Article
Chemistry, Physical
Min Xi, Cui Liu, Nian Li, Shudong Zhang, Zhenyang Wang
Summary: The coupled plasmonic modes of noble metal nanoparticles, specifically the dipole-multipole coupling in asymmetric dimers of Au NRs, were systematically investigated through electromagnetic simulations. The study focused on the hybridization between different resonances and the effects of gap space and dipole orientation. It was found that the parallel aligned D-M plasmonic hybridization led to asymmetric split resonances, with different energy levels for the multipolar and dipolar resonances. The work has important implications for understanding and utilizing the D-M plasmonic hybridization system in various applications.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Optics
Yue Zhang, Tao Xiong, Dandan Dong, Wei Wang, Cheng Sun
Summary: This study investigates the plasmonic properties of a symmetry-breaking system composed of rhodium dual broken nanorings in the ultraviolet-visible regime. By varying the separation, light polarization, and relative orientation of the broken angles, the plasmonic scattering efficiency is examined using the finite difference time domain method. Multiple plasmonic resonances are discovered, and their asymmetry-induced Fano-like lineshapes are fitted to a model employing multiple Fano lineshape functions. The resonance wavelengths, spectral widths, and characteristic q values are determined, providing quantitative insights into the plasmonic characteristics of the system. The findings of this study have potential implications for the design of plasmonic devices operating at ultraviolet-visible wavelengths.
APPLIED PHYSICS B-LASERS AND OPTICS
(2023)
Article
Optics
Gui-Ming Pan, Li-Feng Yang, Fang-Zhou Shu, Yan-Long Meng, Zhi Hong, Zhong-Jian Yang
Summary: This study demonstrates that the interaction between magnetic dipole emitters and silver oligomers can excite anapole states with unique properties, effectively suppressing radiative power and providing an ideal platform for studying non-radiative transitions. These findings introduce magnetic anapoles to plasmonics and open up new possibilities for the development of high-performance magnetic-dipole-based optoelectronic devices.
PHOTONICS RESEARCH
(2022)
Article
Chemistry, Physical
Min Huang, Xian Wang, Guanjie Xing, Chenchen Meng, Yunchao Li, Xiaohong Li, Louzhen Fan, Yan Wan, Shihe Yang
Summary: This study demonstrates the enhanced oxygen evolution reaction (OER) by CuS nanodisks (NDs) under illumination, achieved by generating abundant hot holes through localized surface plasmon resonance (LSPR) damping. This marks the first report on direct utilization of plasmonic hot holes in CuS nanomaterials to boost OER performance, providing a new pathway for designing NIR-active photocatalysts/electrocatalysts based on unique LSPR properties.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Tingting Lin, Tianyi Yang, Yuhang Cai, Jingwei Li, Guangxiang Lu, Shuangqun Chen, Yi Li, Liang Guo, Stefan A. Maier, Changxu Liu, Jianfeng Huang
Summary: Inspired by transformation optics, we propose a new concept for plasmonic photocatalysis by creating a novel hybrid nanostructure with a plasmonic singularity. Our geometry enables broad and strong spectral light harvesting at the active site of a nearby semiconductor where the chemical reaction occurs. The insights gained from this work might be beneficial for designing efficient composite plasmonic photocatalysts for diverse photocatalytic reactions.
Review
Chemistry, Multidisciplinary
Bin Ai, Yujing Sun, Yiping Zhao
Summary: This review provides an overview of plasmonic hydrogen sensors (PHS) based on nanostructures. PHS offer high sensitivity, fast response speed, miniaturization, and high-degree of integration. The review discusses the working principle, sensing properties, and the effects of resonance mode, configuration, material, and structure on the sensing performances. It also summarizes the advantages and disadvantages of different types of plasmonic nanostructures and proposes potential development directions. The aim of this review is to clarify current strategies for PHS and provide a comprehensive understanding of their working principle to inspire innovative designs and execution of advanced hydrogen sensors.
Article
Engineering, Electrical & Electronic
Jiang Jing, Liang Mingli, Li Jiaying
Summary: In this paper, the authors use the theory of transformation optics to extend plasmonic Fano resonances in a core-shell nanoparticle system for novel biosensing and optical switching applications. The results showed that breaking the geometrical symmetry of the structure leads to multiple Fano resonances through near-field coupling of bright and dark resonant modes. The proposed nanostructure has promise for applications such as multiwavelength biosensing, switching, and modulation.
