Optically Detected Cyclotron Resonance in AgBr

Abstract

Optically detected magnetic resonance (ODMR) studies reveal cyclotron resonance of electrons and holes in AgBr as well as a number of paramagnetic resonances already observed by other workers. Cyclotron resonance signals are observed in the recombination radiation from excitons bound t o iodine isoelectronic impurities. Asymmetry of the electron-cyclotron resonance gives a measure of the nonparabolicity of the conduction band which results in an energy dependent effective mass. The enhanced trapping of electrons on iodine centres by interaction with LO phonons is discussed. Mit optisch

Effects of microwave fields on recombination processes in 4H and 6H SiC

“…In the former case, the PL intensity is affected by MW-heated carriers as a result of impact ionization 4-7 or a change in carrier capture to defects. 7,8 Which of these effects dominates depends strongly on the properties of the materials and experimental conditions. In Si, Ge, and some III-V compound semiconductors, impact ionization of excitons and shallow impurities is shown to be the dominant mechanism, 4-7 while lattice heating at the CR has been found to play an important role in some ternary semiconductors.…”