Polar optical phonon states and dispersive spectra of wurtzite ZnO nanocrystals embedded in zinc-blende MgO matrix

Linear and nonlinear optical absorption of excitonic states in a wurtzite ZnO nanowire: Quantum size effect

“…This is mainly due to the following evident facts. ZnO semiconductor has a series of unique features and advantages [1][2][3][4]: wide direct bandgap (∼3.3 eV at 300 K) and a large exciton binding energy (∼60 meV) which make the material quite attractive as a basis for the creation of short-wavelength optoelectronic devices such as light-emitting and laser diodes operating in green-ultraviolet range as well as high-power and high-temperature electronics; piezoelectric and pyroelectric properties which result in ZnO being an ideal candidate for fabricating electromechanical coupling devices; biodegradable and possibly biocompatible characteristics that is suitable for medical and biological applications; easy fabrication of various nanostructures via a chemical approach or physical method, which leads to potentially lower costs for ZnO-based devices and equipment. Hence the investigation of physical properties in ZnO quantum structures has become a hot topic during the last decade [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”