Article
Physics, Fluids & Plasmas
Youssef Jeyar, Mauro Antezza, Brahim Guizal
Summary: We propose a numerical method to solve the electromagnetic scattering problem of a dielectric cylinder partially covered with graphene. By using a classical Fourier-Bessel expansion of the electric field inside and outside the cylinder, and incorporating appropriate boundary conditions in the presence of graphene, we introduce auxiliary boundary conditions to account for the singular nature of the electric field at the edges of the graphene sheet. The method is simple and efficient, and allows for the study of diffraction from such structures. We also identify multiple plasmonic resonances due to the presence of surface modes on the coated cylinder.
Article
Optics
Shangyu Zhang, Jian Dong, Wenjie Zhang, Minggang Luo, Linhua Liu
Summary: In this study, the specific influence mechanisms of host dissipation on the extinction efficiency factors of a plasmonic nanosphere are elaborated using a generalized Mie theory. The experimental results demonstrate that host dissipation has a significant impact on the position and properties of localized surface plasmon resonance.
Article
Chemistry, Analytical
Victor Coello, Mas-ud A. Abdulkareem, Cesar E. Garcia-Ortiz, Citlalli T. Sosa-Sanchez, Ricardo Tellez-Limon, Marycarmen Pena-Gomar
Summary: In this study, the optical properties of a 2D-gap surface plasmon metasurface composed of gold nanoblocks were investigated. The metasurface demonstrated the capability to generate simultaneous multi-plasmonic resonances and offered tunability within the near-infrared domain. Reflectance spectra were analyzed for various lattice periods, revealing two distinct dips with near-zero reflectance indicating resonant modes. The broader dip at 1150 nm exhibited consistent behavior across all lattice periodicities, attributed to a Fano-type hybridization mechanism.
Article
Chemistry, Physical
Baodong Gai, Jingwei Guo
Summary: A plasmonic array pair structure composed of two stacked finite square array panels is proposed in this work, and by twisting the structure, its plasmonic SLR changes significantly. The simulation results show that optical properties, such as resonance peaks, change inversely when the structure is twisted.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Sunny Tiwari, Adarsh B. Vasista, Diptabrata Paul, Shailendra K. Chaubey, G. V. Pavan Kumar
Summary: Experimental observation of beaming elastic and surface enhanced Raman scattering (SERS) emission from a bent-nanowire on a mirror (B-NWoM) cavity. The system utilized a self-assembled monolayer of molecules with a well-defined molecular orientation to achieve beaming SERS emission.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Optics
Sumitra Dey, Deb Chatterjee, Edward J. Garboczi, Ahmed M. Hassan
Summary: This study uses full-wave simulations to investigate the plasmonic resonances of CNT dimers embedded in a lossy dielectric slab with finite thickness. The results demonstrate that the finite thickness dielectric slab leads to the emergence of new CNT resonance behavior, and that the resonance behavior changes significantly when two CNTs form a dimer near the slab interface.
Article
Chemistry, Physical
Marc R. Bourgeois, Andrew W. Rossi, Matthieu Chalifour, Charles Cherqui, David J. Masiello
Summary: This study investigates the manifestations of the lattice Kerker effect in 1D arrays of planar plasmonic oligomer trimers, using numerical calculations and a coupled electric dipole model. In addition to providing an intuitive explanation for characteristic signatures of the lattice Kerker effect at normal incidence, the model also enables the evaluation of angular scattered power distributions for non-normal angles of incidence.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
V. S. Gerasimov, A. E. Ershov, R. G. Bikbaev, I. L. Rasskazov, I. L. Isaev, P. N. Semina, A. S. Kostyukov, V. Zakomirnyi, S. P. Polyutov, S. Karpov
Summary: The Kerker effect has been largely abandoned but experienced a revival with the emergence of all-dielectric nanophotonics, and can now be observed in nanostructures made of high-index materials. By adjusting the geometrical parameters of Al arrays, the lattice Kerker effect can be tailored in the UV and visible wavelength ranges, presenting a challenge for achieving this with other materials. The results of this study have far-reaching implications for plasmonics and the further application of the Kerker effect.
Article
Optics
Julius Gohsrich, Tirth Shah, Andrea Aiello
Summary: Dielectric spheres can sustain electromagnetic whispering-gallery modes resonating at optical frequencies with narrow linewidths, but deviations from spherical shape can shift and broaden these resonances. A boundary-condition perturbation theory is used to determine the shifted and broadened resonances of nearly spherical dielectric cavities, providing power series expansions for the frequencies and linewidths. This approach avoids dealing with decaying quasinormal modes and discusses the physical conditions for the applicability of perturbation theory.
Article
Quantum Science & Technology
Marco Merkli
Summary: A framework for analyzing the dynamics of a finite-dimensional quantum system in contact with a reservoir has been developed, showing the Markovian nature of the reduced system evolution. The approach includes a detailed analysis of the link between dynamics and spectral properties of the generator of the dynamics, allowing for interactions with little regularity. The work distills the structural and technical ingredients causing the characteristic features of the system dynamics.
