A5056768459- Plasmonic and Surface Plasmon Research
- Gold and Silver Nanoparticles Synthesis and Applications
- Orbital Angular Momentum in Optics
- Photonic and Optical Devices
- 2D Materials and Applications
- Mechanical and Optical Resonators
- Perovskite Materials and Applications
- Strong Light-Matter Interactions
- Metamaterials and Metasurfaces Applications
- Advanced Fiber Laser Technologies
- Electrochemical Analysis and Applications
- Molecular Junctions and Nanostructures
- MXene and MAX Phase Materials
- Terahertz technology and applications
- Graphene research and applications
- Biosimilars and Bioanalytical Methods
- Quantum Dots Synthesis And Properties
- Luminescence and Fluorescent Materials
- Advanced biosensing and bioanalysis techniques
- Optical and Acousto-Optic Technologies
- Local Government Finance and Decentralization
- Cell Image Analysis Techniques
- Piezoelectric Actuators and Control
- Topological Materials and Phenomena
- Protein Interaction Studies and Fluorescence Analysis
Center for Drug Evaluation and Research
2024
University of Central Florida
2023-2024
Missouri University of Science and Technology
2019-2022
United States Food and Drug Administration
2021
Siemens (United States)
2018-2020
Siemens (Germany)
2019
Laboratoire Interdisciplinaire Carnot de Bourgogne
2018
Université de Bourgogne
2018
Université Bourgogne Franche-Comté
2018
Centre National de la Recherche Scientifique
2018
Nonlinear holography enables optical beam generation and holographic image reconstruction at new frequencies other than the excitation fundamental frequency, providing pathways toward unprecedented applications in information processing data security. So far, plasmonic metasurfaces with thickness of tens nanometers have been mostly adopted for realizing nonlinear holograms potential on-chip integration but suffering from low conversion efficiency high absorption loss. Here, we report a...
Initiated as a cable-replacement solution, short-range wireless power transfer has rapidly become ubiquitous in the development of modern high-data throughput networking centimeter to meter accessibility range. Wireless technology is now penetrating higher level system integration for chip-to-chip and on-chip radiofrequency interconnects. However, standard CMOS integrated millimeter-wave antennas have typical size commensurable with operating wavelength, are thus an unrealistic solution...
Abstract Germanium selenide (GeSe) is a 2D layered material with an anisotropic crystal structure analogous to black phosphorus (BP). But unlike BP, GeSe stable under ambient conditions and therefore provides more flexibility in building practical nanoscale devices. The in‐plane vibrational, electrical, optical properties of originating from the low symmetry its are being explored mostly for polarization‐sensitive optoelectronic However, nonlinear have not been investigated yet. Here,...
The capability of controlling the phase nonlinear polarization media is vital for optical beam shaping. Achieving this control over manipulation on nanoscale facilitates modern on-chip photonic integration Plasmonic metasurfaces with thickness down to tens nanometers can be used provide continuous local phases via spin-rotation coupling light, but they still suffer from low conversion efficiency and high absorption loss. Concomitantly, dielectric cannot brought a scale lower than hundreds...
The 14th edition of the Workshop on Recent Issues in Bioanalysis (14th WRIB) was held virtually June 15-29, 2020 with an attendance over 1000 representatives from pharmaceutical/biopharmaceutical companies, biotechnology contract research organizations, and regulatory agencies worldwide. WRIB included three Main Workshops, seven Specialized Workshops that together spanned 11 days order to allow exhaustive thorough coverage all major issues bioanalysis, biomarkers, immunogenicity, gene...
Microstructures of a material form the bridge linking processing conditions - which can be controlled, to property is primary interest in engineering applications. Thus critical task design establishing processing-structure relationship, requires domain expertise and techniques that model high-dimensional microstructure. This work proposes deep learning based approach models relationship as conditional image synthesis problem. In particular, we develop an auxiliary classifier Wasserstein GAN...
Abstract The mechanical exfoliation of naturally occurring layered materials has emerged as an easy and effective method for achieving ultrathin van der Waals (vdW) heterostructures with well-defined lattice orientations the constituent two-dimensional (2D) material layers. Cylindrite is one such vdW heterostructure, where superlattice composed alternating stacks SnS 2 -like PbS-like Although 2D lattices are isotropic, inhomogeneous strain from local atomic alignment forcing commensuration...
We experimentally show how a single Ag nanoparticle (NP) coupled to an nanowire (NW) can convert propagating surface plasmon polaritons directional photons. By employing dual-excitation Fourier microscopy with spatially filtered collection-optics, we single- and dual-directional out-coupling of light from NW-NP junction for plasmons excited through glass-substrate air-superstrate. Furthermore, influence the directionality molecular-fluorescence emission, thus functioning as optical antenna....
