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HL: Fachverband Halbleiterphysik

HL 4: Quantum dots and wires: Optical properties I

HL 4.11: Vortrag

Montag, 12. März 2018, 12:15–12:30, EW 201

Theoretical evaluation of two-photon transitions in wurtzite III-nitride quantum dots — •Stefan Thomas Jagsch, Ludwig Albrecht Thorsten Greif, Stephan Reitzenstein, and Andrei Schliwa — Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstr. 36, D-10623 Berlin

Experiencing both, strong carrier confinement and large exciton binding energies, nitride quantum dots (QDs) are predestined for single-photon emitter-based quantum optics at elevated temperatures. When grown along the (0001) crystallographic axis, wurtzite III-nitride systems exhibit strong internal pyro- and piezoelectric fields of the order of MV/cm. We explore the influence of these internal fields on two-photon transitions in wurtzite III-nitride quantum dots, via the mediation of parity selection rules, in the framework of 8-band k.p-theory [1]. We highlight possible routes to employ III-nitride QDs for frequency conversion on a single-emitter level. [1] Winkelnkemper, M., Schliwa, A. et al. PRB 74 (2006)