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The author develops the effectivemass theory of excitons in lowdimensional semiconductors and describes numerical methods for calculating the optical absorption including Coulomb interaction, geometry, and external fields. The theory is applied to Fano resonances in lowdimensional semiconductors and the Zener breakdown in superlattices. Comparing theoretical results with experiments, the book is essentially selfcontained; it is a handson approach with detailed derivations, worked examples, illustrative figures, and computer programs. The book is clearly structured and will be valuable as an advancedlevel selfstudy or course book for graduate students, lecturers, and researchers.
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