Kwok Tsun Ah Joseph = 界面及梯度物料的介電性質的研究 / 郭俊雅. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2005. / Includes bibliographical references (leaves 59-64). / Text in English; abstracts in English and Chinese. / Kwok Tsun Ah Joseph = Jie mian ji ti du wu liao de jie dian xing zhi de yan jiu / Guo Junya. / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- A Review of Composite Materials --- p.1 / Chapter 1.2 --- Graded Colloidal Crystals --- p.4 / Chapter 1.3 --- Long Range Interaction and Local Field Distribution --- p.6 / Chapter 1.4 --- Objective of the Thesis --- p.8 / Chapter 2 --- Local Field Determination in Bulk Periodic Systems --- p.10 / Chapter 2.1 --- Handling the Long Range Interaction --- p.10 / Chapter 2.1.1 --- The Three-dimensional Ewald Summation (EW3D) --- p.10 / Chapter 2.1.2 --- The Two-dimensional Ewald Summation (EW2D) --- p.13 / Chapter 2.1.3 --- The Lekner Summation --- p.14 / Chapter 2.2 --- Local Field Theory --- p.17 / Chapter 2.3 --- Results and Discussion --- p.19 / Chapter 2.4 --- Conclusion --- p.23 / Chapter 3 --- Multi-layer Formulation and Local Field Calculation --- p.26 / Chapter 3.1 --- A Model System --- p.26 / Chapter 3.2 --- Interlayer Interaction --- p.28 / Chapter 3.3 --- Multilayer Self-consistent Formalism --- p.30 / Chapter 3.4 --- Summary --- p.31 / Chapter 4 --- Optical Response of Graded Materials and Interfaces --- p.33 / Chapter 4.1 --- Constructing Graded Colloidal Crystals --- p.33 / Chapter 4.1.1 --- Coated Metallic Spheres --- p.34 / Chapter 4.1.2 --- Drude Dielectric Gradation Profiles --- p.35 / Chapter 4.2 --- Results and Discussion --- p.36 / Chapter 4.2.1 --- Optical Absorption of Graded Colloidal Crystals of Different Structures --- p.36 / Chapter 4.2.2 --- Optical Absorption of Colloidal Interfaces --- p.44 / Chapter 4.2.3 --- Graded Spherical Colloids in Dimer-arrays --- p.49 / Chapter 4.3 --- Other Kinds of Graded Colloidal Crystals and Interfaces --- p.51 / Chapter 4.3.1 --- Coated or Multi-coated Spherical Colloidal Crystals --- p.51 / Chapter 4.3.2 --- Coated Colloidal Crystals with a Radii-Gradient in the Cores --- p.52 / Chapter 4.3.3 --- Composites of Inclusions Other than Spheres --- p.53 / Chapter 4.3.4 --- Hairy interfaces --- p.53 / Chapter 4.4 --- Summary --- p.54 / Chapter 5 --- Conclusion --- p.57 / Bibliography --- p.59 / Chapter A --- Useful Expressions for the Lekner Summation Method --- p.65 / Chapter B --- Lorentz Cavity --- p.68 / Chapter C --- Two Mathematical Proofs --- p.70 / Chapter C.1 --- Proof of Tk『=Tk =-2Tkzz --- p.70 / Chapter C.2 --- Proof of the Sum Rule of Σk=-NTk = 4π for Large N in a Simple Cubic Structure --- p.71 / Chapter D --- The Ewald-Kornfeld Formulation --- p.74

