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Offers : 109

Packaging and miniaturization technology implementation for integrated spectrometer realization: high spectral resolution in the SWIR for telecom and greenhouse gas monitoring

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Start date : 01/09/2022

offer n° IMEPLAHC-PHOTO-05-05-2022

                                  E C O L E   D O C  T O R A L E    EEATS

              Electronique, Electrotechnique, Automatique, Traitement du Signal

               Proposition de thèse, avec financement propre, à démarrer en 2022-2023
Thesis title :
«Packaging and miniaturization technology implementation for integrated spectrometer realization:
high spectral resolution in the SWIR for telecom and greenhouse gas monitoring
 »

Laboratoire d’accueil :
IPAG, équipe instrumentation « CHARM »
IMEP-LAHC, équipe photonique, « PHOTO »

Spécialité de la thèse :
Optique – radiofréquences (OR)

Nature du financement :
Financement Projet Région – Pack Ambition Recherche (obtenu)

Contact pour candidater :
Guillermo Martin,
Institut de Planétologie et d’Astrophysique de Grenoble, Université Grenoble Alpes, Bât OSUG A (CS 40700)
38058 Grenoble Cedex 9
Tél: 04 76 63 52 76
guillermo.martin@univ-grenoble-alpes.fr

Alain Morand, MCF HDR EEATS, IMEP-LAHC, 50%
Institut de Microélectronique d’Electromagnétisme et de Photonique de Grenoble
Tél: 04 56 52 94
alain.morand@univ-grenoble-alpes.fr
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Abstract :
In the recent years, a lot of researchs have been focused on the miniaturization of optical spectrometers. Indeed, these devices are important for optical signal caracterization. The objective of this work is to develop and realize an optical spectrometer having both a compact size and high optical spectral resolution. It is based on the use of a glass integrated photonic chip composed of a straight waveguide finished by a mirror. Nano scattering centers considered as antennas are set on the waveguide surface. Each antenna transmits an optical signal on each camera pixel directly bonded at the surface wafer. The mirror at the end of the waveguide makes a stationary wave in the straight waveguide. The antennas allow to depict the optical intensity of the stationary wave. Then the optical spectrum of the signal can be obtained by applying a fast inverse fast Fourier transform. This approach has already been developed in the wavelength range from 700nm to 1000nm. Now, we are trying to extend this spectrometer skills in the SWIR (from 800nm to 1700nm). A novel approach of the antenna design is proposed to limit the crosstalk on each SWIR camera pixel. The objectives of this work are firstly to optimize the antenna realization used for the sampling. Secondly, the student will develop our ability to package the glass chip with the camera in order to have an airborne equipment.

Profil et skills required :
Student recently graduate from a master degree of Physics, Optical, Optoelectronic, Engineering school (Sup Opt, Phelma …)
Experimental profil, optical characterization, optical set-up use with programming knoweledge (Python, Matlab, Mathcad…), simulation software and visual programming language to control instrument (Labview).
– Propagation waveguide characterization and nano antenna scattering analyis. Data processing, spectrum reconstruction from inverse Fourier Transform, inversion method or least mean square method.
-Modelisation of the waveguide propagation and of the antenna scattering

Profil et compétences requises
Étudiant(e) sortant d’une formation type M2 de Physique Recherche & Innovation, Physique Générale, Optique, Optoélectronique, Ecole d’Ingénieur (Sup Optique, Phelma, …)
Étudiant(e) à profil plutôt expérimental, caractérisation optique, montage de bancs optiques, avec des connaissances en programmation (Python, Matlab, Mathcad…), logiciels de simulation, pilotage (Labview).

– Caractérisation de guides d’onde (propagation) sur lesquelles nous avons réalisé des nano-antennes (diffraction). Traitement des données, reconstruction du spectre par Transformée de Fourier inverse, méthodes d’inversion (Matrices Pseudo-Inverses), minimisation (moindres carrés).

– Modélisation des phénomènes de propagation et interférence du signal optique dans les guides d’onde et extrait de ceux-ci grâce aux plots diffusants.

