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Portal > Offres > Offre UPR8001-GUIALM-002 - Postdoc H/F en photonique

Post-doctoral Research Assistant in photonics

This offer is available in the following languages:
Français - Anglais

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General information

Reference : UPR8001-GUIALM-002
Workplace : TOULOUSE
Date of publication : Wednesday, August 07, 2019
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 6 January 2020
Proportion of work : Full time
Remuneration : 2530 et 2916 euros brut per month depending on experience
Desired level of education : PhD
Experience required : 5 to 10 years

Missions

Frequency combs (FCs) are coherent light sources that emit a broad spectrum consisting of discrete, perfectly spaced modes, each having an absolute frequency measurable within the accuracy of an atomic clock. After 20 years of development in the near-infrared and visible domains, FCs have revolutionized frequency metrology with strong impacts in other fields ranging from astronomy to communications. From these developments, mid-infrared (MIR 3-12 µm) FCs have recently become of significant interest for molecular spectroscopy.
In this context, the PDRA objective will be to make ICL laser diodes permitting the generation of ultrashort pulses (frequency comb) and to contribute their design and characterisation. The successful candidate will establish and improve nano and micro-fabrication technological processes to fabricate on GaSb substrates MIR laser diodes which will comprise several sections to promote pulsed operation, through appropriate gain broadening and dispersion management.

Activities

- Micro-fabrication of laser diodes
- Présentation of the results in projet meetings, in journal articles and at conferences
- Advise other members of the team (including PhD students) with their technological processes
- Design ultrashort pulse laser diodes
- Characterise photonic (waveguide-based) structures

Skills

- PhD in photonics, optics, applied physics or electrical engineering
- Sound knowledge of optoelectronic devices, semiconductor physics and lasers
- Knowledge and skills on microelectronic technology
- A high level of communication skills, both oral and written (French and English required) to be able to present at meeting, conferences and to write articles in scientific publications
- We are looking for a PhD fellow who will be able to become fully involved with the project, with a thirst for knowledge, a certain independence of thought and strong motivation to develop skills in photonic devices.
- Ability to work in a team on multi-disciplinary projects

Applications must include a detailed CV; at least two references (people who may be contacted); a cover letter of one page

Work Context

This PDRA is devoted to the design, fabrication and characterisatin of mid-infrared frequency combs based on interband cascade lasers et relies on the skills and expertise developped in design and technology within the Photonics team of the LAAS-CNRS. This PDRA will be part of the ANR projet « Active Comb » which also involves as academic partners, the Laboratoire de Physique de l'ENS (LPENS), the Institut d'Electronique du Sud (IES) and the Centre de Nanoscience et de Nanotechnologies (C2N).

Constraints and risks

The activity involves using lasers and fabrication in a cleanroom environment and, therefore the candidate will receive appropriate training to work safely with these tools and in this environment.

Additional Information

Frequency combs (FCs) are coherent light sources that emit a broad spectrum consisting of discrete, perfectly spaced modes, each having an absolute frequency measurable within the accuracy of an atomic clock. After 20 years of development in the near-infrared and visible domains, FCs have revolutionized frequency metrology with strong impacts in other fields ranging from astronomy to communications. From these developments, mid-infrared (MIR 3-12 µm) FCs have recently become of significant interest for molecular spectroscopy.
The ACTIVE-COMB project aims to develop compact frequency combs operating (3-5µm) MWIR spectral range with mW output powers using active and passive techniques to generate ultrashort pulses from interband cascade lasers, a type of laser diodes that exploits conventional interband transition gain with carrier cascade as introduced in quantum cascade lasers.

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