Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/132193
Title: DEVELOPMENT OF HIGH QUALITY FACTOR PHOTONIC CRYSTAL NANOBEAM CAVITIES
Authors: LIN TONG
Keywords: Optical cavity,photonic crystals, NEMS, Fano resonance
Issue Date: 8-Aug-2016
Source: LIN TONG (2016-08-08). DEVELOPMENT OF HIGH QUALITY FACTOR PHOTONIC CRYSTAL NANOBEAM CAVITIES. ScholarBank@NUS Repository.
Abstract: The rapid development of micro/nano fabrication techniques has enabled the realization of a new generation of devices that have the same functionality as previous ones, but with greatly reduced footprints. One such group of devices are photonic crystal (PhC) nanobeam cavities, which have emerged as promising configurations that pattern photonic crystals on waveguides. This thesis describes a study of optical resonators based on these configurations, whereby PhC nanobeam cavities following theprevailing deterministic method are fabricated and their characteristics and performance experimentally verified. Based on this platform, the optomechanics and in-plane rotation of doubly-coupled PhC nanobeam cavities integrated with nano-electro-mechanical-systems (NEMS) are studied and demonstrated. Additionally, the dynamic control of the asymmetric Fano lineshape in PhC nanobeam cavities and waveguide Fabry-Perot cavities is achieved and a design method proposed for slotted PhC nanobeam cavities that may be applied for biosensing in aqueous environment. Several innovative processes and design methods resulting from the research and development processes are described in this thesis, i.e., a novel and efficient method of designing PhC split-beam nanocavities with high optical Q-factors, and the investigation of the phenomenon of cavity optical resonance through the structures’ lateral and longitudinal directions and the effects of its out-of-plane deformations. Other novel approaches are the introduction of Fano resonance into the PhC split-beam nanocavity, which is shown to increase the Q-factor three-fold, and a method of decoupling the optomechanical and thermo-optic effects in doubly-coupled PhC split-beam nanocavities.
URI: http://scholarbank.nus.edu.sg/handle/10635/132193
Appears in Collections:Ph.D Theses (Open)

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