Time-Resolved Luminescence Nanothermometry with Nitrogen-Vacancy Centers in Nanodiamonds

Area of Science:

• Nanotechnology
• Quantum Sensing
• Materials Science

Background:

• Accurate temperature measurement at the nanoscale is crucial for various scientific and technological fields.
• Nitrogen-vacancy (NV(-)) centers in diamond are established as sensitive nanoscale temperature probes.
• Previous NV(-) thermometry was limited to steady-state conditions.

Purpose of the Study:

• To develop a time-resolved method for nanoscale temperature sensing.
• To enable real-time monitoring of temperature changes and study nanoscale heat transfer.
• To extend the application of NV(-) nanothermometry to dynamic processes.

Main Methods:

• A three-point sampling method for real-time temperature monitoring (±100 K range).
• A pump-probe experiment for studying nanoscale heat transfer with <10 μs temporal resolution.
• Utilized 100 nm fluorescent nanodiamonds and finite-element numerical simulations for validation.

Main Results:

• Demonstrated real-time temperature monitoring capabilities.
• Achieved high temporal resolution for nanoscale heat transfer studies.
• Validated experimental measurements with numerical simulations.

Conclusions:

• The developed time-resolved luminescence nanothermometry is effective for dynamic nanoscale temperature measurements.
• This technique offers significant potential for applications in laser material processing and operational nanodevices.
• Combines experimental and theoretical approaches for robust nanoscale thermal analysis.