Cross-correlated quantum thermometry using diamond containing dual-defect centers

• Main Authors: Gupta, Madhav, Zhang, Tongtong, Yeung, Lambert, Zhang, Jiahua, Tan, Yayin, Yiu, Yau Chuen, Zhang, Shuxiang, Wang, Qi, Wang, Zhongqiang, Chu, Zhiqin
• Format: Journal Article
• Language: English
• Published: 28.02.2023
• Subjects: Physics - Optics; Physics - Quantum Physics
• DOI: 10.48550/arxiv.2303.00073

The contactless temperature measurement at micro/nanoscale is vital to a broad range of fields in modern science and technology. The nitrogen vacancy (NV) center, a kind of diamond defect with unique spin-dependent photoluminescence, has been recognized as one of the most promising nanothermometers. However, this quantum thermometry technique has been prone to a number of possible perturbations, which will unavoidably degrade its actual temperature sensitivity. Here, for the first time, we have developed a cross-validated optical thermometry method using a bulk diamond sample containing both NV centers and silicon vacancy (SiV) centers. Particularly, the latter allowing all-optical method has been intrinsically immune to those influencing perturbations for the NV-based quantum thermometry, hence serving as a real-time cross validation system. As a proof-of-concept demonstration, we have shown a trustworthy temperature measurement under the influence of varying magnetic fields. This multi-modality approach allows a synchronized cross-validation of the measured temperature, which is required for micro/nanoscale quantum thermometry in complicated environments such as a living cell.