Statistical study of stacked/coupled site-controlled pyramidal quantum dots and their excitonic properties

• DOI: 10.1063/1.4985259
• Publication Date: 2017-08-22T13:02:17Z
• Authors: S. T. Moroni; T. H. Chung; G. Juska; A. Gocalinska; E. Pelucchi
• Keywords: Quantum Physics; III-V semiconductors; Condensed Matter - Mesoscale and Nanoscale Physics; Quantum dots; Emission spectra; FOS: Physical sciences; Doppler effect; 01 natural sciences; Red shift; Luminescence spectroscopy; Gallium arsenide; Indium compounds; Statistical analysis; Polarization; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); 0103 physical sciences; Semiconductor quantum dots; Excitons; Quantum Physics (quant-ph); Photoluminescence

We report on stacked multiple quantum dots (QDs) formed inside inverted pyramidal recesses, which allow for the precise positioning of QDs themselves. Specifically, we fabricated double with varying inter-dot distances and ensembles more than two nominally highly symmetric QDs. For each, effect interaction between is studied by characterizing a large number through photoluminescence spectroscopy. A clear red-shift emission energy observed together change in orientation its polarization, suggesting an increasing Finally, show how can help influencing charging excitonic complexes.