(Nanoelectronics - Plasmonics) Model experiments with, for example, microwaves and larger metal structures
Researcher and author: Dr. ( Afshin Rashid)
Note: Since the material parameters change significantly with frequency. In particular, this means that model experiments with, for example, microwaves and larger metal structures can not replace experiments with metal nanostructures at optical frequencies.
Surface charge density oscillations associated with surface nanoplasms at the interface between a metal and a dielectric can cause sharply increased near-light fields that are spatially enclosed near the metal surface. Similarly, if the electron gas is enclosed in three dimensions, such as a small particle, the general displacement of the electrons relative to the positively charged lattice leads to a restoring force, which in turn creates a specific particle-plasmon. Resonance depending on the geometry of the particle. In well-shaped particles (usually sharp), local charge accumulation associated with sharply increased light fields can occur. Alterations in some properties, such as conductivity in nanotransistors and electromagnetic properties in nanowires, may occur in dimensions of only a few nanometers.Patterning magnetic materials in arrays of nanoscale points can lead to very strong and very controllable changes in the polarization of light when the beam is reflected from the array. This discovery could increase the sensitivity of optical components for telecommunications and biosensors applications. The pairing between light and magnetism in the electrical nanostructures of Localized Surface Plasmon results from quantum nanoelectronic interactions. These interactions lead to optical magnetic effects that change properties, such as the axis of polarization or the intensity of light. Interactions between light and matter increase at the nanoscale. This is a key motivator in the plasmonics field that causes the interaction of light with metal nanostructures to lead to the construction of nanoelectronic devices.In the electrical structure of Localized Surface Plasmon nanostructures, a nanoparticle-sized metal nanoparticle acts much like an antenna for visible wavelengths. Such antennas for us in many everyday devices that work on much longer radio and microbial waves used a phenomenon called surface network amplification in which all the nanoparticles, small antennas, in unison in one They radiate arrays.
The key is to assemble longitudinal-scale magnetic nano-antennas that correspond to the wavelength of incoming light. In periodic arrays, nanoparticles strongly interact with each other, causing mass oscillations. Such behavior has already been observed in metal nanoparticles.
Conclusion :
Since the parameters of the material change significantly with frequency. In particular, this means that model experiments with, for example, microwaves and larger metal structures can not replace experiments with metal nanostructures at optical frequencies.
Researcher and author: Dr. ( Afshin Rashid)
PhD in Nano-Microelectronics