Missions

The group has just set up a new platform to perform ultra-broadband spectroscopy and microscopy experiments on materials and devices. This platform covers energies ranging from 5 keV to 5 meV, thus encompassing a wide range of phenomena, from fundamental level transitions to phonons. The platform consists of three main instruments: a photoemission system equipped with three sources to perform HAXPES, XPS and UPS experiments. It also includes a broadband FTIR spectrometer covering the visible and infrared, as well as a Raman and photoluminescence system. The platform also has microscopy capabilities with resolution in the micrometer range over the entire spectral range. The latest equipment allows in situ (with temperature and light control) and operando (under applied polarization) measurements, to study not only materials in their original state, but also devices. The team is looking for an engineer to lead the experimental measurements on these instruments. Additional one-off measurements, carried out at the synchrotron, may also be scheduled.

Activities

*Perform X-ray photoemission measurements, as well as optical measurements on the platform's other instruments (infrared photoluminescence, Raman).
*Development for operando and in-situ measurements, both hardware and software.
*Perform data analysis, including basic processing of photoemission data, as well as more advanced processing for HAXPES data or photoemission imaging.
*Participate in measurements at large-scale facilities such as synchrotrons.
*Report results.
*Perform sample preparation for operando studies.

Skills

-969 / 5 000
The candidate should have a strong background in semiconductor physics and optics. Experience in one of the following areas would be desirable: cleanroom fabrication, cryogenic electron transport measurement, or colloidal nanocrystal manipulation. A track record of scientific publication is essential for application. A minimum of 15 publications is required to apply (strict rule). The candidate should have a strong interest in experimental work (developing new instruments and characterization measurements). The project is also highly multidisciplinary, involving chemistry, microfabrication physics, and instrumentation. You don't need to be an expert in every field, but be prepared to learn about all aspects of the project. The candidate will be working within an international team, so fluent English is required.

Work Context

1 110 / 5 000
The project is funded by the ANR DIRAC and ERC AQDtive grants, dedicated to active photonics using colloidal nanocrystals, as well as by the Île-de-France region through the Sesame (INSIDE) grant. The group currently consists of three researchers, two postdoctoral fellows, and six doctoral students, and benefits from the support of engineers in cleanroom manufacturing and chemistry. The group is highly international, and English is therefore the working language. In addition to these daily colleagues, the candidate will interact with various external users of the platform, from both academia and industry. The candidate is strongly encouraged to contact the host group (contact Emmanuel Lhuillier) for an interview and then a tour of the laboratory.

Group publications on the topic
Operando Investigation of Nanocrystal-based Device Energy Landscape: Seeing the Current Path, M. Cavallo, et al., Nano Res (2024).
Operando Photoemission Imaging of the Energy Landscape from a 2D Material based-Field Effect Transistor, D. Mastrippolito, et al, ACS Nano (2025)

Constraints and risks

handling nanoparticles, X-ray and laser