D.Ing. (Electrical and Electronic Engineering) / Conventional power electronic circuits consist of discrete semiconductor devices, tronsformers and reactive components, interconnected according to a circuit diagram. However, as the switching frequencies increase and the weight and volume constraints become more stringent, this traditional approach becomes very limiting. Silicon based IC technology and its high voltage version, HVIC, have made more compact converters possible, but the major reactive elements, such as inductors, capacitors and transformers. must still be constructed and connected discretely ...

by Suen Wai Mo. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1980. / Bibliography: leaves 96-99.

by Ching Shuk Chi, Emily. / Parallel title in Chinese characters. / Thesis (M.Ph.)--Chinese University of Hong Kong, 1988. / Bibliography: leaves 90-92.

Lau Pak Hong = 在介電質微空腔中的自發原子躍遷 / 劉柏康. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2006. / Includes bibliographical references (leaves 145-149). / Text in English; abstracts in English and Chinese. / Lau Pak Hong = Zai jie dian zhi wei kong qiang zhong de zi fa yuan zi yao qian / Liu Bokang. / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Background --- p.1 / Chapter 1.2 --- Convention --- p.5 / Chapter 2 --- The Hamiltonian of the System --- p.7 / Chapter 2.1 --- Quantization of Electromagnetic Field in the Presence of Dielectric Media --- p.7 / Chapter 2.1.1 --- Basic Equations --- p.8 / Chapter 2.1.2 --- Canonical Quantization --- p.10 / Chapter 2.1.3 --- Eigenmode Expansion --- p.11 / Chapter 2.2 --- Atom-Field Interaction --- p.15 / Chapter 2.2.1 --- The Atom --- p.16 / Chapter 2.2.2 --- The Interaction --- p.18 / Chapter 3 --- Application to Spherical Cavity --- p.20 / Chapter 3.1 --- Local Density of States --- p.20 / Chapter 3.2 --- Field Modes --- p.22 / Chapter 3.3 --- Dynamics of a Single Atom --- p.26 / Chapter 3.4 --- Dynamics of Two Atoms --- p.31 / Chapter 4 --- Quantization of Electromagnetic Field in the Presence of Dispersive and Absorptive Dielectrics --- p.39 / Chapter 4.1 --- Formalism --- p.40 / Chapter 4.1.1 --- Failure of the Mode of Universe Approach --- p.40 / Chapter 4.1.2 --- Quantization --- p.41 / Chapter 4.2 --- Spontaneous Emission --- p.43 / Chapter 4.3 --- Relationship to Classical Treatment --- p.46 / Chapter 4.3.1 --- Emission Rate and Power --- p.47 / Chapter 4.3.2 --- Intensity --- p.48 / Chapter 5 --- The Finite-Difference Time-Domain Algorithm --- p.52 / Chapter 5.1 --- Basic Algorithm --- p.53 / Chapter 5.2 --- Perfectly Matched Layer Boundary Conditions --- p.57 / Chapter 5.2.1 --- Properties of PML Medium --- p.58 / Chapter 5.2.2 --- Discretization of PML Medium --- p.61 / Chapter 5.2.3 --- Corner Regions --- p.63 / Chapter 5.3 --- Material Boundary --- p.64 / Chapter 5.4 --- Stability Analysis --- p.68 / Chapter 5.4.1 --- The Courant Condition --- p.68 / Chapter 5.4.2 --- Numerical Dispersion --- p.71 / Chapter 5.5 --- Sources --- p.72 / Chapter 5.5.1 --- Volume Factor --- p.73 / Chapter 5.5.2 --- The Dyadic Green Functions --- p.75 / Chapter 5.5.3 --- Lorentzian Source --- p.76 / Chapter 5.5.4 --- Sinusoidal Source --- p.81 / Chapter 5.5.5 --- Gaussian Source --- p.85 / Chapter 5.5.6 --- Poynting Flux Calculation --- p.87 / Chapter 5.5.7 --- Comparison and Discussion of the Method --- p.87 / Chapter 6 --- Application to Different Geometries --- p.90 / Chapter 6.1 --- Bulk Material --- p.91 / Chapter 6.2 --- Sphere --- p.92 / Chapter 6.3 --- Circular Disk --- p.98 / Chapter 6.4 --- Pentagonal Cavity --- p.104 / Chapter 6.5 --- Elliptic Disk --- p.112 / Chapter 6.5.1 --- Axial Dipole --- p.117 / Chapter 6.5.2 --- Radial Dipole --- p.119 / Chapter 6.5.3 --- Intensity --- p.120 / Chapter 6.6 --- Quadrupole Disk --- p.123 / Chapter 6.6.1 --- Axial Dipole --- p.129 / Chapter 6.6.2 --- Radial Dipole --- p.131 / Chapter 6.6.3 --- Comparison of the Elliptic and Quadrupole Disks --- p.132 / Chapter 7 --- Application to Absorptive and Gain Media --- p.135 / Chapter 7.1 --- Sign of Relative Permittivity of Absorptive and Gain System . . --- p.137 / Chapter 7.2 --- FDTD Algorithm for Gain and Loss --- p.138 / Chapter 7.3 --- Results and Discussions --- p.138 / Chapter 8 --- Conclusion --- p.142 / Bibliography --- p.145 / Chapter A --- Imaginary Part of the Green Function --- p.150 / Chapter B --- The Pade Approximation --- p.151

Lai Kam Kwong. / Thesis (M.Sc.)--Chinese University of Hong Kong. / Bibliography: leaves 86-89.

No description available.

