Temperature is one of the fundamental physical state variables through
out most scientific and technological applications. However, measuring
temperature is not always as straight forward as it may seem,
especially if a high degree of precision is required. There
are many different optical temperature sensor concepts, ranging from
fiber based sensors to thermal radiation cameras. Among those, this
thesis focuses on the temperature measurement with optically active
nanocrystals. The first part of this thesis provides the
underlying theoretical principles and physical correlations. After that,
different optimization routes for both thermal and spatial resolution,
respectively, are presented in the separate chapters. Lastly, a numerical concept
to optimize the spatial resolution of measurements by utilizing stimulated
emission depletion is presented. Future developments that lie ahead in nanothermometry are discussed in the concluding section.
|