HYBRID PHONON POLARITONS MIMIC TE SURFACE WAVE ENHANCED SUPERCOUPLING
Rebello, Delroy Dominic
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The study and excitation of surface plasmon polaritons SPhPs modes in polar dielectrics have attracted the interest of a wide range of research in various fields such as biology, physics and engineering. The excitation of SPhP in optical waveguides is because of TM-component of the incident light. TE-components are usually disbarred because, for TE-polarization component, orthogonal to the TM-polarization components, of the incidence waves, no SPhP mode exists. This thesis presents a novel hybrid TE SPhP mode waveguide in the mid-infrared region. By introducing a thin layer of high index dielectric material on the polar dielectric, where SPhPs are excited, pseudo surface polarization currents can be induced at this surfaces, which yield the excitation of artificial TE-mode SPhP at the interface. This TE-mode SPhP is then integrated with hybrid waveguide, where the waveguide consists of a dielectric tracer wire on a high index dielectric separated by a nano air gap that enables a capacitor like energy storage, which allows effective subwavelength transmission of the SPhP surface waves. Energy confinement is later done by introducing ENZ material in the nano air gap which reduced the mode area.