CE42 - Capteurs, instrumentation

TeraHertz time domain spectrometer for the determination of optical properties of suspended micro and nanoparticles in the air in a controlled environment – STEPSON

Submission summary

The study of climate change, in order to react best, requires a detailed knowledge of the physicochemical properties of the atmosphere. In particular, the calculation of the radiative balance which requires the knowledge of the transmission and the reflection of the atmosphere in the solar spectral band (direct forcing) and the spectral range IR of thermal emission of the earth (indirect forcing). Current methods require precise knowledge of the real and imaginary parts of aerosol refractive indices. However, these complex refractive index (CRI) are poorly known in the lower frequency bands and in particular in the TeraHertz (100 GHz-30THz). It is therefore essential to propose experiments to measure them. STEPSON will measure CRI of suspended particles based on their size in a controlled environment. Transportable, it will be able to participate in measurement campaigns coupled with other spectral techniques.

Project coordination

Sophie Barois née ELIET (Institut d'électronique, de microélectronique et de nanotechnologie)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.


IEMN Institut d'électronique, de microélectronique et de nanotechnologie

Help of the ANR 280,427 euros
Beginning and duration of the scientific project: February 2021 - 42 Months

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