Thesis (Ph.D.)--McMaster University, 2004. / Advisor: Dr. Harold K. Haugen. Includes bibliographical references (p. 108-111). Also available via World Wide Web.

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Thesis (Ph.D.)--Chinese University of Hong Kong ,2001. / Includes bibliographical references. / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese.

by Ng Po Yin. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1996. / Includes bibliographical references (leaves 57-59). / by Ng Po Yin. / Acknowledgments --- p.I / Abstract --- p.II / Table of contents --- p.III / Chapter Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Interest in ZnxCd1-xSe/InP --- p.1 / Chapter 1.2 --- Our work --- p.2 / Chapter 1.3 --- Usefulness of PL --- p.4 / Chapter 1.4 --- Growth conditions of ZnSe/GaAs and ZnxCd1-x/InP --- p.4 / Chapter 1.5 --- Purposes of studying ZnSe/GaAs --- p.5 / Chapter 1.6 --- Inhomogeneity of ZnxCd1-xSe/InP --- p.5 / Chapter Chapter 2 --- Experimental setup and procedures --- p.7 / Chapter 2.1 --- Experimental setup --- p.7 / Chapter 2.2 --- Measurements performed --- p.10 / Chapter 2.3 --- Experimental procedures --- p.10 / Chapter Chapter 3 --- Results and discussion --- p.12 / Chapter 3.1 --- RT and 9K PL of ZnSe/GaAs --- p.12 / Chapter 3.2 --- "Excitation power density dependent, RT and 9K PL of ZnxCd1-xSe/InP" --- p.20 / Chapter 3.3 --- Temperature dependent PL of ZnSe/GaAs and ZnxCd1-xSe/InP --- p.45 / Chapter Chapter 4 --- Conclusions and future work --- p.55 / References --- p.57

Originally presented as the author's thesis (Swiss Federal Institute of Technology), Diss. ETH No. 13547. / Summary in German and English. Includes bibliographical references.

A pulse-laser based time-resolved photocurrent (TRPC) and photoluminescence (TRPL) system with a programmable Boxcar integrator/averager system incorporated was implemented to investigate the optical properties and charge carrier dynamics in a GaInP/GaAs single-junction photovoltaic device for the purposes of understanding fundamental optoelectronic processes in the solar cell. The implementation of whole system was realized by integrating the instrument of a Boxcar averager system with a pulse laser source + spectroscopic facilities. The delay time control and data acquisition were organized by the software code. The effects of the hardware configurations and the software parameters on the performance of the system were particularly addressed for the optimization of measurement conditions and precisions. Two main functions of TRPC and TRPL with a wide time range were demonstrated for the system. The system was employed to measure temperature- and bias voltages-dependent TRPC and TRPL spectra of a GaInP/GaAs single-junction photovoltaic device. The spectral data show a lot of information about the transient dynamic behaviors of photogenerated charge carriers in the device, including both the rise and decay processes. Interestingly, the measured time-resolved photocurrent curves are characterized by a fast rising edge followed by a relatively slow decay process as the temperature increases. Relevant theoretical calculations and analysis to the experimental curves were also carried out to understand diffusion and transport processes of charge carriers inside the device. The results show that the variation in temperature and reverse biases results in the structural change in the space charge region of the P-N junction and therefore affects the rise and decay time constants of the time-resolved photocurrent. The TRPL spectral data give information of mid-way radiative recombination of charge carriers in the device. / published_or_final_version / Physics / Master / Master of Philosophy

This dissertation investigates challenges associated with optics in the 10-500 wavelength size regime. For the visible spectrum, this size range (5-250um) is classified as micro-optics, but is set apart from other size ranges by a noticeable lack of suitable simulation and metrology tools. Optics of this size are gaining popularity in applications such as solid immersion lenses (SIL) and laser beam shaping, but require more research into simulation, testing, fabrication, and assembly in order to be easily integrated into commercial applications.A survey of previous work on SILs and micro-optics simulation/testing is given, including past work with gallium phosphide (GaP) microlenses. A new SIL aberration treatment is described using spherical-parent 3rd order aberrations. Agreement is shown with previous work, and the lack of hemisphere approximations gives a broader understanding of aberrations for varying SIL thicknesses. Results show that aberration reduces with lens radius, but thickness tolerances become tighter as dimensions shrink. A study of GaP intrinsic birefringence and the theoretical impact on the induced polarization signal is also given.A survey of beam propagation simulators is given and a sequential piece-wise diffraction (SPWD) simulator is developed for arbitrary optical systems that overcomes the difficulties of simulation in the 10-500 wavelength size regime. A discussion of a future extension to the work to determine reflected and transmitted field amplitudes with a non-sequential method is presented with specific discussion on the challenges of electric field surface transfer.The design and operation of a micro-interferometer is discussed and testing results from the first sub-100um diameter GaP SILs are shown. A novel method for determining the shape profile of aspheric surfaces using information from annular fringes is presented. Theoretical beam shaping applications for micro GaP lenses is also discussed with results using the SPWD method. Experimental results are also shown for a 1x1x0.3mm beam shaper package that images a laser diode beam to an approximate size of 60um at a working distance of 4mm.Finally, designs and experimental results are shown for the integration of GaP micro-optics into conventional systems as SILs or beam-shaping elements including methods and equipment for lapping and polishing GaP.

Thesis (Ph.D.)--McMaster University, 2005. / Supervisor: Daniel Cassidy. Includes bibliographical references (p. 199-211).