Synergy between NIR luminescence and thermal emission toward highly sensitive NIR operating emissive thermometry

Abstract

There are many figures of merit, which determine suitability of luminescent thermometers for practical applications. These include thermal sensitivity, thermal accuracy as well as ease and cost effectivness of technical implementation. A novel contactless emission thermometer is proposed, which takes advantage of the coexistence of photoluminescence from Nd3+ doping ions and black body emission in transparent Nd3+ doped-oxyfluorotellurite glass host matrix. The opposite temperature dependent emission from these two phenomena, enables to achieve exceptionally high relative sensitivity SR = 8.2%/°C at 220 °C. This enables to develop new type of emissive noncontact temperature sensors.

SOI Waveguide Bragg Grating Photonic Sensor for Human Body Temperature Measurement Based on Photonic Integrated Interrogator

“…Infrared radiation thermometers can achieve non-contact measurement and play a key role in dealing with large-scale infectious diseases. In addition, highly sensitive NIR operating emissive thermometry can be achieved through the synergy between NIR luminescence and thermal emission [ 2 ]. However, infrared radiation thermometers have some shortcomings in accuracy and reliability, with the majority of the differences between −2 and +1 °C [ 3 ].…”

Multiple ratiometric nanothermometry using semiconductor BiFeO3 nanowires and quantitative validation of thermal sensitivity

“…Therefore, temperature measurements based on changes in the optical properties of materials can overcome these challenges as they offer non-contact measurements. Among all optical methods, temperature dependencies of the luminescent properties of materials have attracted the most attention due to the sensitivity of luminescence and the ease with which luminescence can be detected in comparison to other optical methods [6][7][8][9]. The changes of luminescence properties of nanomaterials with temperature such as changes of absolute and relative emission intensities, lifetime of excited states, emission rise times, peak positions, and emission bandwidths allow them to act as sensitive thermometers.…”