Berlin 2024 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 12: Semiconductor Lasers I

HL 12.2: Talk

Monday, March 18, 2024, 15:15–15:30, EW 561

Tuning nanowire lasers via hybridization with tailored dye molecules — •Edwin Eobaldt, Leon Kroß, Jakob Wurschi, Aurelia Eberhard, Marco Grünewald, Daniel Costabel, Kalina Peneva, and Carsten Ronning — Friedrich-Schiller-Universität, Jena, Deutschland

Among the myriad nanomaterials, semiconductor nanowires have garnered considerable scientific attention as promising candidates for realizing nano-scaled coherent light sources and all-optical circuits. This interest stems from their notable waveguiding properties and intrinsic ability to lase under high excitation. Nevertheless, achieving a precise control over their lasing properties, such as emission wavelength and lasing threshold, is crucial for a diverse range of applications. In this context, the hybridization of nanowires with tailored molecules emerges as a potential avenue, offering new control mechanisms through efficient charge and energy transfer processes at the heterointerface. To illustrate this concept, we chose to hybridize ZnO nanowires with perylene-based dye molecules, leveraging their exceptional chemical and optical stability. Notably, these molecules provide the advantage of easily tuning their optical gap across a broad spectral range through chemical functionalization. This study employs comparative micro-photoluminescence measurements to explore the impact of these molecules on the nanowire lasing properties. Specifically, we demonstrate how different chemical functionalizations and varying amounts of dyes enable nanowire wavelength tuning.

Keywords: Nanowire; Perylene; Dye; Laser; Tuning