Intrinsic Linear Optical Properties Close to the Fundamental Absorption Edge

摘要: In this chapter, we review the intrinsic linear optical properties of ZnO close to fundamental absorption edge. This comprises band-to-band transitions and free excitons polaritons in bulk samples epitaxial layers; localized quantum wells wires, including nanorods; also alloys dots (or nano crystals) finally cavity polaritons. By term “free excitons”, mean quanta electronic excitation semiconductors (and insulators), which can move freely through sample are described by a plane wave factor exp(i Kr) d dimensions (d = 3, 2 or 1), where K is vector centre mass motion r, multiplied envelope function relative (hydrogen-like) electron hole around their common gravity. terms “bound exciton complexes” excitons” [(BEC) (BE), respectively], understand that bound some centres like neutral ionized donors acceptors but more complex centres. They will be treated Chap. 7. contrast, “localized electron–hole pairs, disorder alloy disorder, for example, Mg1−xZn x O and/or fluctuations well wire) width structures. These phenomena inherent structures reduced dimensionality therefore included chapter. The influence external fields on both then covered 8.