  • Keywords : Engineering sciences, Electronics and microelectronics - Optoelectronics, FMNT, IMEP-LaHc
  • Laboratory : FMNT / IMEP-LaHc
  • CEA code : IMEPLAHC-PHOTO-05-05-2022
  • Contact : alain.morand@univ-grenoble-alpes.fr

Silicon-on-insulator sensors based on out-of-equilibrium potential reading

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Start date : 03/10/2022

offer n° IMEPLAHC-CMNE-3-25-2022

Silicon-on-insulator sensors based on out-of-equilibrium potential reading
Deadline for application: the 23rd of May 2022
Beginning of contract: the 1st of Oct. 2022

 

 

Place:
IMEP – LAHC, MINATEC – INPG, 3, Parvis Louis Néel, 38016, Grenoble

Advisor:
Irina Ionica (Associate Professor Grenoble ING)

Contact:
Irina IONICA +33 (0) 4 56 52 95 23

Context and objectives:
Among the sensing devices, the ISFETs (Ion Sensing Field Effect Transistor) occupy an important position thanks to many possible advantages, such as easy co-integration with reading circuitry. However, one of the difficulties when using ISFETs, especially for in-liquid sensing, is that the presence of the gate liquid on the top, close to the channel, can damage the MOSFET. Alternative architectures such as extended-gate FETs¹ can partially solve this issue. In such a case, the sensing part (which is in contact with the liquid) is separated by the transducer (the MOSFET) and this ensures a longer lifetime of the MOSFET, without suffering from any damage due to liquid.
Additionally this separation also allows envisioning hybrid architecture with a silicon-based MOSFET and a sensing region the uses “eco-friendly” / sustainable materials, eventually very cheap and disposable.
The objective of this thesis is to test the possibility to implement such a sensing configuration, using a simple transistor fabricated on silicon-on-insulator (SOI). Besides the novel architecture, the originality of the topic lays in the signal used for the detection: instead of a classical shift in the current through the transistor, the sensing will be done based on the out-of-equilibrium body potential, a phenomenon specific to SOI devices² In our group, we showed that the body-potential response is due to the presence of the Schottky barriers at the contacts³ and that it can be used for sensing4 However, progress is still needed to go from a “laboratory” nice reading paradigm towards a more realistic device with optimized performances in terms of linearity, sensitivity, noise and consumption and this is the aim of this multidisciplinary thesis.

Research to be performed:
In order to reach a pragmatic sensor, starting from our previous proof-of-concept studies some additional steps are needed:

  • validate the out-of-equilibrium body potential signature for an extended-gate FET configuration
  • optimize the device architecture for sensing, in order to exploit at best the physical mechanisms responsible for the out-of-equilibrium potential
  • find the appropriate dynamic conditions of potential reading
  • implement a sustainable sensing layer as extended gate for a realistic bio-chemical application.

The PhD student will develop the complete chain, from device fabrication, electrical measurements in equilibrium and out-of-equilibrium conditions, surface functionalization for specific detection applications (collaboration with Néel Institute, LMGP…). The experimental characterization part will be completed by
segments of modeling and simulation, allowing the comprehension of physical phenomena involved and the
optimization for the sensor.

Knowledge and skills required:
This PhD topic belongs mainly to the field of micro-nano-electronics, and more precisely to the sensing with ISFETs fabricated on SOI substrates. The candidate must have a solid knowledge of physics of semiconductors and devices. Electronics of the measurement systems, surface functionalization would be appreciated. The candidate is expected to enjoy experimental work and the development of adapted measurement protocols.
Scientific curiosity, motivation, creativity are mandatory qualities in order to take full advantage of the scientific environment of this thesis and to gain excellent expertise for his/her future career. The topic is in the field of applied physics, but close to the fundamental physics, as well as to the industrial world.
After the PhD, the candidate will easily adapt to both academic and industrial research environments.
The candidate must have a very good academic record, with high grades.

____________________________________________________________________________________________
1 Won-Ju Cho, Cheol-Min Lim, Sensing properties of separative paper-based extended-gate ion-sensitive field-effect transistor for cost
effective pH sensor applications, Solid-State Electronics, Volume 140, pages 96-99, 2018
2 M. Alepidis, A. Bouchard, C. Delacour, M. Bawedin and I. Ionica, “Out-of-Equilibrium Body Potential Measurement on Silicon-on-
Insulator With Deposited Metal Contacts,” in IEEE Transactions on Electron Devices, vol. 67, no. 11, pp. 4582-4586, 2020
3 Alepidis, M., Ghibaudo, G., Bawedin, M., & Ionica, I., Origin of the Out-of-Equilibrium Body Potential In Silicon on Insulator Devices With Metal Contacts. IEEE Electron Device Letters, 42(12), 1834-1837, 2021
4 Alepidis, M., Bouchard, A., Delacour, C., Bawedin, M., & Ionica, I., Novel pH sensor based on out-of-equilibrium body potential
monitored in silicon on insulator with metal contacts. In ECS Meeting Abstracts (No. 59, p. 1589). IOP Publishing, 2021

