23 May 2024
Job Information
- Organisation/Company
Université de Franche-Comté- Research Field
Physics
Engineering- Researcher Profile
Recognised Researcher (R2)
Leading Researcher (R4)
First Stage Researcher (R1)
Established Researcher (R3)- Country
France- Application Deadline
30 Aug 2024 - 22:00 (UTC)- Type of Contract
Temporary- Job Status
Full-time- Offer Starting Date
1 Oct 2024- Is the job funded through the EU Research Framework Programme?
Not funded by an EU programme- Is the Job related to staff position within a Research Infrastructure?
No
Offer Description
This thesis work is part of the NanoFiLN project funded by the electronic PEPR program ( https://www.pepr-electronique.fr/ ) in the frame of the investment plan “France 2030”. It brings together 5 French laboratories (FEMTO-ST, LAAS, INPHYNI, C2N, CEA-LETI) whose joint objective is to establish a national technological sector for the development of new generation integrated optical components based on the use of LiNbO3 nanofilms. This configuration allows an optimized exploitation of electro-optical and nonlinear effects, which are key properties of this material transparent from UV to mid-infrared. The nanoguides at the heart of these high-performance photonic components open the way to the creation of chips integrating multiple functions with potential interest for different domains such as telecoms, quantum optics or environmental analyzes [1]. Ultimately, the hybridization of these LiNbO3 nanocomponents with other complementary platforms (Si, SiN, III-V) makes it possible to envision the creation of photonic devices for complex signal processing with a wide spectrum of applications.
In this context, the objective of the doctoral work is to study optical frequency converters with very high conversion efficiency. The targeted performances rely on an enhancement of the second-order nonlinear effect of LiNbO3 thanks to extreme confinement of the optical processed signals in low-loss nanoguides. In addition to frequency conversion, such architecture can be used as a source of twin photons with high-brightness expected to generate the Qubits at the heart of future quantum computers.
After an in-depth bibliographic analysis, this thesis work will begin with the design/modeling stage of components using software dedicated for guided optics (Rsoft) and Comsol simulations. The manufacturing of the structures will then rely on cutting-edge equipment from the MIMENTO micro and nanotechnology center at FEMTO-ST. This will be followed by a detailed characterization of the components performance in order to optimize the structures and manufacturing processes.
This doctoral work with balanced activities between simulations, manufacturing and characterizations will mainly take place at the optics department of the FEMTO-ST institute in Besançon within the nonlinear optics team. It will benefit from a close partnership with members of the NanoFiLN project consortium as well as with the engineers of the MIMENTO center.
1) Chen, G., et. al, (2022). Advances in lithium niobate photonics: development status and perspectives. Advanced Photonics, 4(3), 034003-034003. https://doi.org/10.1117/1.AP.4.3.034003
Funding category: Contrat doctoral
PHD title: Doctorat optique et photonique
PHD Country: France
Requirements
Specific Requirements
Any candidate motivated to develop skills at the interface between nanotechnologies and optics is urged to apply. Knowledge in optics and/or nanotechnology/nanofabrication and/or materials science and a motivation for experimental work will be favored.
Additional Information
Work Location(s)
- Number of offers available
- 1
- Company/Institute
- Université de Franche-Comté
- Country
- France
- City
- Besançon
- Geofield
Where to apply
- Website
https://www.abg.asso.fr/fr/candidatOffres/show/id_offre/123891
Contact
- Website
http://www.femto-st.fr/en
STATUS: EXPIRED