Regensburg 2016 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 24: Plasmonics and Nanooptics: Fabrication, Characterization and Applications

O 24.3: Poster

Montag, 7. März 2016, 18:15–20:30, Poster E

Coupling of quantum well emission to surface plasmon modes in rolled-up microtubes — •Jan Siebels, Hoan Vu, Tobias Kipp, and Alf Mews — Institut für Physikalische Chemie, Universität Hamburg, Grindelallee 117, 20146 Hamburg, Germany

It has recently been shown that dielectric grating structures with gradually varying effective refractive indices in the direction perpendicular to the periodicity can be utilized for the excitation of surface plasmons in a wide spectral range [1]. This general idea of broad band surface plasmon excitation can be transferred to simple metallic gratings with gradually varying filling-factors. Here, we present the fabrication and optical characterization of silver grating structures positioned in rolled-up microtubes with embedded quantum well heterostructures. Spectrally- and time-resolved photoluminescence spectroscopy shows spectral shifts and changes of the decay lifetime exclusively in those areas of these structures in which calculations indicate an overlap between surface plasmon dispersion and emission energy of the quantum well. Based on these observations we propose and discuss possible coupling mechanisms.

[1] J. Ehlermann et al., Appl. Phys. Lett. 106, 101106 (2015).