CHINESE JOURNAL OF ELECTRONICS
(2023)
Article
Physics, Applied
Lei Kang, Joshua A. Robinson, Douglas H. Werner
Summary: This study demonstrates the highly sensitive refractive index sensing of nano-engineered ultrathin 2D-metal films supporting infrared plasmons. The plasmonic resonances observed on nano-ribbons and nanoribbons exhibit strong refractive index sensitivity, which is of great significance for the development of nanoscale optical sensors.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Applied
E. Mejia, Y. Qian, S. A. Safiabadi Tali, J. Song, W. Zhou
Summary: The study demonstrates that fixed-size tapered nanolaminate nanoantennas can achieve wide double-resonance spectral tunability by changing the metal-to-insulator thickness ratio. Experimental results show that these antennas can support tunable resonant wavelengths and exhibit great performance in terms of electromagnetic responses.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Chuhua Wu, Zicong Guo, Shuxian Chen, Jun Yang, Kunhua Wen
Summary: In this study, a coupled plasmonic resonant system using a metal-insulator-metal (MIM) waveguide is proposed to generate multiple Fano resonances. By employing the multi-mode interference coupled-mode theory (MICMT), the system is analyzed theoretically and numerically validated with the finite-difference time-domain (FDTD) method. The designed structures show great potential for high integrated optical circuits of chip-scale optical sensors, slow light devices, or splitters, with the ability to manipulate Fano peaks through adjusting the parameters of the defective ring cavity.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Shunsheng Ye, Huaining Zha, Yifan Xia, Wenhao Dong, Fan Yang, Chenglin Yi, Jing Tao, Xiaoxue Shen, Dong Yang, Zhihong Nie
Summary: This article presents a bottom-up strategy to precisely organize and orient plasmonic molecules on substrates using a combination of directional capillary force and supporting polymer film. The resulting superlattices exhibit highly tunable collective optical properties, making them suitable for advanced plasmonic devices.
Article
Chemistry, Physical
Ke An, Jingtian Hu, Jianfang Wang
Summary: Plasmonic photocatalysis has attracted attention in enhancing solar-to-chemical conversion efficiency. However, current plasmonic photocatalysts have limited efficiency due to rapid recombination and the Schottky barrier. A new type of plasmonic photocatalyst, the Schottky-barrier-free plasmonic photocatalyst, has been proposed to overcome these limitations.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Optics
Zhiwei Hu, Ximin Cui, Yang Li, Xiaobo Han, Huatian Hu
Summary: This study numerically demonstrates a simple plasmonic nanocube-hexagonal-nanoplate heterodimer that exhibits a strong, tunable self-induced transparency window. It also observes multiple exciton-induced transparency windows. These findings are important for understanding and manipulating light-matter interactions.
Article
Chemistry, Multidisciplinary
Feifei Zhang, Jerome Plain, Davy Gerard, Jerome Martin
Summary: This study numerically investigates the influence of surface roughness on the plasmonic properties of aluminum nanodisks, revealing different effects on the out-of-plane quadrupolar mode and in-plane dipolar mode. The results show that increasing surface roughness significantly dampens the quadrupolar mode while broadening and redshifting the dipolar resonance. These effects are attributed to the decoherence and dissipation of electronic oscillations due to surface roughness, and are experimentally confirmed by characterizing the optical properties of periodic aluminum nanodisk arrays.
