Regensburg 2025 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 13: Poster

DS 13.14: Poster

Donnerstag, 20. März 2025, 18:00–20:00, P1

A Hybrid Organic-hBN Platform for Quantum Sensing — •Xuan-Kai Zhou, Yan-Tung Kong, Ruo-Ming Peng, and Jörg Wrachtrup — Universität Stuttgart, 3. Physikalisches Institut, Allmandring 13, Stuttgart, Deutschland

Optically activated molecular spin qubits are promising candidates for quantum sensing applications due to their customizable molecular design, enabling biocompatibility and close proximity to target environments. However, organic molecules under ambient conditions often suffer from weak emission signals, instability, and degradation caused by solvent evaporation, air exposure, and low resistance to photobleaching during measurements. In this work, we address these challenges by encapsulating organic molecules within two-dimensional hexagonal boron nitride (2D-hBN) rather than diluting them in conventional host organic polymers such as p-terphenyl. This hybrid organic-2D material heterostructure stabilizes the fluorescence of organic molecules, potentially enhancing the performance of optically detected magnetic resonance (ODMR) measurements. Furthermore, this innovative encapsulation method integrates physical chemistry into 2D materials approaching the monolayer limit, significantly advancing sensing capabilities, including surface-sensitive techniques and biocompatible detection strategies.

Keywords: quantum sensing; hexagonal boron nitride; 2D materials; ODMR; organic solvents