detection in confocal volumes, essential to quantify affinity constants and protein-protein reaction rates in their physiological environment. To push the boundaries of the current state of the art in single-molecule fluorescence imaging and spectroscopy, plasmonic materials offer encouraging perspectives. From thin metallic films to complex nano-antenna structures, the near-field electromagnetic coupling between the electronic transitions of single emitters and plasmon resonances can be exploited to expand the toolbox of single-molecule based fluorescence imaging and spectroscopy approaches. Here, we review two of the most current and promising approaches to study biological processes with unattainable level of detail. On one side, we discuss how the reduction of the fluorescence lifetime of a molecule as it approaches a thin metallic film can be exploited to decode axial information with nanoscale precision. On the other, we review how the tremendous progress on the design of plasmonic antennas that can amplify and confine optical fields at the nanoscale, powered a revolution in fluorescence correlation spectroscopy. Besides method development, we also focus in describing the most interesting biological application of both technologies.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphot.2022.969233</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphot.2022.969233</link>
        <title><![CDATA[Plasmonics: The future is ultrafast and ultrasmall]]></title>
        <pubdate>2022-08-17T00:00:00Z</pubdate>
        <category>Specialty Grand Challenge</category>
        <author>Michele Celebrano</author>
        <description></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphot.2020.621510</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphot.2020.621510</link>
        <title><![CDATA[Plasmonics: Future and Challenges]]></title>
        <pubdate>2020-11-30T00:00:00Z</pubdate>
        <category>Specialty Grand Challenge</category>
        <author>Vincenzo Giannini</author>
        <description></description>
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