Optical Thermometry with Quantum Emitters in Hexagonal Boron Nitride
Yongliang Chen, Thinh N. Tran, Thinh N. Tran, Ngoc My Hanh Duong, Chi Li, Milos Toth, Carlo Bradac, Igor Aharonovich, Alexander S. Solntsev, Toan Trong Tran, Toan Trong Tran
Abstract
Nanoscale optical thermometry is a promising noncontact route for measuring local temperature with both high sensitivity and spatial resolution. In this work, we present a deterministic optical thermometry technique based on quantum emitters in nanoscale hexagonal boron nitride. We show that these nanothermometers show better performance than homologous, all-optical nanothermometers in both sensitivity and the range of working temperature. We demonstrate their effectiveness as nanothermometers by monitoring the local temperature at specific locations in a variety of custom-built microcircuits. This work opens new avenues for nanoscale temperature measurements and heat flow studies in miniaturized, integrated devices.