A5015362861- Gold and Silver Nanoparticles Synthesis and Applications
- Chalcogenide Semiconductor Thin Films
- Plasmonic and Surface Plasmon Research
- Quantum Dots Synthesis And Properties
- Advanced biosensing and bioanalysis techniques
- Optical Coatings and Gratings
- Photonic Crystals and Applications
University of Indianapolis
2019-2022
Raman sensing is a powerful technique for detecting chemical signatures, especially when combined with optical enhancement techniques such as using substrates containing plasmonic nanostructures. In this work, we successfully demonstrated surface-enhanced spectroscopy (SERS) of two analytes adsorbed onto gold nanosphere metasurfaces tunable subnanometer gap widths. These metasurfaces, which push the bounds previously studied SERS nanostructure feature sizes, were fabricated precise control...
Quantum dots are becoming more recognized as a tool to use in varying photonic and sensing technologies. When quantum illuminated, they can emit light; by altering the dot characteristics, wavelength of emitted light be finely tuned. The may gradually increase intensity when continuously behavior called photobrightening. We focus on this brightening explore different factors that contribute Increased excitation results increased rate photobrightening, shown work exciting samples with laser...
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...
This study explores optical characteristics in quantum dots. CdSe dots samples have been prepared and an photoluminescence experimental setup has created to measure the light emission from as a function of time laser intensity. Initial baseline measurements spectrum measured. preliminary work sets up future studies dot photobrightening, which is when emitted gradually increases with while under constant illumination. Future will investigate photobrightening intensity presence plasmonic...