Controlling quantum dot emission by integration of semiconductor nanomembranes onto piezoelectric actuators

• DOI: 10.1002/pssb.201100775
• Publication Date: 2012-02-21T11:11:25Z
• Authors: A. Rastelli; F. Ding; J. D. Plumhof; S. Kumar; R. Trotta; Ch. Deneke; A. Malachias; P. Atkinson; E. Zallo; T. Zander; A. Herklotz; R. Singh; V. Křápek; J. R. Schröter; S. Kiravittaya; M. Benyoucef; R. Hafenbrak; K. D. Jöns; D. J. Thurmer; D. Grimm; G. Bester; K. Dörr; P. Michler; O. G. Schmidt
• Keywords: 0103 physical sciences; 01 natural sciences; Excitons; Piezoelectric actuators; Quantum dots; Strained semiconductors; Electronic, Optical and Magnetic Materials; Condensed Matter Physics

Abstract This paper reviews the recent advances obtained by integrating semiconductor epitaxial films with embedded self‐assembled quantum dots (QDs) on top of single‐crystal piezoelectric substrates made lead magnesium niobate–lead titanate (PMN‐PT). combination allows us to study in detail effects produced variable strains (up about ± 0.2%) excitonic emission single QDs and add a powerful “tuning knob” QDs. Biaxial stress can be used reversibly shift wavelength spectral range wider than 10 meV modify relative binding energies species. Anisotropic has instead strong influence fine structure splitting neutral excitons. Finally, we present experimental results effect biaxial strain optical modes microring resonators show simple approach enabling compensation piezo‐creep via closed‐loop system. magnified image Schematic illustration QD membrane integrated PMN‐PT substrate. Stress provided substrate broad tuning properties overlying dots.