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MO: Fachverband Molekülphysik
MO 27: Molecular Spectroscopy II
MO 27.1: Talk
Thursday, March 5, 2026, 14:30–14:45, P 204
Photoswitchable Nanoparticle Arrays — •Heyou Zhang1, Pankaj Dharpure1, Paul Mulvaney2, Mukundan Thelakkat1, and Jürgen Köhler1 — 1University of Bayreuth — 2University of Melbourne
Recent advancements in nanophotonics have significantly enhanced optical data storage and display technologies by enabling dynamic control of light emission. A key challenge in this field is achieving precise manipulation of material emission properties at micro to nano scales on solid-state substrates. To address this challenge, we introduce Surface-Templated Electrophoretic Deposition (STEPD) for fabricating arrays of polymer beads incorporating photo-switchable diarylethene (DAE) molecules. This method allows the creation of well-ordered arrays, enabling selective optical addressing of individual beads to modulate their emission states (on/off) at micrometer scale. Our research explores binary data processing capabilities through selective writing, reading, and erasing operations within specific photonic units. These findings demonstrate the feasibility of continuous recording, opening new possibilities for advanced optical memory devices in optoelectronic systems.
Keywords: Nanoparitcle assembly; Photoswitch; Optical addressing; Optical logic gate