Berlin 2024 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 37: Poster IV
HL 37.21: Poster
Mittwoch, 20. März 2024, 18:00–20:30, Poster F
Towards novel red-emitting VECSELs with a grating waveguide structure — •Peter Gierss1, Ana Ćutuk1, Maxim Leyzner2, Uwe Brauch2, Marwan Abdou Ahmed2, Michael Jetter1, Thomas Graf2, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen, Center for Integrated Quantum Science and Technology (IQST) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart — 2Institut für Strahlwerkzeuge, University of Stuttgart, Pfaffenwaldring 43, 70569 Stuttgart
Classical vertical external-cavity surface-emitting lasers (VECSELs) offer favorable properties in comparison to other laser systems like e.g. near-diffraction limited beam profiles, high possible output powers and due to their external cavity, the possibility to integrate further optical elements into the cavity. Limitations arise due to the incorporation of a thick distributed Bragg reflector (DBR), which restricts the available laser wavelength and also possesses poor thermal properties.
A new design for a VECSEL is based on the use of a grating-waveguide structure (GWS) over the active region. In combination with a low-refractive-index heat spreader, the leaky guided-mode resonances of the GWS lead to a broadband high reflectivity of the device, which is required for efficient laser operation.
In this contribution we present our recent progress in the development and fabrication of this device.
Keywords: vertical external-cavity surface-emitting laser; grating waveguide structure; semiconductor disk lasers