Plasmonic nanodimers facilitate electromagnetic hotspots at their gap junction. By loading these junctions with nanomaterials, the plasmonic properties of nanodimer can be varied. In this study, we bridged junction gold (Au) nanocylinder dimer palladium (Pd), and numerically evaluated designed nanostructure. We simulated far-field extinction spectra Pd Au dimer, identified dipole quadrupole plasmon modes 839 578 nm, respectively. varying geometrical parameters bridge, revealed ability to...
Quantum size effects in armchair graphene nanoribbons (AGNRs) with hydrogen termination are investigated via density functional theory (DFT) the Kohn-Sham formulation. ``Selection rules'' formulated, which allow extraction (approximately) electronic structure of AGNR bands starting from four dispersion sheets. In analogy case carbon nanotubes, a threefold periodicity excitation gap ribbon width ($N$; number atoms per slice) is predicted, confirmed by ab initio results. While traditionally...
The localized interaction between metallic nanostructures and surrounding fluorescent molecules can influence the emission characteristics of molecule. With this hindsight, herein, by employing a Fourier optical fluorescence microscope, we experimentally show how from in vicinity chemically prepared silver nanowire-dimer-junction be directed one or two channels. Measured forward-to-backward ratio single channel was as high 4.3 dB, observed polar azimuthal angular spread narrow 15° 60°,...
In this letter, we show how organic molecular waveguides of 1,5-diaminoanthraquinone molecules can be grown on a silica microsphere to obtain microsphere-coupled (MOWs). Using such MOWs, remotely excite and detect whispering gallery modes (WGMs) the attached microsphere. Interestingly, these WGMs showed mode-splitting mode-mixing due broken azimuthal symmetry Furthermore, waveguiding characteristics MOWs quadrupole intensity pattern as function input polarization. The presented geometry an...
Abstract Wavelength, polarization and orbital angular momentum of light are important degrees freedom for processing encoding information in optical communication. Over the years, generation conversion nonlinear media has found many novel applications context communication quantum processing. With that hindsight, here vortices through second-harmonic from only one atomically thin WS 2 monolayer is demonstrated at room temperature. Moreover, it shown valley-contrasting physics associated with...
Room-temperature longwave infrared (LWIR) detectors are preferred over cryogenically cooled solutions due to the cost effectiveness and ease of operation. The performance present uncooled LWIR such as microbolometers, is limited by reduced sensitivity, slow response time, lack dynamic spectral tunability. Here, we a graphene-based efficient room-temperature detector with high detectivity fast time utilizing its tunable optical electronic characteristics. inherent weak light absorption...
Surface-enhanced Raman scattering (SERS) has emerged as a powerful tool to probe molecules at nanoscale. By utilizing plasmon polaritons on metallic nanowires, remote-excitation SERS can be achieved. Enhancement and modulation of remote-SERS intensity are vital for nano-optical spectroscopy. Counter-propagating plasmons have been excited in plasmonic nanowire-nanoparticle (NW-NP) system further utilized perform SERS. using the polarization counter-propagating fields, from NW-NP hot-spot...
We demonstrate how a silver-nanowire-dimer can be employed to optically excite dual-path surface-plasmon-polaritons and utilize them perform remote-excitation surface-enhanced Raman scattering (SERS) microscopy. Interestingly, this unique geometry allows us SERS. Our experiments show that for the same value of excitation-laser powers, excitation leads enhanced-SERS signal compared single-path excitation, which has been corroborated by 3-D finite-difference time-domain simulations....
Abstract Lengenbachite is a naturally occurring layered mineral formed with alternating stacks of two constituent PbS-like and M 2 S 3 -like two-dimensional (2D) material layers due to the phase segregation process during formation. Here, we demonstrate achieve van der Waals (vdW) heterostructures lengenbachite down few layer-pair thickness by mechanical exfoliation bulk mineral. The incommensurability between isotropic 2D makes vdW heterostructure exhibit strong in-plane structural...
Abstract Nagyágite is a naturally occurring layered van der Waals heterostructure composed of alternating layers [Pb(Pb,Sb)S 2 ] and [(Au,Te)], where the component lattices are commensurately modulated. The weak stacking between heterolayers facilitates mechanical exfoliation. Due to its monoclinic crystal structure, nagyágite exhibits structural anisotropy which induces strong optical anisotropy. Here, anisotropic properties ultrathin flakes mechanically exfoliated from natural mineral...
In this paper the design of intergovernmental transfer schemes in a federation is analysed, focusing on that can have significant impact improving interpersonal distribution sense alleviating poverty. It argued states with lower income larger concentrations poor persons and their ability to combat poverty opportunity cost higher. Federal transfers are not only cost-effective means enabling such undertake nationally optimal levels alleviation but also way ensuring they actually do so. The...
Abstract Electrically biased metal nanostructures are at the core of innovative multifunctional integrated devices that control flow electrons and photons nanoscale. They based on plasmonic structures create strongly confined fields, typically associated with large temperature gradients. These thermal effects may generate artifact responses detrimental to desired operation. We show here how a biasing polarity local optical excitation asymmetry generic geometry – nanoscale constriction...