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
Physics, Multidisciplinary
P. Sai, V. V. Korotyeyev, M. Dub, M. Slowikowski, M. Filipiak, D. B. But, Yu. Ivonyak, M. Sakowicz, Yu. M. Lyaschuk, S. M. Kukhtaruk, G. Cywinski, W. Knap
Summary: In this study, we investigated resonant two-dimensional plasmon excitations in grating-gated quantum well heterostructures, which allows for electrical control of charge carrier density. Our results show that all terahertz plasmonic resonances in these structures can be explained within the plasmonic crystal model, and we identified two different plasmonic crystal phases. By gate controlling the modulation degree, we observed a continuous transition between these phases. We also discovered that the resonant plasma frequencies of ungated regions still depend on the gate voltage. These findings have implications for understanding THz plasma physics and developing all-electrically tunable devices for THz optoelectronics.
Article
Optics
Ni Zhang, Xinrui Lei, Jiachen Liu, Qiwen Zhan
Summary: This research proposes a continuous manipulation method for the topology of graphene plasmon skyrmions, which can be achieved by adjusting the electrotunable properties of graphene. The transformation of skyrmion number from 1 to 0.5 is evident, demonstrating the direct manipulation of graphene plasmon skyrmions. This work suggests a feasible way to flexibly control the topology of an optical skyrmionic field, which can be used for novel integrated photonic devices in the future.
Article
Materials Science, Multidisciplinary
Gino Wegner, Dan-Nha Huynh, N. Asger Mortensen, Francesco Intravaia, Kurt Busch
Summary: The paper discusses the impact of an extended model proposed by Halevi on the nonlocal response of plasmonic materials and nanostructures. It reevaluates the Mie scattering coefficients for a cylinder and corresponding plasmon-polariton resonances within this framework. The analysis reveals a nonlocal, collisional, and size-dependent damping term that affects the resonances in the extinction spectrum. The implementation of the Halevi model in the time domain is particularly important for efficient and accurate modeling of nanogap structures and other nanoscale features in nanoplasmonics applications.
Article
Multidisciplinary Sciences
Jung-Hwan Song, Soren Raza, Jorik van de Groep, Ju-Hyung Kang, Qitong Li, Pieter G. Kik, Mark L. Brongersma
Summary: Researchers constructed a nanoelectromechanical system that utilizes unique behavior between sub-nanometer plasmonic nanoparticles to create an electro-optical modulator, with a very large mechanical tunability observed at nanometer gap spacing.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
Karim Achouri, Andrei Kiselev, Olivier J. F. Martin
Summary: We present a frequency-domain modeling technique for second-order nonlinear metasurfaces, derived from the generalized sheet transition conditions (GSTCs). By extending the GSTCs to include effective nonlinear polarizations, the effective nonlinear susceptibilities of a given metasurface can be retrieved and its nonlinear scattering responses can be predicted under arbitrary illumination conditions. The proposed model can serve as a design platform for implementing complex nonlinear metasurface based applications.
NEW JOURNAL OF PHYSICS
(2022)
Article
Chemistry, Physical
Henry S. C. Yu, Ana Conde-Rubio, Hsiang-Chu Wang, Olivier J. F. Martin, Giovanni Boero, Jurgen Brugger
Summary: This study demonstrates the fabrication and characterization of reusable templates with nanoscale traps for precise nanoparticle placement in the capillary-assisted particle assembly (CAPA) technique. The results show that the nanotemplates made by electron-beam lithography can be reused for repeatable CAPA processes, making the technique more cost-efficient.
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
(2022)
Review
Electrochemistry
Madasamy Thangamuthu, V Raziman, Olivier J. F. Martin, Junwang Tang
Summary: This article reviews the applications and promotion mechanisms of plasmonic effects in photocatalysis, including near-field coupling, light scattering, guided mode, resonant energy transfer, and thermoplasmonics. The article also discusses the understanding and distinction of plasmonic effects from chemical effects, as well as the analysis of photoconversion efficiency.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
Marco Riccardi, Christian Santschi, Olivier J. F. Martin
Summary: This study investigates the fabrication process of high aspect ratio gold electrodes and highlights the stability issues that arise when using inorganic adhesion layers. It demonstrates that the use of organic silane self-assembled monolayers improves the long term stability of these structures.
MICROELECTRONIC ENGINEERING
(2022)
Article
Chemistry, Analytical
Siarhei Zavatski, Hanna Bandarenka, Olivier J. F. Martin
Summary: Dielectrophoresis (DEP) is a versatile tool for precise manipulation of substances at the microscale. However, the manipulation of complex molecular-sized particulates such as proteins requires the development of appropriate theoretical models and their experimental verification. In this study, an original DEP platform was constructed to test the Holzel-Pethig empirical model for protein DEP. The results highlighted the need for more sophisticated theoretical models to understand the response of molecular entities in DEP fields.
ANALYTICAL CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Marco Riccardi, Olivier J. F. Martin
Summary: Electromagnetic forces and torques play a crucial role in technologies like optical tweezers and dielectrophoresis, as they rely on the interaction between an oscillating electric field and matter particles. This study offers a unified framework for understanding this interaction at both low-frequency (dielectrophoresis) and high-frequency (optical tweezers) oscillations. It draws parallels between the two techniques, explores their underlying assumptions, and showcases important applications in physical and analytical chemistry, biosensing, and colloidal science.
