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Semiconductor nanowires and their potential applications will be discussed. How these nanowires can be synthesized and how the shape, size and composition of the nanowires influence their structural and optical properties will be presented. I will present results on lasers, THz detectors and solar cells.
We investigate the optical and transport properties of single GaAs/AlGaAs core-multishell Quantum Well Tube (QWT) nanowire heterostructure. The QWT is defined by a thin (8 nm) GaAs layer embedded inside a thick Al0.4Ga0.6As shell which surrounds a 50 nm diameter GaAs NW core see Fig.1. The electrons and holes in the thin GaAs shell are radially confined and are free along the nanowire length. The...
A flexible, stable coherent multi-dimensional spectroscopy apparatus using spatial light modulators to shape beams temporally and spatially is developed and used to characterize coherent coupling dynamics in asymmetric GaAs double quantum wells.
Even with the presence of modern obstetric care, stillbirth rate seems to stay stagnant or has even risen slightly in countries such as England and has become a significant public health concern [1]. In the light of current medical research, maternal risk factors such as diabetes and hypertensive disease were identified as possible risk factors and are taken into consideration in antenatal care. However,...
A large square resonator with a size of 8.3 mum can support many resonant modes, including whispering gallery modes. The inclusion of trenches at judicious node positions of a selected mode will not significantly affect this mode (i.e., its quality factor will not be significantly reduced) while the remaining modes will drastically lose power through radiation. Since most of the modes will not be...
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