Dresden 2026 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 79: Plasmonics and nanooptics: Light-matter interaction, spectroscopy III
O 79.3: Vortrag
Donnerstag, 12. März 2026, 11:00–11:15, HSZ/0403
Symmetry Guidelines of Vacuum Cavity Material Engineering — •Jingkai Quan1, Chongxiao Fan1, Benshu Fan1, I-Te Lu1, and Angel Rubio1,2 — 1Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, 22761, Hamburg, Germany — 2Center for Computational Quantum Physics, Flatiron Institute, Simons Foundation, New York City, New York, 10010, USA
Cavity material engineering, which manipulates material properties by exploiting vacuum-fluctuating photon modes in dark cavities, is a rapidly advancing field. Despite significant progress, most studies focus on isolated combinations of materials and cavity modes. In this study, based on a comprehensive group theory analysis, we develop a general framework for cavity material engineering with linearly polarized vacuum photon modes. We analyze the symmetry of the effective photon-free Hamiltonian inside dark cavities and establish a complete symmetry-breaking characterization induced by cavity photon modes across all 32 crystalline point groups. Building on this analysis, we predict phenomena such as the degeneracy lifting and emergence of new infrared and Raman spectral features induced by cavity modes. More intriguingly, we reveal a previously overlooked effect: cavity-induced polarization in non-polar crystals, and derive the corresponding tensor forms. These predictions are validated through advanced quantum-electrodynamical density-functional theory (QEDFT) calculations. Our work uncovers the fundamental symmetry principles governing light-matter interactions in the dark cavity and provides a systematic roadmap for future researches in cavity material engineering.
Keywords: Group Theory; Cavity Material Engineering; Light-Matter Interaction; Quantum-electrodynamical Density-functional Theory; Symmetry Analysis