Nanoscale Temperature Measurement Under Optical Illumination Using AlGaN:Er3+ Photoluminescence Nanothermometry
In this chapter, we present working principle and experimental details of AlGaN:Er3+ nanothermometry technique based on Er3+ emission that offers nanoscale temperature measurement and thermal imaging of nanoparticles/nanostructures under optical illumination. A thin film of Al0.94Ga0.06N with embedded Er3+ ions is used as a thermal sensor for nanoscale temperature measurement and thermal imaging of optically excited gold nanostructures under far-field illumination. This thermal sensor film is based on relative photoluminescence intensities of energy transitions from thermally coupled 2H11/2 and the 4S3/2 energy levels to the 4I15/2 energy level of the Er3+ ions. The temperature profile around an optically excited nanostructure can be generated under imaging mode, and a dynamic measurement of temperature can also be performed using this thermal sensor film.
- 11.Baral S (2017) Fundamental Studies of Photothermal Properties of a Nanosystem and the Surrounding Medium Using Er3+ Photoluminescence Nanothermometry. (Electronic Thesis or Dissertation). Retrieved from https://etd.ohiolink.edu/