Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 40: Poster – Photonics

Q 40.3: Poster

Wednesday, March 4, 2026, 17:00–19:00, Philo 1. OG

Passive photonic structures in transition metal dichalcogenides for integrated quantum photonics — •Anita Kohlwes¹, Zengya Li², Timur Shegai², and Doris Reiter¹ — ¹TU Dortmund, Germany — ²Chalmers University of Technology, Gothenburg Sweden

Integrated photonics relies on nanostructured materials, including single-photon emitters, waveguides, and photonic cavities. While most existing approaches use different materials for the various components, we aim to realize a single-material, all-in-one photonic platform based on transition-metal dichalcogenides (TMDCs). With this goal in mind, we simulate passive photonic TMDC structures using Maxwell solvers such as FDTD or FEM and optimize their performance. The first part of the study examines simple rectangular waveguides and how geometry affects mode confinement, effective index, and propagation. From this, we derive clear design rules toward experiments that maximize performance while remaining compatible with planar processing. In the second part, we introduce a periodic array of holes in the waveguide to create a photonic bandgap. By tuning the period and hole diameter, we design efficient mirrors and a stopband at the target wavelength for TMDC single-photon emitters. Our results represent a first step towards a single-material TMDC photonic platform.

Keywords: TMDC; waveguide; photonic crystal