Regensburg 2019 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 62: Electrical, Dielectrical and Optical Properties of Thin Films
CPP 62.2: Vortrag
Donnerstag, 4. April 2019, 18:00–18:15, H8
Wrinkle Motifs: Gateways toward Flexible Optical Devices — •Anik Kumar Ghosh1, Bernhard Alexander Glatz1, Swagato Sarkar1, Sven Wießner1, Amit Das1, Tobias A. F. König1,2, and Andreas Fery1,2 — 1Leibniz-Institut für Polymerforschung Dresden e. V., Germany — 2Cluster of Excellence Center for Advancing Electronics Dresden (cfaed), Technische Universität Dresden, Germany
Wrinkled patterns are the result of mechanical instability induced by a mechanical mismatch between two layers that is easy to handle, reproducible and very robust. A well-known way to gain such structures represents the oxidation of a pre-strained polydimethylsiloxane (PDMS) slab by plasma treatment [Microchimica Acta, 2009, 165, 249 and Soft Matter, 2015, 11, 3332]. It creates in situ a glassy layer on top, while the consequent strain relaxation of the two-layer system results in a mechanical buckling instability that forms permanent wrinkles. In our setup, we move onward by fabricating blazed grating structures via angle-dependent thin metal film deposition on top of the PDMS wrinkles enabling them for enhanced light-matter interactions. Furthermore, the aforementioned wrinkling technique provides an alternative route towards large area fabrication of grating-waveguide resonant structures. These by the virtue of flexibility can find application in opto-mechanics as well as deformed based resonance sensors following guided mode resonance (GMR).