  • Keywords : Engineering science, Engineering sciences, Electronics and microelectronics - Optoelectronics, FMNT, IMEP-LaHc
  • Laboratory : FMNT / IMEP-LaHc
  • CEA code : IMEPLAHC-CMNE-3-25-2022
  • Contact : Irina.Ionica@phelma.grenoble-inp.fr

VHF voltage regulated converter incorporating innovative passive components

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Start date : 01/09/2022

offer n° SL-DRT-22-0658

The aim of the thesis is to develop a very high frequency voltage regulated converter (> 10 MHz) and exploiting innovative passive components. The increase in frequency allows the use of smaller passive components in value, size and weight. Indeed, the higher the frequency is, the lower the energy is stored and exchanged per cycle, the lower the volume of the inductor and / or capacity is and the higher the power density of the converter is. Moreover, a high switching frequency allows a faster converter response to operating condition changes (shorter response time).

However, when the converters operate at more than 10MHz, commonly used structures, even conventional resonant structures, are no longer suitable even via Zero Voltage Switching (ZVS). This is why a new inverter topology, breaking with half or full bridge topologies is being considered.

The objective of the thesis is to make VHF structures usable for common purposes by making the converter completely controllable: automatic frequency tracking, ZVS and output voltage regulation at the desired value. In addition, we aim to reduce, or even eliminate, the remaining inductances to gain compactness and EMC. We will also explore galvanic insulation aspects.

  • Keywords : Défis technologiques, Sciences pour l'ingénieur, Efficacité énergétique pour bâtiments intelligents, mobilité électrique et procédés industriels, Electronique et microélectronique - Optoélectronique, DSYS, Leti
  • Laboratory : DSYS / Leti
  • CEA code : SL-DRT-22-0658
  • Contact : sebastien.carcouet@cea.fr

Design of new heptazine-based catalysts for applications in the carbon circular economy

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Start date : 01/10/2022

offer n° SL-DRF-22-0267

The aim of this project is the conception of new catalysts for energy applications (CO2 reduction in methanol or formic acid, H2 formation etc…). Those catalysts will be based on graphitic carbon nitride (g-C3N4) derivatives in association with transition metals from first row. Our approach will include a molecular catalysis strategy using heptazine-based ligands and a heterogeneous catalysis strategy based on g-C3N4 functionalization. A systematic study of structure/activity relationships will allow the development of efficient and selective catalysts. To that end, classical characterization methods (Electrochemistry, EPR, NMR, UV-vis, GC-MS, DRX…) but also coupled methods (UV-vis/Electrochemistry, EPR/UV-vis, EPR/Electrochemistry) will be used.

  • Keywords : Défis technologiques, Physique de l'état condensé, chimie et nanosciences, Chimie, Energie verte et/ou décarbonnée dont bioprocédés et valorisation des déchets, IRIG, SyMMES
  • Laboratory : IRIG / SyMMES
  • CEA code : SL-DRF-22-0267
  • Contact : julie.andrez@cea.fr

Cooperative and heterogeneous multi-agent learning for 6G network orchestration

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Start date : 01/09/2022

offer n° SL-DRT-22-0250

In beyond 5G/6G networks , it is imperative to easily deploy and manage a private/ad-hoc network of mobile users such as a fleet of vehicles or drones. The objective of this thesis is to define strategies and associated protocols (control and resource allocation) to self-organize “mesh” networks of mobile users.

The research questions are: (i) How to manage a cooperative multi-agent system for the orchestration and self-organization of a 6G network? (ii) How to orchestrate a distributed multi-objective network? (iii) Are the multi-agent approach and network reconfiguration compatible with the dynamics of the environment?

While existing studies focus on problems aiming at optimizing a single objective function with homogeneous agents, we are interested in local/distributed multi-agent cooperative learning between heterogeneous users/moving agents (with different optimization functions).

The first step of this thesis will be to optimize heterogeneous multi-objective functions for a 6G network with a central orchestrator. The second step of this thesis will concern cooperative heterogeneous multi-agent systems and interactions between agents (concurrent learning, team learning, …) to jointly solve tasks and maximize utility. The last step of this thesis will concern a Hybrid approach (Centralized and Distributed)

  • Keywords : Défis technologiques, Data intelligence dont Intelligence Artificielle, Réseaux de communication, internet des objets, radiofréquences et antennes, DSYS, Leti
  • Laboratory : DSYS / Leti
  • CEA code : SL-DRT-22-0250
  • Contact : mickael.maman@cea.fr
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