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O: Fachverband Oberflächenphysik

O 66: Poster: Nanostructures at Surfaces

O 66.5: Poster

Mittwoch, 20. März 2024, 18:00–20:00, Poster C

Direct two-photon laser structuring of electrically switchable PEDOT:PSS for nanophotonics — •Pavel Ruchka, Dominik Ludescher, Leander Siegle, Mario Hentschel, and Harald Giessen — 4th Physics Institute and Research Center SCoPE, University of Stuttgart, 70569 Stuttgart, Germany

Switchable conducting polymers, such as PEDOT:PSS, have recently seen a growing interest, as they promise new possibilities for compact integrated devices in augmented/virtual reality applications, nanophotonics, and other fields of optics. Typically, such materials are structured by imposing and etching resist-masks, which can be tedious, costly, and time-consuming. Here, we present a new method to fabricate switchable micro- and nano-structures from PEDOT:PSS using direct laser writing by two-photon lithography. We study the resolution that can be achieved with this technique and demonstrate electrical switching of the optical properties of the obtained structures. As an example, a simple grating with sub-micrometer linewidth is produced and switched, resulting in an electrically switchable nanophotonic beam-steering device, which can be benchmarked to already existing fabrication methods.

Keywords: Conductive polymers; Nanofabrication; Direct laser writing; Two-photon lithography; PEDOT:PSS