Mahi R Singh
Western University, Canada
Title: A study of biophotonic sensors in metallic nano-hole structures
Biography
Biography: Mahi R Singh
Abstract
A large amount of research on plasmonics has been devoted to noble metal nanostructures, which to control electromagnetic energy flow on nanometer length scales. Metallic nanostructures have applications in biophotonics and sensing. Recently, there is an interest in studying surface plasmon polaritons (SPPs) in metallic nano-hole structures experimentally and theoretically. They provide simple way to excite SPPs at perpendicular incidence without varying the angle of the incident beam. It is found that these structures transmit more radiation than that of incident light due to the presence of SPPs in these structures.We have investigated theoretically and experimentally the transmission of light in metallic nano-hole structures in the presence of SPPs. The transmission spectrum is measured for several samples having different radii and periodicities. We found that the spectrum has several peaks. The effective dielectric constant of this structure is calculated by using the transmission line theory. Using effective dielectric constant, the SPPs are calculated using the transfer matrix method and it is found that the SPP energies are quantized. The transmission expression is compared with experimental results.We found that the location of the transmission peaks can be modified by depositing biomaterials. These results can be used to make nanosensors for medical and engineering applications.