Article
Chemistry, Physical
Min Xi, Cui Liu, Nian Li, Shudong Zhang, Zhenyang Wang
Summary: Plasmonic hybridization in complex nanostructures is studied in this manuscript, comparing the similarities of different building blocks and analyzing the effects of separation and coupling. The research contributes to the fundamental understanding of plasmonic hybridization systems and opens up new possibilities in the fields of plasmonic-photonics and nanoplasmonics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Lucca Kuehner, Luca Sortino, Benjamin Tilmann, Thomas Weber, Kenji Watanabe, Takashi Taniguchi, Stefan A. Maier, Andreas Tittl
Summary: All-dielectric optical metasurfaces with high-Q resonances throughout the visible spectrum have been achieved by leveraging symmetry-broken quasi bound states in the continuum (qBICs). These qBIC resonances effectively suppress radiation losses, allowing for the use of low-index van der Waals materials such as hexagonal boron nitride (hBN). The experimental results also demonstrated enhanced second-harmonic generation using the high-Q resonances.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Allison R. Pessoa, Jefferson A. O. Galindo, Luiz F. dos Santos, Rogeria R. Goncalves, Stefan A. Maier, Leonardo de S. Menezes, Anderson M. Amaral
Summary: Lanthanide-doped single dielectric nanoparticles are used for nanoscale temperature sensing with high resolution. However, the low number of emitters in individual nanocrystals requires higher excitation power densities, which can cause overlapping emissions and affect temperature measurements. This study demonstrates a method to separate and correct these overlapping bands, resulting in improved temperature readout accuracy and corrected thermal artifacts.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Review
Optics
Andrea V. Bragas, Stefan A. Maier, Hilario D. Boggiano, Gustavo Grinblat, Rodrigo Bertc, Leonardo De S. Menezes, Emiliano Cortes
Summary: In this work, the physics of nanoresonators and their acoustic vibrations are reviewed, with frequencies in the range of a few to tens of GHz. Accurate determination of their oscillation frequencies allows them to act as mechanical nanoprobes, measuring local mechanical moduli and performing high-resolution imaging. The damping mechanisms and the role of the substrate are also discussed when nanoresonators are integrated into platforms and probed individually. The importance of manipulating hypersonic surface acoustic waves with nanoantennas and their potential applications in acousto-plasmonic devices operating in the GHz range and at nanoscale is also emphasized.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Tingting Lin, Tianyi Yang, Yuhang Cai, Jingwei Li, Guangxiang Lu, Shuangqun Chen, Yi Li, Liang Guo, Stefan A. Maier, Changxu Liu, Jianfeng Huang
Summary: Inspired by transformation optics, we propose a new concept for plasmonic photocatalysis by creating a novel hybrid nanostructure with a plasmonic singularity. Our geometry enables broad and strong spectral light harvesting at the active site of a nearby semiconductor where the chemical reaction occurs. The insights gained from this work might be beneficial for designing efficient composite plasmonic photocatalysts for diverse photocatalytic reactions.
Article
Chemistry, Multidisciplinary
Maria Sanz-Paz, Fangjia Zhu, Nicolas Bruder, Karol Kolataj, Antonio I. Fernandez-Dominguez, Guillermo P. Acuna
Summary: By modifying the local density of photonic states, optical nanoantennas can alter the emission spectrum of a dye. In this study, DNA origami was used to precisely position an individual dye around a gold nanorod and observe how it affects the emission spectrum. The spectral overlap between the nanorod resonance and different vibrational levels of the dye's excitonic ground state can lead to strong suppression or enhancement of transitions.
Article
Chemistry, Multidisciplinary
Xiaofei Xiao, Raymond Gillibert, Antonino Foti, Pierre-Eugene Coulon, Christian Ulysse, Tadzio Levato, Stefan A. . Maier, Vincenzo Giannini, Pietro Giuseppe Gucciardi, Giancarlo Rizza
Summary: Surface-enhanced Raman optical activity (SEROA) has been extensively studied for its ability to directly probe the stereochemistry and molecular structure. This study presents a strategy for achieving a similar effect by coupling optically inactive molecules with the chiral plasmonic response of metasurfaces, resulting in a surface-enhanced Raman polarization rotation effect. This technique extends the potential of Raman optical activity to inactive molecules and enhances the sensitivity performances of surface-enhanced Raman spectroscopy, without the heating issue present in traditional plasmonic-enhanced ROA techniques.
Article
Chemistry, Multidisciplinary
Rodrigo Berte, Thomas Weber, Leonardo de Souza Menezes, Lucca Kuehner, Andreas Aigner, Martin Barkey, Fedja Jan Wendisch, Yuri Kivshar, Andreas Tittl, Stefan A. Maier
Summary: Breaking the in-plane geometric symmetry of dielectric metasurfaces allows access to a set of electromagnetic states called symmetry-protected quasi-bound states in the continuum (qBICs). We demonstrate that qBICs can also be accessed by breaking the symmetry in the permittivity of the materials. Weak permittivity modulations due to carrier doping, and electro-optical Pockels and Kerr effects, can enable infinitesimal permittivity asymmetries for on-demand, dynamically tunable resonances of extremely high quality factors.
