title: Controlling the Spontaneous Emission Rate of Quantum Wells in Rolled-Up Hyperbolic Metamaterials.
abstract: We experimentally demonstrate the enhancement of the spontaneous emission rate of GaAs quantum wells embedded in rolled-up metamaterials. We fabricate microtubes whose walls consist of alternating Ag and (In)(Al)GaAs layers with incorporated active GaAs quantum-well structures. By variation of the layer thickness ratio of the Ag and (In)(Al)GaAs layers we control the effective permittivity tensor of the metamaterial according to an effective medium approach. Thereby, we can design samples with elliptic or hyperbolic dispersion. Time-resolved low temperature photoluminescence spectroscopy supported by finite-difference time-domain simulations reveal a decrease of the quantum well's spontaneous emission lifetime in our metamaterials as a signature of the crossover from elliptic to hyperbolic dispersion.
authors: Institut für Nanostruktur und Festkörperphysik, Universität Hamburg, Jungiusstr. 11, D-20355 Hamburg, Germany.|Institut für Optische und Elektronische Materialien, Technische Universität Hamburg-Harburg, D-21073 Hamburg, Germany.
authors: K Marvin
authors: KM
authors: Schulz
authors: Institut für Nanostruktur und Festkörperphysik, Universität Hamburg, Jungiusstr. 11, D-20355 Hamburg, Germany.|Institut für Physikalische Chemie, Universität Hamburg, Grindelallee 117, D-20146 Hamburg, Germany.
authors: Hoan
authors: H
authors: Vu
authors: Institut für Nanostruktur und Festkörperphysik, Universität Hamburg, Jungiusstr. 11, D-20355 Hamburg, Germany.
authors: Stephan
authors: S
authors: Schwaiger
authors: Institut für Nanostruktur und Festkörperphysik, Universität Hamburg, Jungiusstr. 11, D-20355 Hamburg, Germany.
authors: Andreas
authors: A
authors: Rottler
authors: Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg, Germany.
authors: Tobias
authors: T
authors: Korn
authors: Institut für Nanostruktur und Festkörperphysik, Universität Hamburg, Jungiusstr. 11, D-20355 Hamburg, Germany.
authors: David
authors: D
authors: Sonnenberg
authors: Institut für Physikalische Chemie, Universität Hamburg, Grindelallee 117, D-20146 Hamburg, Germany.
authors: Tobias
authors: T
authors: Kipp
authors: Institut für Nanostruktur und Festkörperphysik, Universität Hamburg, Jungiusstr. 11, D-20355 Hamburg, Germany.
authors: Stefan
authors: S
authors: Mendach