Studies of Electromagnetic and Optical Properties in Some Metamaterial-Based Photonic Structures

  • 吳 孟儒

Student thesis: Doctoral Thesis

Abstract

This dissertation is theoretically devoted to the studies of photonic properties in the ferroelectric material Lithium Tantalate (LiTaO3) semiconductor metamaterial composed of Al-doped ZnO (AZO) and ZnO and negative refraction in an interface between a dielectric and a single-negative (SNG) material First we investigate the far-infrared (FIR) wave properties for a ferroelectric material Lithium Tantalate (LiTaO3) The analysis has been done based on the calculated surface impedances for three model structures i e material occupying semi-infinite space (structure I) material of a slab immersed in free space (structure II) and a layered structure made of film on a dielectric substrate (structure III) Besides photonic band gap (PBG) structure for a polaritonic photonic crystal (PPC) containing Lithium Tantalate (LiTaO3) in negative refractive index (NRI) region has also been theoretically investigated This region consists of a narrow frequency range of anomalous dispersion and a wide range of normal dispersion The result shows that such PPC has a multiple-PBG structure with one gap locating in the anomalous dispersion region and others in the normal dispersion region Next we theoretically investigate the near-infrared (NIR) photonic band structure (PBS) in a one-dimensional semiconductor metamaterial (MM) photonic crystal (PC) The considered PC is (AB)N where N is the stack number A is a dielectric and B is a semiconductor MM composed of Al-doped ZnO (AZO) and ZnO For oblique incidence under transverse magnetic mode it is found that due to the anisotropic permittivity of semiconductor metamaterial there exist multiple longitudinal plasmon polariton gaps which are ascribed to the coupling between photon mode and metamaterial bulk electric plasmon The properties of defect modes in a defective photonic crystal containing a semiconductor metamaterial defect are also elucidated We consider the structure (LH)N/DP/(LH)N where N and P are respectively the stack numbers L is SiO2 H is InP and defect layer D is a semiconductor metamaterial composed of Al-doped ZnO (AZO) and ZnO Finally we theoretically investigate the properties of negative refraction in an interface between a dielectric and a single-negative (SNG) material The kinds of SNG materials epsilon-negative (ENG) and mu-negative (MNG) will be considered respectively The phenomenon of negative refraction (NR) can be seen due to the presence of negative refractive angle calculated by making use of the inhomogeneous wave theory
Date of Award2014 Dec 26
Original languageEnglish
SupervisorShoou-Jinn Chang (Supervisor)

Cite this

Studies of Electromagnetic and Optical Properties in Some Metamaterial-Based Photonic Structures
孟儒, 吳. (Author). 2014 Dec 26

Student thesis: Doctoral Thesis