Article
Chemistry, Physical
Thomas Weber, Lucca Kuehner, Luca Sortino, Amine Ben Mhenni, Nathan P. Wilson, Julius Kuehne, Jonathan J. Finley, Stefan A. Maier, Andreas Tittl
Summary: In this study, strong coupling in bound state in the continuum metasurfaces on nanostructured bulk WS2 is demonstrated, with sharp resonances, tailored linewidths, and controllable light-matter coupling strength.
Article
Physics, Multidisciplinary
Romain Tirole, Stefano Vezzoli, Emanuele Galiffi, Iain Robertson, Dries Maurice, Benjamin Tilmann, Stefan A. Maier, John B. Pendry, Riccardo Sapienza
Summary: A temporal version of Young's double-slit experiment shows interference in the frequency domain when light interacts with time slits produced by ultrafast changes in the refractive index.
Article
Chemistry, Multidisciplinary
Dmytro Gryb, Fedja J. Wendisch, Andreas Aigner, Thorsten Goelz, Andreas Tittl, Leonardo de S. Menezes, Stefan A. Maier
Summary: This study presents one of the geometrically simplest two-dimensional chiral metasurface platforms by arranging achiral dielectric rods in a square lattice and creating chirality through rotating individual meta-atoms. The chiroptical responses obtained from this design are stronger or comparable to more complex designs. Additionally, it is found that the resonances dependent on the arrangement are robust against geometric variations and exhibit similar behavior in experiments and simulations.
Article
Nanoscience & Nanotechnology
David A. Katzmarek, Andrea Mancini, Stefan A. Maier, Francesca Iacopi
Summary: This article presents a simple method for the direct synthesis of transfer-free, nanopatterned epitaxial graphene on silicon carbide on silicon substrates. By using common lithography and lift-off techniques, a catalytic alloy tailored for optimal SiC graphitization is patterned to form planar graphene structures on top of an unpatterned SiC layer. The method is compatible with both electron-beam lithography and UV-lithography, enabling the realization of graphene gratings with a minimum width/space of at least 100 nm at the wafer scale. The resolution is limited by the flow of the metal catalyst during the liquid-phase graphitization process, but it can be further improved through optimization of the metal deposition method and lift-off process.
Article
Multidisciplinary Sciences
Sultan Ben-Jaber, Daniel Glass, Thomas Brick, Stefan A. Maier, Ivan P. Parkin, Emiliano Cortes, William J. Peveler, Raul Quesada-Cabrera
Summary: Photo-induced enhanced Raman spectroscopy (PIERS) is a highly sensitive surface-enhanced Raman spectroscopy (SERS) technique for detecting ultra-low concentrations of organic molecules. This study compares PIERS with Vo-induced SERS approaches to further confirm the role of Vo in PIERS and presents a proposed mechanism and discussion on using PIERS as a probe to explore photocatalytic materials.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Luca M. Berger, Martin Barkey, Stefan A. Maier, Andreas Tittl
Summary: This article investigates an emerging class of metasurfaces that can control the coupling between bound states in the continuum (BICs) and the far field. It is demonstrated experimentally that these metasurfaces sustain angular-robust quasi-BICs in the mid-infrared spectral region. Compared to conventional alternatives, these metasurfaces exhibit superior performance, making them promising for applications in bio-sensing, optical devices, and photonic devices using focused light.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Simone Ezendam, Lin Nan, Ianina L. Violi, Stefan A. Maier, Emiliano Cortes, Guillaume Baffou, Julian Gargiulo
Summary: Metallic nanoparticles have strong photothermal responses, but measuring their temperature accurately is challenging. Anti Stokes thermometry is a label-free technique mainly used for single particles. This study introduces the theoretical framework to apply it to the collective heating of ensembles and demonstrates temperature measurements of arrays of Au nanodisks, which are validated with wavefront microscopy, showing excellent agreement.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
C. A. Downing, E. del Valle, A. I. Fernandez-Dominguez
Summary: In this article, we study a driven-dissipative duo of two-level systems using an open quantum systems approach, which models a pair of atoms or more generally, meta-atoms. By allowing complex-valued couplings, both coherent and incoherent, in the setup, we explore a diverse coupling landscape. We examine different scenarios on this landscape, where the coupling between the two-level systems can be predominantly coherent, incoherent, unsymmetrical, or even unidirectional. These variations in coupling lead to remarkable features in the populations, correlations, and optical spectra of the pair, potentially surpassing the Mollow triplet spectrum for a single atom and allowing for population trapping.