Article
Materials Science, Multidisciplinary
Hsiang-Chu Wang, Olivier J. F. Martin
Summary: The response of simple plasmonic nanorods to polarized illumination is explored. By controlling the polarization of light, a wide range of colors can be generated, including black, despite the material having low light absorption. The ability to manipulate the nanorod length and orientation allows for a rich palette of optical effects.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jeonghyeon Kim, Olivier J. F. Martin
Summary: Single-particle tracking and optical tweezers are powerful techniques for studying microscopic processes, providing insights into the interactions between microscopic particles and surrounding molecules. This article demonstrates their application in studying molecular interactions at solid-liquid interfaces, specifically investigating surfactant behaviors at the water-glass interface by tracking optically trapped gold nanoparticles.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Optics
Remi Colom, Elena Mikheeva, Karim Achouri, Jesus Zuniga-Perez, Nicolas Bonod, Olivier J. F. Martin, Sven Burger, Patrice Genevet
Summary: Full wavefront control requires spatial phase modulation ranging from 0 to 2pi. The radiative coupling of optical components makes them non-Hermitian systems, described by complex eigenfrequencies. Breaking parity or time symmetry moves the singularities of reflection or transmission matrices. This understanding is applied to engineer electromagnetic fields, with non-Hermitian topological features playing a pivotal role.
LASER & PHOTONICS REVIEWS
(2023)
Article
Biochemistry & Molecular Biology
Jeonghyeon Kim, Olivier J. F. Martin
Summary: Understanding surfactant behavior at interfaces is crucial for many applications. This study uses optical tweezers and trajectory analysis to investigate the behavior of cetyltrimethylammonium bromide (CTAB) and cetyltrimethylammonium chloride (CTAC) at water-glass interfaces. The results show that counterions have a significant effect on surfactant behavior, with bromide ions enhancing the mobility of micelles at the interface. This research provides valuable insights into surfactant behavior and highlights the potential of optical tweezers for surfactant research.
Article
Chemistry, Multidisciplinary
Sergejs Boroviks, Andrei Kiselev, Karim Achouri, Olivier J. F. Martin
Summary: We have demonstrated a nonlinear plasmonic metasurface that has a strongly asymmetric second-harmonic generation. The nonlinear scattering is efficient when excited in one direction, but it is suppressed when the excitation direction is reversed, creating a diode-like functionality. Experimental measurements show a significant extinction ratio of approximately 10 dB for second-harmonic generation with opposite excitations, and these findings are supported by full-wave simulations. The asymmetry in the material composition, achieved by using a combination of aluminum and silver, leads to a bianisotropic response of the system.
Article
Optics
Ville Tiukuvaara, Olivier J. F. Martin, Karim Achouri
Summary: We derive generalized sheet transition conditions (GSTCs) including dipoles and quadrupoles, using generalized functions (distributions). This derivation verifies that the GSTCs are valid for metasurfaces in non-homogeneous environments, such as for practical metasurfaces fabricated on a substrate. The inclusion of quadrupoles and modeling of spatial dispersion provides additional hyper-susceptibility components which serve as degrees of freedom for wave transformations. We leverage them to demonstrate a generalized Brewster effect with multiple angles of incidence at which reflection is suppressed, along with an anti-Brewster effect where transmission is suppressed.
Article
Nanoscience & Nanotechnology
Yalan Ma, Olivier J. F. Martin, Andreas Stemmer
Summary: We investigated the plasmon modes of gold nanorods on a nonmetallic conductive substrate using scanning tunneling microscope-induced light emission. The radiative decay of plasmon modes on the nanorods excited by inelastic electron tunneling was identified as the far-field light. The presence of the tungsten tip with a high-dielectric constant influenced the line shapes of the plasmon spectra and enhanced the strength of the plasmon peaks.
Article
Nanoscience & Nanotechnology
Dorian Herle, Andrei Kiselev, Luis Guillermo Villanueva, Olivier J. F. Martin, Niels Quack
Summary: In this work, a mechanically tunable metasurface reflectivity modulator based on Mie resonance enhanced absorption is demonstrated. The metasurface consists of an amorphous silicon nanopillar array and a suspended amorphous silicon membrane with integrated electrostatic actuators. By achieving a membrane displacement of only 150 nm, a reflectivity contrast ratio of 1:3 is achieved over the spectral range from 400-530 nm. With fast, low-power electrostatic actuation and a broadband response in the visible spectrum, this mechanically tunable metasurface reflectivity modulator could enable high framerate dynamic reflective displays.
Article
Nanoscience & Nanotechnology
Karim Achouri, Mintae Chung, Andrei Kiselev, Olivier J. F. Martin
Summary: It has been observed that achiral nanoparticles may experience an optical torque when illuminated by linearly polarized light. However, the origin of this phenomenon has remained mostly unexplained. By using multipolar theory and considering nonlocal interactions, researchers have found that this torque arises from multipolar pseudochiral responses generated by the particles, which are dependent on the particles' asymmetry.
