From Event: SPIE Organic Photonics + Electronics, 2016
Two of the most successful microresonator concepts are the vertical cavity surface emitting laser (VCSEL), comprising a vertical cavity of highly reflective DBRs sandwiching an active layer, and the distributed feedback (DFB) laser, where a periodic optical grating selects laser modes from an active waveguide (WG) layer. Here, an organic microcavity is coupled with in-plane periodic photonic wires or dots to facilitate a coherent interaction between waveguided and vertically emitting modes as well as creating an additional in-plane confinement. The vertical positioning of such patterning plays a crucial role in the observable features. While embedding metallic or dielectric wires directly in the cavity layer leads to a strong lateral confinement as well as the observation of photonic Bloch states [1,2], the deposition of the full VCSEL stack on top of a periodic grating reveals novel features. In such a device, we demonstrate the coherent coupling between parabolic VCSEL and linear WG modes in the angle-resolved far field emission. In this system, lasing occurs not only at the VCSEL parabola apex but also at points of hybridization, when the dispersion of modes cross, showing a drastically enhanced in-plane coherence . The coherent coupling of two conceptually different devices with perpendicular propagation directions paired with the macroscopic coherence facilitate a multitude of new applications.
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 Adv. Opt. Mater. under review (2016).
Andreas Mischok, Tim Wagner, Robert Brückner, Markas Sudzius, Hartmut Fröb, Vadim G. Lyssenko, and Karl Leo, "Lasing and macroscopic coherence of periodic 2D and 3D microstructures in organic microcavities
(Conference Presentation)," Proc. SPIE 9941, Organic Light Emitting Materials and Devices XX, 99411H (Presented at SPIE Organic Photonics + Electronics: August 30, 2016; Published: 4 November 2016); https://doi.org/10.1117/12.2236308.5167078095001.
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