DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2015 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

HL: Fachverband Halbleiterphysik

HL 21: Poster IB (Oxide semiconductors; II-VI and group IV semiconductors; Nanotubes and Buckyballs)

HL 21.11: Poster

Monday, March 16, 2015, 15:00–20:00, Poster B

Stark-Effect Measurements on Giant Rydberg Excitons in Cuprous Oxide — •Johannes Thewes1, Julian Heckötter1, Marc Assmann1, Tomasz Kazimierczuk2, Dietmar Fröhlich1, and Manfred Bayer11Institut für Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany — 2Faculty of Physics, University of Warsaw, Poland

We report on Stark-effect measurements of Giant Rydberg excitons3 in Cu2O with quantum numbers up to n = 25. These excitons have extensions up to 2 µm. As known from hydrogen, the dipole matrix elements for Δ n = 0 and Δ l = ± 1 grow quadratically with n. In Cu2O, P-excitons are dipole-allowed. Due to the electric field-induced coupling of P-excitons to S- and D-excitons we observe P/S and P/D resonances in fields as low as 10  Vcm−1. Measurements are done on a 30 µm sample with a single frequency dye laser (Δ E = 1 neV) at temperatures down to 1.2 K. Contrary to hydrogen, the Stark-effect measurements can be done in a longitudinal configuration (Klaser || E). — 3 T. Kazimierczuk et al. Nature 514, 343 (2014)

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2015 > Berlin