Choi, HeejinKim, SeonyeongScherrer, MarkusMoselund, Kirsten E.Lee, Chang-Won2024-02-202024-02-202024-02-202023-12-0110.3390/nano13243152https://infoscience.epfl.ch/handle/20.500.14299/204836WOS:001131036100001Topological nature in different areas of physics and electronics has often been characterized and controlled through topological invariants depending on the global properties of the material. The validity of bulk-edge correspondence and symmetry-related topological invariants has been extended to non-Hermitian systems. Correspondingly, the value of geometric phases, such as the Pancharatnam-Berry or Zak phases, under the adiabatic quantum deformation process in the presence of non-Hermitian conditions, are now of significant interest. Here, we explicitly calculate the Zak phases of one-dimensional topological nanobeams that sustain guided-mode resonances, which lead to energy leakage to a continuum state. The retrieved Zak phases show as zero for trivial and as pi for nontrivial photonic crystals, respectively, which ensures bulk-edge correspondence is still valid for certain non-Hermitian conditions.Physical SciencesTechnologyTopological InvariantsZak PhasesNon-HermitianGuided-Mode ResonancePhotonic Crystaltext::journal::journal article::research article