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Three-dimensional nanothermometry below the diffraction limit.

J Thiem, S Spelthann, J Neumann

|July 15, 2021

Summary

This summary is machine-generated.

Lanthanide-doped nanothermometers offer sensitive temperature measurements. This study numerically optimized their spatial resolution using stimulated emission depletion microscopy, achieving sub-diffraction limit contactless temperature sensing.

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Area of Science:

Nanotechnology
Optical microscopy
Materials science

Background:

Lanthanide-doped nanothermometers provide sensitive temperature measurements (few %/K).
Their spatial resolution, crucial for applications, remains understudied and unoptimized.

Purpose of the Study:

To numerically investigate and enhance the spatial resolution of nanothermometers.
To establish relationships between spatial and temperature resolution using advanced microscopy techniques.

Main Methods:

Numerical simulations of nanothermometers.
Application of stimulated emission depletion (STED) microscopy principles.
Systematic variation of excitation and depletion beam parameters.

Main Results:

Identified fundamental relationships between spatial and temperature resolution.
Predicted contactless temperature measurement below the diffraction limit.
Achieved a temperature resolution of ±1.25 K.
Analyzed the impact of sample thickness and position on resolution.

Conclusions:

STED microscopy significantly improves nanothermometer spatial resolution.
Sub-diffraction limit contactless thermometry is feasible.
Potential for three-dimensional temperature mapping demonstrated.