We propose and report on the design of a 1-D metallo-dielectric nano-grating GaAs substrate. numerically study impact grating period, slit wire widths, irradiating angle incidence optical response. The optimal width, w = 160 nm, was chosen based previous results from investigations into influence width nano-slit dimensions electrical enhancements in metal-semiconductor-metal photodetectors. In this present project, resonant absorption reflection modes were observed while varying widths to...

The adhesion layer used in nanofabrication process of metallic nanostructures affects the surface plasmon modes. We characterize localized resonances (SPRs) gold nanodisks various diameters and heights while varying thickness Ti layers. Scattering, absorption, extinction coefficient calculations show a significant dependence SPR on size thickness. Comparisons peak resonance wavelengths different thicknesses indicate red shift reduction amplitude as increases. A comparison spectral broadening...

We report on the tunable edge-plasmon-enhanced absorption of phosphorene nanoribbons supported a dielectric substrate. Monolayer anisotropic black phosphorous (phosphorene) are explored for light trapping and enhancement different substrates. show that these ribbons support infrared surface plasmons with high spatial confinement. The peak position bandwidth calculated spectra low loss over wide wavelength range via surrounding environment periodic nanoribbons. Simulation results strong edge...

Metallic, especially gold, nanostructures exhibit plasmonic behavior in the visible to near-infrared light range. In this study, we investigate optical enhancement and absorption of gold nanobars with different thicknesses for transverse longitudinal polarizations using finite element method simulations. This study also reports on discrepancy resonance wavelengths sharp-corner round-corner constant length 100 nm width 60 nm. The result shows that amplitude wavelength have strong dependences...

Fabrication of sub-10 nm features is advantageous for continued improvement plasmonic enhancement applications. This letter demonstrates a technique, called nanomasking, which can fabricate nanostructures and gaps below the resolution limit lithography technique used in process: nanogaps that are less than 10 width, with 15 widths. method improves upon existing techniques creating metallic at this scale, it also scalable mass production. Unique structures be fabricated have been optically...

Interaction between metallic nanoparticles has been widely investigated due to the rise of enhanced local electric field inside gap. We numerically present broadband near- and far-field spectra from near-ultraviolet (UV) through visible wavelength range using plasmonic heterodimers. Both resonances can be manipulated by composition They show strong dependencies on gap width particle size. Compared with Al-Au Al-Ag heterodimers, dipole-mode resonant peak a redshift for Au-Ag heterodimer. In...

Abstract This work presents a new substrate platform, which provides tunability of the group velocity and spontaneous emission dipolar scatterer graphene–ferroelectric slab hybrid system in terahertz ranges. We use analytical models to determine hybridization graphene surface plasmon ferroelectric LiNbO 3 type I II reststrahlen hyperbolic phonon–polariton. The variation chemical potential thickness layer results several distinct features. Flipping velocity, strongly coupled...

This work thoroughly investigates gold nanowires with various cross-sectional geometries and patterns. The study has determined the effect of cross section aspect ratio on its maximum optical enhancement. plasmonic enhancement properties single an array three were investigated using finite element method simulations. results indicate a significant dependence both thickness width nanowires. From simulation data, equation for each geometry (single triple array) was found that relates...

This work studies the effect of a plasmonic array structure coupled with thin film oxide substrate layers on optical surface enhancement using finite element method. Previous results have shown that as nanowire spacing increases in sub-100 nm range, decreases; however, this improves upon previous by extending range above 100 nm. It also averages across entire device rather than localized regions, which gives more practical estimate sensor response. A significant finding is higher ranges,...

Plasmonic structures can be used to enhance electromagnetic radiation, and nanoscale (<5 nm) gaps increase this enhancement even further. Fabrication of these desired involves using a relatively new, previously developed self-aligned process overcome typical electron beam lithography resolution limits. The resulting nanogap have been shown exhibit enhanced optical emission. This technique enables the fabrication large-area two-dimensional matrix such nanostructures which could prove useful...

Plasmon coupling and hybridization in 2D materials plays a significant role for controlling light–matter interaction at the nanoscale.

Making use of a newly established nanomasking technique, nanoscale features (sub-10 nm) have been fabricated with the potential to act as plasmonic enhancement structures. The technique makes two-step lithography process simultaneously produce many hotspots two-dimensional over large area, showing promise for mass production scalability. This is highly reproducible, reliably patterning multiple nanostructures and nanogaps potentially wafer-scale area without significantly increasing number...

The authors present the use of epitaxial AlN as dielectric in a chip level thin film capacitor for operation at high temperatures and frequencies. They have performed capacitance measurements up to 600 K. basic performance is modeled simple metal-insulator-semiconductor capacitor, which provides insight into underlying mechanisms accumulation, depletion, inversion. Throughout tested temperature range, highly stable with only slight, linear, decrease temperature. Additionally, low...

This work advances the fabrication capabilities of a two-step lithography technique known as nanomasking for patterning metallic nanoslit (nanogap) structures with sub-10-nm resolution, below limit tools used during process. Control over structure and slit geometry is key component reported method, exhibiting control lithographic methods while adding potential mass-production scale speed secondary step The unique process allows interesting geometric combinations such dual-width gratings that...

Interaction between metallic nanoparticles has been widely investigated due to the rise of enhanced local electric field inside gap. We numerically present broadband near- and far-field spectra from near-ultraviolet (UV) through visible wavelength range using plasmonic heterodimers. Both resonances can be manipulated by composition They show strong dependencies on gap width particle size. Compared with Al-Au Al-Ag heterodimers, dipole-mode resonant peak a redshift for Au-Ag heterodimer. In...

Surface-enhanced Raman spectroscopy (SERS) improves the scope and power of by taking advantage plasmonic nanostructures, which have potential to enhance signal strength several orders magnitude, can allow for detection analyte molecules. The dataset presented provides results a computational study that used finite element method (FEM) model gold nanowires on silicon dioxide substrate. survey calculated surface average optical enhancement due effects across entire studied various geometric...

Localized surface plasmons have been reported for periodic 2D monolayer black phosphorene (BP) nanoribbons in the infrared region. The anisotropic nature of BP causes different plasmonic effects depending on their orientation over select dielectric substrates, leading to tunability and promising future applications imaging other detectors. Computational models are used demonstrate that by tuning localized resonance, as well nanoribbon, it is possible obtain desired coupled resonance modes...

We investigate an interdigitated nanograting structure on a GaAs substrate for plasmonic metal–semiconductor–metal photodetector applications. This computational work has studied the effects that taper angle of sidewall and light wave incidence have optical current enhancements in device. The study, involving two types structures—positive negative—showed both directions can generate more electrical than perfectly vertical wall structures incident at Brewster normal angle. enhanced electric...