This work explores spectroscopic principles of rare earth ions and transition metal ions doped in solids as active ions of lasers and luminescent emissions. Coverage progresses from elements of atomic spectroscopy and basic mathematical theory of symmetry, through rare earth ions, light emission and absorption, lattice vibration, nonradiative transition, and spectroscopic properties of rare earth ions in nanocrystals. Five appendixes provide mathematical tables. The book derives all calculation formulas from first principles of physics. Unlike other books, discussions in this book are based on the fact that the media environment of active ions is composed of host materials instead of a vacuum. The book can be used as a reference for researchers in solid-state physics, spectroscopy, and laser and luminescent science and technology, and as a supplemental text for advanced undergraduate and postgraduate students with some understanding of optics, quantum mechanics, spectroscopy, and condensed matter physics. The review copy contained frequent minor grammatical mistakes due to rough translation. Author information is not given. Annotation ©2007 Book News, Inc., Portland, OR (booknews.com)