Theses and Dissertations

Date of Award

8-2019

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Physics

First Advisor

Dr. Myoung-Hwan Kim

Second Advisor

Dr. Ahmed Touhami

Third Advisor

Dr. HyeongJun Kim

Abstract

Metasurfaces promise a control of light in free and confined spaces like optical waveguides using subwavelength-scale nanostructures. In this work, we experimentally investigate a variety control of light in more confined spaces which is localized surface waves of light. A control of surface waves has been challenged because of a lack of efficient nanostructures. For example, conventional and widely used metallic nanostructures have a high coupling efficiency of light due to free charge carriers but the charge carriers induce a high optical power loss. We recently designed and fabricated metal/dielectric multilayer aperture on ionic crystal, which shows a strong resonance tuning. The device consists of thin gold/silicon multiplayer gratings on silicon carbide substrate. First, we used full wave simulation with the Finite-Difference Time-Domain (FDTD) method to understand the behavior of higher order resonance in our device. We searched for potential monopole and quadrupole modes beyond dipole modes. We designed a special setup for angle illumination and detection measurement integrated with Fourier Transform Infrared spectrometer (FTIR). We measured infrared spectrum of the device to investigate higher order localized surface phonon polariton modes.

Comments

Copyright 2019 Md Litan Ali. All Rights Reserved.

https://go.openathens.net/redirector/utrgv.edu?url=https://www.proquest.com/dissertations-theses/search-high-order-excitation-surface-phonon/docview/2312584793/se-2?accountid=7119

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