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The demand of bandwidth capacity has increased exponentially in recent years due to the rise of high-speed Internet. For low-cost Metropolitan Area Network (WAN), operating wavelength at 1.3 µm is chosen due to its low dispersive nature in the silica optical fibers, thus avoiding the need for costly dispersion compensators. Quantum dots (QDs), a self-assembly of coherently strained and defect-free three-dimensional nano-islands, are deemed as the new generation of active material. This is because one can expect better device performances due to the delta-like carrier density of states associated with the three-dimensional (3D) confinement. The most promising QD material system for 1.3 µm operation is that of InAs QDs. This book, therefore, report the study of InAs QDs for 1.3 µm electro-absorption modulators. In particular, it provides the theoretical calculations, epitaxial growth, devices fabrication and performances characterization. The materials and knowledge covered in this book are especially useful to professionals in the optoelectronics fields, and researchers who are considering the use of QD systems for optoelectronic devices.
Minority, underrepresented, and first-generation college students’ (the fastest growing population in the United states) lack of success has negative impacts for both individuals and for society as a whole. Minority students need access and support to graduate in a timely manner from four-year institutions. Financial aid provides students with access to higher education; Orientation, academic advising, tutoring, and counseling and psychology provide students with social and academic capital to successfully navigate the systems of four-year institutions. The research in this book has three objectives: (1) correlate five support services as a tool of academic success (GPA), (2) correlate five support services as a tool of success to timely graduation, and (3) predict the likelihood of two- and three-year graduation of community college transfer students in relation to students’ use of support services. Education administrators and policy makers should find this book useful in selecting services to help increase the percentage of minority students who graduate.
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