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HL: Fachverband Halbleiterphysik

HL 52: Optical properties & Photonic crystals

HL 52.10: Vortrag

Freitag, 16. März 2018, 12:00–12:15, EW 201

Trapping potentials for Rydberg excitons in cuprous oxide (Cu₂O) — •Sjard Ole Krüger and Stefan Scheel — Institut für Physik, Universität Ro- stock, D-18059 Rostock, Germany

The trapping of neutral atoms by optical dipole potentials is an established experimental technique. For semiconductor excitons, similar traps can be created by a spatially inhomogeneous strain field and have been applied in the pursuit of BEC of the excitonic ground state in Cu₂O. These strain traps offer a great variety achievable geometries, depending on the stressor, its orientation relative to the crystal axes, the stress and the excitonic state in question. In this talk, calculations of a strain-induced waveguide potential [1] for the Rydberg excitons of the yellow series in Cu₂O [2] will be presented and conditions for the formation of such traps will be evaluated. Additionally, the possibility of using optical dipole potentials to trap excitons will be discussed.

[1] S. O. Krüger and S. Scheel, http://arxiv.org/abs/1711.06639

[2] T. Kazimierczuk et al. , Nature 514, 343 (2014)