PHOTOLUMINESCENCE SIGNATURES OF NEGATIVELY CHARGED MAGNETOEXCITONS

The negatively charged quasi-two-dimensional exciton (X-) is studied n umerically in the presence of a uniform perpendicular B field and vari ous in-plant confinements, The corresponding photoluminescence (PL) sp ectra, including shakeup processes, are calculated. These calculations provide a quantitative explanation of recent experimental PL spectra. The photoluminescence signatures of charged excitons in quantum dots are also examined. Electron-hole pair distribution functions are calcu lated that show the structure of the charged exciton states (both grou nd and excited stairs). Increasing excitation reflects a competition b etween two effects: partial ionization of either one or two electrons.