Zhuang, Junping = 單根納米線的軸向局域的光學性質 / 庄俊平. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2011. / Includes bibliographical references. / Abstracts in English and Chinese. / Zhuang, Junping = Dan gen na mi xian de zhu xiang ju yu de guang xue xing zhi / Zhuang Junping. / Acknowledgement --- p.I / Abstract --- p.II / 摘要 --- p.IV / Contents --- p.i / List of Figures --- p.iv / List of Tables --- p.viii / Abbreviations --- p.ix / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Background --- p.1 / Chapter 1.2 --- ZnSe Semiconductor Nanowires --- p.2 / Chapter 1.3 --- Carrier Dynamics in Semiconductor Nanowires --- p.3 / Chapter 1.3.1 --- Carrier Relaxation --- p.3 / Chapter 1.3.2 --- Surface Effects on Carrier Recombination --- p.7 / Chapter 1.4 --- Principle ofTCSPC Technique --- p.9 / Chapter 1.5 --- Motivations and Works --- p.10 / References --- p.12 / Chapter Chapter 2 --- Experiments --- p.17 / Chapter 2.1 --- Growth of ZnSe Nanowires --- p.17 / Chapter 2.2 --- Measurements with Electron Microscopes --- p.17 / Chapter 2.3 --- Measurements by a Laser Scanning Microscope --- p.18 / Chapter 2.3.1 --- Experimental Setup --- p.18 / Chapter 2.3.2 --- Settings of Measurements --- p.23 / References --- p.25 / Chapter Chapter 3 --- Methods of Analysis --- p.26 / Chapter 3.1 --- Luminescence Intensity --- p.26 / Chapter 3.1.1 --- Intensity Detected by PMT --- p.27 / Chapter 3.1.2 --- Intensity Detected by SPAD --- p.28 / Chapter 3.2 --- Lifetime Histogram --- p.29 / Chapter 3.2.1 --- Pixel Binning --- p.29 / Chapter 3.2.2 --- Lifetime Fitting --- p.32 / References --- p.33 / Chapter Chapter 4 --- Results and Discussion --- p.34 / Chapter 4.1 --- "Morphology, Structure and Composition of As-Grown Nanowires" --- p.34 / Chapter 4.2 --- Cathodoluminescence of Individual ZnSe Nanowires --- p.36 / Chapter 4.3 --- Photoluminescence of ZnSe Nanowires --- p.36 / Chapter 4.4 --- Luminescence of Individual Nanowires --- p.39 / Chapter 4.4.1 --- Luminescence of As-Grown Nanowires --- p.39 / Chapter 4.4.2 --- Nonlinear Optical Properties --- p.42 / Chapter 4.5 --- Luminescence Lifetimes of Individual Nanowires --- p.47 / Chapter 4.5.1 --- Power Dependence --- p.48 / Chapter 4.5.2 --- Chemical Environments --- p.53 / Chapter 4.5.3 --- Concentration of Ammonium Sulfide Solution --- p.56 / Chapter 4.6 --- Axially Resolved Luminescence Lifetimes --- p.60 / Chapter 4.6.1 --- Axially Resolved 2D Decay Diagrams --- p.60 / Chapter 4.6.2 --- Axially Resolved Luminescence Lifetimes --- p.62 / Chapter 4.6.3 --- (TNBE) and T1 of DL Emission --- p.69 / References --- p.72 / Chapter Chapter 5 --- Conclusions --- p.76 / Appendix A --- p.79 / Chapter A.1 --- Laser Beam Diameter and Spatial Resolution --- p.79 / Chapter A.2 --- Instrument Response Function of TCSPC module --- p.81 / Chapter A.3 --- Photo-Injection --- p.82 / Chapter A.3.1 --- Two-Photon Excitation by Pulse Laser --- p.82 / Chapter A.3.2 --- One-Photon Excitation by CW UV Laser --- p.84 / Chapter A.4 --- Lifetime Distributions --- p.85 / References --- p.86 / Appendix B Supporting Data --- p.87

A research report submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg in partial fulfilment of the requirements for the degree of Master of Science / The aim of this work was to evaluate the measurement of the optical properties as a means of obtaining information on the growth history of synthetic diamond. A suite of sample of known synthesis origin representing the different types of commercially produced synthetic diamond was analysed hy photoluminescence. The photoh.{fnmescence intensity was normalising by using the area of tbe Raman peak. This allowed a semi-quantitative comparison of the defect concentration. Three photoluminescent centres were identified, H3, 575 run and 1.945 eV (with zero-phonon lines at 2.463 eV, 2.156 eV, and 1.945 eV respectively). Differences between the intensities of the luminescence due to these centres were observed as a function of the type ot diamond The H3 amd the 1.945 eV intensity was found to increase with the proportion of cubic growth sector, In addition the 1.945 eV intensity was found to increase with heat treatment and was higher in (100) than in (111) growth sectors. As all three defects detected involve vacancies and nitrogen impurity, an analysis was done to quantify any correlation between the luminescent intensities from the different defects in the same SDA powder sample. The 1.945 eV and 575 run intensities were observed to be correlated .. An additional correlation 'was found between the 575 lim and the H3 intensities in the case of finer particle size samples. The luminescence intensity for all three defect types was observed to be a function of the particle size of the sample. The shapes and widths of zero-phonon lines were related to the types and concentration of lattice defects present in a crystal according to line broadening theory. An attempt was made to explain the results in the context of the known synthesis origin and growth conditions. / AC 2018

Typescript (photocopy) / 122 leaves, [7] leaves of plates : ill. ; 27 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.) Dept. of Physics, University of Adelaide, 1977

Graduation date: 1974

published_or_final_version / Physics / Doctoral / Doctor of Philosophy

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