Electronic Thesis and Dissertation Repository

Degree

Master of Science

Program

Physics

Supervisor

Dr. Mahi R. Singh

2nd Supervisor

Dr. Jeffrey Carson

Joint Supervisor

Abstract

The interaction of light with metallic nano-hole array structures enable excitation of surface plasmon polaritons at any angle of incidence. Nano-hole array structure can transmit more radiation than incident light due to the presence of surface plasmon polaritons. This phenomenon has opened up possibilities for a wide range of applications such as Surface Plasmon Resonance sensing and Surface Enhanced Raman spectroscopy. In this thesis, quantum scattering theory and quantum density matrix method are employed to assess optical transmission of metallic nano-hole array structures. The scattering cross section spectrum is calculated for nano-hole array structures with different nano-hole radii and periodicities and the transmission coefficient is calculated for different angles of incidence. It is found that each measured spectrum has several peaks due to surface plasmon polaritons and the surface plasmon polaritons spectral peaks are dependent on the array periodicity, radius of the nano-holes and the angle of incidence of light. The theoretical predictions are compared with the experimental results and it is found that there is a good agreement between experiments and theory. The transmission and reflection coefficient of coupler made up of nano-hole array structure is studied and it is found that by modifying the periodicity of the nano-holes, the reflection and transmission properties of the coupler is changed.

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