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Detection of airborne pollen using light polarization and spectroscopy

Réf ABG-125021	Sujet de Thèse
17/07/2024		Financement public/privé

Institut Lumière Matière

Lieu de travail

Villeurbanne - Auvergne-Rhône-Alpes - France

Intitulé du sujet

Detection of airborne pollen using light polarization and spectroscopy

Champs scientifiques

Physique
Sciences de l’ingénieur
Terre, univers, espace

Mots clés

spectroscopy, polarimetry, complex particles, dilute media, backscattering.

Description du sujet

Scientific context :As part of the ecological transition, climate shifts and human-induced changes stress global vegetation. Pollen is a key component in ecosystem maintenance. Monitoring it is then essential for analysing climate impact, biodiversity preservation, ecosystem health, sustainable agriculture, allergy diagnosis, and early warnings. Developing accurate airborne pollen monitoring sensors, assessing pollen diversity, abundance and vertical distribution, is then crucial.

Mission :In this context, the goal of this PhD is to contribute to this work by developing a cutting-edge pollen remote sensing instrument, identifying pollen types as a function of altitude, in real-time, without the need for sampling, under atmospheric conditions. This biosensor also evaluates pollen levels, displayed in a color-coded format, akin to atmospheric pollution, for warning diagnosis. The PhD will be based on lidar field observations and a laboratory database of pollen optical fingerprints. The sensor will be validated on a rural site, compared with standard pollen counters at various heights above ground.

Outlooks :Outlooks of this PhD are numerous, both from a fundamental (how light propagates on complex-shaped pollen) and an applicative point of view (how pollen vertical dispersion impacts allergies).

Bibliography :
Lake, I. R. et al., Climate Change and Future Pollen Allergy in Europe. Environmental Health Perspectives 125: 385–391, https://pubmed.ncbi.nlm.nih.gov/27557093/, (2017).
Cholleton, D., et al., Laboratory evaluation of the scattering matrix of ragweed, ash, birch and pine pollens towards pollen classification, Atmos. Meas. Tech., 15, 1021-1032, 10.5194/amt-15-1021-2022, (2022).

Prise de fonction :

01/10/2024

Nature du financement

Financement public/privé

Précisions sur le financement

ANR

Présentation établissement et labo d'accueil

Institut Lumière Matière

The Institute for Light and Matter (Institut Lumière Matière - iLM) is a joint CNRS-University of Lyon 1 research unit located on the Lyon Tech La Doua campus.

With more than 300 employees, including a hundred doctoral students and post-docs, the iLM is a major player in physics and chemistry research in the Auvergne Rhône Alpes region, internationally recognized for the excellence of its research.

The continuum between fundamental research, responses to major societal challenges and innovation is at the heart of the unit's approach. The entire staff is committed to promoting excellence and ethical and responsible research.

Site web :

https://ilm.univ-lyon1.fr/index.php?option=com_content&view=article&id=64

Intitulé du doctorat

Doctorat de Physique

Pays d'obtention du doctorat

France

Etablissement délivrant le doctorat

Université Claude Bernard Lyon 1

Ecole doctorale

Physique et astrophysique de Lyon (PHAST)

Profil du candidat

The candidate should have skills in optics, polarization or/and spectroscopy, laser physics. Skills in atmospheric physics will also be appareciated but are not mandatory.

Date limite de candidature

17/09/2024

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