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Modal analysis for nanoplasmonics with nonlocal material properties
摘要： Plasmonic devices with feature sizes of a few nanometers exhibit effects which can be described by the nonlocal hydrodynamic Drude model. We demonstrate how to exploit contour integral methods for computing eigenfrequencies and resonant states of such systems. We propose an approach for deriving the modal expansion of relevant physical observables. We use the methods to perform a modal analysis for a metal nanowire. All complex eigenfrequencies in a large frequency range and the corresponding resonant states are computed. We identify those resonant states which are relevant for the extinction cross section of the nanowire.
关键词： extinction cross section,nanoplasmonics,hydrodynamic Drude model,modal analysis,nonlocal material properties,metal nanowire
更新于2025-09-16 10:30:52
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Non-contact Laser Printing of Ag Nanowire-based Electrode with Photodegradable Polymers
摘要： The roll-to-roll process is synonymous with newspaper production. If a similar high-throughput process is developed to fabricate electronics over large areas, it would revolutionize the printed electronics manufacturing process. Rapid fabrication of electrode, including patterning and nanoscale welding, is a necessary integration technique to reduce the duration of the process, but faces difficulties in being realized using conventional methods. This paper discusses material factors that affect printability, in the context of developing a promising fabrication technique called laser induced forward transfer (LIFT); LIFT is non-contact printing technique applied previously to realize simultaneous pattern deposition and nanowelding of Ag nanowire (AgNW)-based electrodes. A photodegradable polymer, which is a key component in the printing process to render droplet acceleration, is investigated with regards to its mechanical and optical properties. Furthermore, the printing process of the AgNW-based electrode is visualized, resulting in deeper understanding of LIFT. Knowledge of these factors will contribute to rapid and precise patterning of AgNW-based electrodes with high stretchability and transparency toward flexible optoelectronics devices.
关键词： Printable electronics,Metal nanowire,Transparent electrode
更新于2025-09-12 10:27:22
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[IEEE 2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO) - Kiev (2018.4.24-2018.4.26)] 2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO) - Plasmon Resonance Wavelengths of Circular Metal Nanowires with Account of Losses
摘要： We investigate the resonances in the scattering and absorption of the TE-polarized light by the solid silver, gold and copper wires of nanoscale diameter and circular cross-section. Here we use the analytical solution and experimental data for the metal complex permittivity function in the visible range. We find that the well-known textbook equation for the wavelength of the localized surface plasmon (LSP) resonances is valid for a silver cylinder but not for gold and copper ones. The reason is different values of losses in these metals: gold and copper have much larger values of imaginary part of the relative permittivity in the visible range than silver. This shifts the LSP resonances to considerably longer wavelengths. We present a simple modified equation for finding these wavelengths.
关键词： scattering,absorption,plasmon resonance,lossy metal nanowire
更新于2025-09-10 09:29:36