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Portail > Offres > Offre UMR8111-MOHBOU-001 - Chercheur postdoc en développement de détecteurs à inductance cinétique pour l'astronomie visible et infra-rouge H/F

Postdoc in development of near-infrared and visible kinetic Inductance Detectors for astronomy M/F

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Français - Anglais

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General information

Reference : UMR8111-MOHBOU-001
Workplace : PARIS 14
Date of publication : Tuesday, September 15, 2020
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 1 January 2021
Proportion of work : Full time
Remuneration : Between 2,695 and 4,019 euros gross monthly depending on experience
Desired level of education : PhD
Experience required : 1 to 4 years


Development of near-infrared and visible infrared kinetic inductance detectors at Galaxies, Stars, Physics and Instrumentation (GEPI) laboratory at Paris Observatory in close collaboration with its partners (APC-University of Paris Diderot, LESIA-Paris Observatory, LAB-University of Bordeaux and Institut Néel-CNRS). The candidate will be particularly involved in the implementation of the instrument which includes a 100mK cryostat and a dedicated readout electronics. The candidate will also be involved in the implementation of new optical detector geometries of by investigating their performance at very low temperature (≤100 mK).


- Set up tests to validate operation and intrinsic performance of optical MKIDs.
- Carry out test and characterizations in a cryogenic environment and analysis of results.
- Integration of MKID arrays within the instrument readout system.
- Characterization of physical and superconducting properties (resistivity, critical temperature, etc.) of the materials from which the detectors will be made.
- Design of superconducting near-infrared and visible detectors using electromagnetic simulation software.


The candidate should have a solid background in :
- Solid state physics, in particular superconductivity.
- Characterization of superconducting materials.
- Measurement and characterization of superconducting detectors, especially MKIDs, at sub-Kelvin temperatures.
- Design and simulation of superconducting microwave circuits.
The candidate must be familiar with electromagnetic simulation software such as Sonnet, CST and HFSS as well as programming software such as Matlab, Python and labview.
The candidate will work in a team, but must also demonstrate autonomy, rigor and dynamism. The candidate must be able to synthesize his or her work and promote it through publications and presentations at international conferences.

Work Context

The candidate will join GEPI, one of the scientific departments of Paris Observatory which is also a Joint Research Unit of CNRS. The unit has an activity strongly focused on the study of galaxy formation and evolution. The activities are both scientific, technological and intrumental. GEPI is structured into two poles : a scientific pole and an instrumental pole. GEPI is strongly involved in Gaia space mission (responsible for the data processing of the on-board spectrograph) and in WEAVE, MOONS and MOSAIC multi-object spectrographs.

The candidate will be part of the R&T team, within Pole Instrumental.
GEPI has a staff of 93 people, including 17 permanent researchers and associate professors.
The candidate will be part of SPIAKID project, funded by the European Research Council (ERC).

Constraints and risks

It may be decided to use lasers to characterize the energy resolution of detectors. The candidate could also work in the GEPI clean room facility
where chemicals will be used. This requires compliance with regulations and procedures implemented by the staff in charge of the cleanroom.

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