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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 21: Poster II
CPP 21.15: Poster
Tuesday, March 19, 2024, 18:00–20:00, Poster E
Engineering Anisotropic Photoluminescence in Quantum Dot Metasurfaces — •Lavanya Beri1,2, Olha Aftenieva2, Swagato Sarkar2, and Tobias A.F. König2,3 — 1Indian Institute of Technology Delhi — 2Leibniz-Institut für Polymerforschung Dresden e.V. (IPF), Hohe straße 6, 01069 Dresden, Germany — 3Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, Helmholtzstraße 18, 01069 Dresden, Germany
Quantum dots are high-performance, solution-processed materials with high photoluminescence quantum yield. Due to these exceptional properties, quantum dots can serve as building blocks for metasurfaces and are of broad interest for photonic applications. Here, we propose a metasurface with anisotropic photoluminescence due to its structuring. With the help of the template-assisted self-assembly methods [Advanced Functional Materials, 31(36), 2105054], we arrange highly luminescent quantum dots into the so-called blazed grating with intrinsic geometrical asymmetry. The latter modifies quantum dots' otherwise omnidirectional emission profile [ACS nano, 17(3), 2399-2410], enhancing it along the particular resonant directions. We demonstrate the asymmetry of the periodic structure using angle-resolved Fourier spectroscopy. This approach may pave the way toward unidirectional light propagation and lasing [Advanced Optical Materials, 11(6), 2202226].
Keywords: Quantum Dots; Soft Lithography; Self-Assembly; Angle-resolved Fourier spectroscopy; Lasing