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

Cheung Wing Yi = 介電材料界面附近的局域場分佈 / 張詠怡. / Thesis submitted in: October 2004. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2005. / Includes bibliographical references (leaves 81-85). / Text in English; abstracts in English and Chinese. / Cheung Wing Yi = Jie dian cai liao jie mian fu jin de ju yu chang fen bu / Zhang Yongyi. / Chapter 1 --- Introduction --- p.2 / Chapter 2 --- Fundamentals --- p.10 / Chapter 2.1 --- Local Field --- p.10 / Chapter 2.2 --- Clausius-Mossotti Equation --- p.12 / Chapter 3 --- Multi-layer Formulation --- p.14 / Chapter 3.1 --- Developed Lekner Summation Method --- p.15 / Chapter 3.2 --- Formulation --- p.16 / Chapter 3.2.1 --- Interlayers --- p.16 / Chapter 3.2.2 --- Multi-layers --- p.22 / Chapter 3.3 --- Comparision with Ewald-Kornfeld Formulation --- p.26 / Chapter 3.4 --- Contact with macroscopic concepts --- p.30 / Chapter 4 --- Local Field Distribution near Sharp Interfaces --- p.32 / Chapter 4.1 --- Body-centered Tetragonal Lattices --- p.33 / Chapter 4.2 --- Simple Tetragonal and Body-centered Tetragonal Lattices --- p.39 / Chapter 4.3 --- Effects of Geometric Anisotropy --- p.43 / Chapter 5 --- Local Field Distribution for Graded Materials --- p.52 / Chapter 5.1 --- Bare Polarizability Gradient --- p.53 / Chapter 5.2 --- Temperature Gradient --- p.58 / Chapter 6 --- Optical Response for Drude Dielectric Gradation Profile --- p.63 / Chapter 7 --- Summary --- p.72 / Chapter A --- Lekner summation method --- p.74 / Chapter B --- Ewald-Kornfeld Formulation --- p.78 / Chapter C --- Langevin-Debye Equation --- p.81

Tam Hak Fui = 周期性界面附近的局域场分布 / 谭克奎. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2003. / Includes bibliographical references (leaves 70-72). / Text in English; abstracts in English and Chinese. / Tam Hak Fui = Zhou qi xing jie mian fu jin de ju yu chang fen bu / Tan Kekui. / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Motivation and review on related work --- p.1 / Chapter 1.2 --- Objectives of the thesis --- p.4 / Chapter 2 --- The Green's function formalism (GFF) --- p.6 / Chapter 3 --- Application of GFF to one-dimensional periodic interface --- p.10 / Chapter 3.1 --- The structure Green's function - Greenian --- p.10 / Chapter 3.2 --- Solution by mode expansion --- p.15 / Chapter 3.3 --- Numerical results --- p.16 / Chapter 3.3.1 --- An illustration of the formalism: potential and electric field obtained --- p.16 / Chapter 3.3.2 --- "A numerical integration technique, triangular function and Fourier series as mode function" --- p.21 / Chapter 3.3.3 --- More results for different u --- p.28 / Chapter 3.3.4 --- Geometric resonance and analysis of M --- p.30 / Chapter 3.3.5 --- Computation requirement --- p.33 / Chapter 4 --- Application of GFF to two-dimensional periodic interface --- p.37 / Chapter 4.1 --- The formalism --- p.37 / Chapter 4.2 --- Solution by mode expansion --- p.43 / Chapter 4.3 --- Technical details in summing the series - points to be noticed --- p.44 / Chapter 4.4 --- Numerical results --- p.49 / Chapter 4.4.1 --- Step function as mode function --- p.49 / Chapter 4.4.2 --- The two-dimensional formulation reproduces previous results --- p.51 / Chapter 4.4.3 --- The interface with ripples added --- p.55 / Chapter 4.4.4 --- A truly two-dimensional periodic interface --- p.59 / Chapter 4.4.5 --- Computational limitation --- p.61 / Chapter 4.4.6 --- Geometric resonance --- p.65 / Chapter 5 --- Conclusion --- p.68 / Bibliography --- p.70 / A Proof of two identities --- p.73

Diffractive optical elements (DOEs) are thin, light-weight devices capable of shaping light both spatially and spectrally. Classical light is a multivariate vector field: at each wavelength and at each point in space, it is characterized an amplitude and phase for two orthogonal polarizations. “Metasurfaces” are a class of DOEs composed of subwavelength structures engineered to alter a featureless wavefront into a custom wavefront; a multivariate metasurface may control several parameters simultaneously and independently. If limited to low-loss dielectric materials, metasurfaces promise functionalities and efficiencies unparalleled in other DOEs, and are manufacturable by mature micro- and nanofabrication methods. Here, we expand the capabilities of metasurfaces to generate multivariate wavefronts. By engineering both the phase and the phase dispersion, we experimentally demonstrate metasurfaces focusing light to a single point independently of wavelength or polarization. By tuning the structural birefringence and in-plane orientation angle of rectangular nanostructures, we experimentally demonstrate arbitrary control of both phase and amplitude, enabling holography as it was originally envisioned. By maximizing the in-plane Bragg scattering of a Photonic Crystal Slab, and then successively adding symmetry-breaking perturbations to the otherwise perfect lattice, we may control angular dependence, optical lifetime, and polarization dependence of up to four optical resonances simultaneously and independently (which we study using Group Theory and fullwave simulations). By spatially varying the perturbations, the wavefronts at the resonance frequencies may be spatially tailored while the non-resonant frequencies are unaffected, promising DOEs uniquely suitable for augmented reality applications.