Regensburg 2016 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 53: Poster II
HL 53.28: Poster
Mittwoch, 9. März 2016, 09:30–13:30, Poster A
Micro-Photoluminescence Spectroscopy and CCD-Imaging of Optically Coupled Microdisk Dimer-Structures — •Simon Seyfferle1, Fabian Hargart1, Matthias Paul1, Michael Jetter1, Tsung-Li Liu2, Evelyn Hu2, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen, Universität Stuttgart, Allmandring 3, 70569 Stuttgart — 2School of Engineering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138
The coupling of optical microcavities forming photonic molecules allows for interesting cQED devices, e.g. low threshold lasers and single-photon sources. Providing high Q-factors and small mode volumes microdisk structures put themselves forward for the investigation of optically coupled photonic molecules.
We investigate two adjacent GaInP-based microdisks coupled via the evanescent field of their whispering-gallery modes. Each 5 µm diameter disk houses an active layer of InP semiconductor quantum dots. Additionally to the already successfully established temperature tuning approach by local laser heating that brings uncoupled modes into resonance, we search for disk pairs displaying already coupled modes by means of µ -PL spectroscopy scans applying a 4f-setup.
Furthermore, we undertake efforts in real space CCD-imaging of the dimer structures mode profile to obtain additional evidence of optically coupled disk pairs.