Regensburg 2022 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 4: Semiconductor Lasers
HL 4.11: Vortrag
Montag, 5. September 2022, 12:30–12:45, H33
Towards a novel vertical external-cavity surface-emitting laser based on 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
Vertical external-cavity surface-emitting lasers (VECSELs) provide favorable properties compared to other laser systems. The external cavity allows for incorporation of additional optical elements like birefringent filters or absorbers for passive mode-locking which makes it very attractive for various applications. While the possibility of band-gap engineering and a broad gain spectrum are also advantageous, the heat dissipation from the active region due to the thick distributed Bragg reflector (DBR) is a drawback.
A novel approach is a VECSEL based on a grating waveguide structure (GWS) paired with a low-refractive-index heat-spreader below the active region. The absence of a DBR improves the heat removal while the guided-mode resonances from the GWS should provide good coupling of the pump and laser field as well as the high reflectivity necessary for the laser operation. We present the progress towards the realization of an AlGaInP-based GWS-VECSEL for laser emission in the red spectral range.