Efficient simulations and statistical analysis of physical characteristics of dispersive ensembles of semiconductor nano-objects

2^nd International Conference and Exhibition on Materials Science & Engineering

October 07-09, 2013 Hampton Inn Tropicana, Las Vegas, NV, USA

Oleksandr Voskoboynikov

Accepted Abstracts: J Material Sci

Abstract :

Impressive development of modern semiconductor nano-technologies makes it possible to fabricate semiconductor nano- objects (quantum dots, quantum rings, quantum dot molecules, quantum dot posts, nano-rods, etc.) with very sophisticated shapes and material compositions. Incorporating controllable and tunable nano-objects into nano-structured systems and meta- materials leads to tunable (on the quantum level) properties of the systems. It is well known, that in nano-optics, nano-medicine, and for quantum information processing, we need systems assembled from many all uniform and regular nano-sized elements. Unfortunately, the inherent dispersion of parameters (shape, size and material composition) leads to fluctuations (sometimes uncontrollable) of the physical characteristics of macro-systems combined from the nano-objects. In this talk, we present and discuss a general theoretical description of the physical characteristics of dispersive ensembles of semiconductor nano-objects with complex geometries and material compositions. The description is based on the mapping and hybrid multiscale (hierarchical) methods (recently derived by us) and the multi-parametric (multivariate) statistical analysis, which cumulatively reproduces the physical characteristics of ensembles of semiconductor nano-objects with dispersion in geometry, material parameters, and spatial distributions. We demonstrate the description efficiency by applying our approach to obtain the magnetic and magneto- optical responses of dispersive ensembles of semiconductor self-assembled quantum rings and the absorption cross section of ensembles of core/shell quantum dots. We have effectively simulated the actual magnetic and magneto-optical characteristics in a very good agreement with recent experimental data. Our approach can be used for optimization of the averaged physical characteristics of dispersive ensembles of semiconductor nano-objects.

Biography :

Oleksandr Voskoboynikov received his doctor degree in Semiconductor Theory from the National Taras Shevchenko University of Kyiv, Ukraine in 1983. In 1997, he was awarded with the State Prize of Ukraine for Science and Technology. He is currently with the National Chiao Tung University, Hsinchu, Taiwan. His current research interests include theory of electronic and optical quantum processes in semiconductor nano- structures: Self-consistent calculation of the response functions of semiconductor nano-structures; magneto-optics of semiconductor nano-objects and metamaterials made from them. He has published more than 150 papers in refereed journals, two books, and few book chapters.