Acknowledgements I would like to express my deep appreciation to my supervisor, Dr. Dennis G. Deppe, for leading me into the exciting semiconductor laser field and for his inspiring and insightful guidance throughout this course of research. In addition, I would like to thank my excellent committee members, Dr. learned semiconductor processing and MBE crystal growth 101 from them, and also rece...

We report on three-dimensional optical trapping of single ions in a one-dimensional optical lattice formed by two counterpropagating laser beams. We characterize the trapping parameters of the standing-wave using the ion as a sensor stored in a hybrid trap consisting of a radio-frequency (rf), a dc, and the optical potential. When loading ions directly from the rf into the standing-wave trap, w...

To enhance lasers’ power and improve their performance, a model wasapplied for the waveguide design of 400 nm InGaN/InGaN semiconductor laser, whichis much easier to implement. The conventional and new laser structures weretheoretically investigated using simulation software PICS3D, which self-consistentlycombines 3D simulation of carrier transport, self-heating, and opt...

The terahertz region (1-10 THz) has potential applications in many areas, such as chemical sensing, medical imaging and free-space optical communications. With the demonstration of terahertz sources, it is quite necessary to develop the detection technology in terahertz. Here we propose an electrically tunable quantum dot infrared photodetector to detect the terahertz region. The proposed detec...

the geometry effect of the structure is put in profile during the survey of an important criteria of these fibers namely the confinement loss. To optimize an optical fiber structure constituted with a doped core, the value of confinement loss must be as low as possible; a new structure is introduced in our analysis. It is a structure formed by a doped core surrounded by a cladding which is comp...