Dresden 2026 – scientific programme
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O: Fachverband Oberflächenphysik
O 22: Surface dynamics – Poster
O 22.2: Poster
Monday, March 9, 2026, 18:00–20:00, P2
Photonic Structures for Purcell-Enhanced Driving of a Structural Phase Transition — •Nandana Veena Uday1, Florian Spickmann1,2, Sebastian Zafra Koch1,2, Felix Kurtz1, Claus Ropers1,2, and Hannes Böckmann1 — 1Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany — 2University of Göttingen, 4th Physical Institute, Göttingen, Germany
Direct integration of silicon photonics with low-dimensional materials connects tailored light-matter interaction with surface-sensitive probing. Here, we explore the remote optical driving of a prototypical Peierls insulator, adsorbed on the surface of a silicon photonic waveguide. Optical gratings couple infrared light to guided modes of a silicon slab, while ultrafast low-energy electron diffraction probes the waveguide-mediated optical quench of the periodic lattice distortion in adsorbed atomic indium chains. These experiments constitute first steps towards engineering photonic environments for surface phase control using tailored lithographic fabrication techniques. Potential avenues range from Purcell-enhanced photoinduced phase transitions to driven states of matter obtained by interfacing surface structures with integrated micro-resonator cavities. [1] Böckmann, Hannes, et al. Structural Dynamics 9.4 (2022)
Keywords: Low-dimensional materials; Photonic waveguide; Surface structural dynamics; Ultrafast electron diffraction; Charge Density Waves