Optical and Spin Characterization of Color Centers in 2D Hexagonal Boron Nitride for Quantum Sensor

Abstract

Since the birth of quantum mechanics, physics and its applications have encountered a new paradigm. Among these is quantum metrology. Quantum sensing holds the potential to surpass the limitations of classical sensing and reach the quantum limit. To realize such quantum sensing, it is essential to have a material platform with appropriate quantum properties. This thesis discusses the boron vacancy point defects in 2D hexagonal boron nitride, a new platform that can be utilized for quantum sensing using spin systems. I investigated the advantages and improvements of this platform compared to the widely used diamond NV center through optical characterization and spin characterization. Additionally, I demonstrated the sensing of magnetic fields and temperature using the hBN platform. Following that, I will discuss the measurement results and propose future directions for further research. In conclusion, due to the unique material properties of 2D hBN and its distinct differences from diamond, it is expected to gain attention as a new platform for quantum sensors.