All opportunities

Offers : 19

Multi-scale modeling of the electromagnetic quantum dot environment

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Start date : 01/03/2021

offer n° PsD-DRT-21-0027

In the near future, emerging quantum information technologies are expected to lead to global breakthroughs in high performance computing and secure communication. Among semiconductor approaches, silicon-based spin quantum bits (qubits) are promising thanks to their compactness featuring long coherence time, high fidelity and fast qubit rotation [Maurand2016], [Meunier2019]. A main challenge is now to achieve individual qubit control inside qubit arrays.

Qubit array constitutes a compact open system, where each qubit cannot be considered as isolated since it depends on the neighboring qubit placement, their interconnection network and the back-end-line stack. The main goal of this post-doctoral position is to develop various implementation of spin control on 2D qubit array using multi-scale electromagnetic (EM) simulation ranging from nanometric single qubit up to millimetric interconnect network.

The candidate will i) characterize radio-frequency (RF) test structures at cryogenic temperature using state-of-the-art equipment and compare results with dedicated EM simulations, ii) evaluate the efficiency of spin control and allow multi-scale optimization from single to qubit arrays [Niquet2020], iii) integrate RF spin microwave control for 2D qubit array using CEA-LETI silicon technologies.

The candidate need to have a good RF and microelectronic background and experience in EM simulation, and/or design of RF test structures and RF characterization. This work takes place in a dynamic tripartite collaborative project between CEA-LETI, CEA-IRIG and CNRS-Institut Néel (ERC “Qucube”).

  • Keywords : Engineering sciences, Technological challenges, Electronics and microelectronics - Optoelectronics, New computing paradigms, circuits and technologies, incl. quantum, DCOS, Leti
  • Laboratory : DCOS / Leti
  • CEA code : PsD-DRT-21-0027
  • Contact : helene.jacquinot@cea.fr

New carbon materials for water-analysis sensors

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Start date : 01/03/2021

offer n° PsD-DRT-21-0058

Electrochemical sensors are commonly used for water analysis because of their sensitivity, their versatility, and their relative simplicity of implementation at the instrumental level. However, their large-scale deployment for continuous monitoring of water resources as well as discharges resulting from agricultural, industrial or residential activities is severely limited by the lifetime of the sensors. This is directly related to the durability of the materials used but also to the fouling of the electrodes during immersion. Currently, diamond electrodes as developed at CEA LIST can overcome these technical limitations (chemical inertia, regeneration of the measurement interface, etc.) but require a manufacturing process that is far too costly for the vast majority of the applications identified.

Amorphous carbon (known under the terminology “DLC” for “Diamond Like Carbon”) seems to have similar technical characteristics to diamond, for a manufacturing cost 10 to 20 times less. The aim of this project is to demonstrate the interest of this new electrode material for water analysis in the field, to increase its analytical capacities (selectivity, sensitivity) by adding inorganic catalysts and to define a low-cost production process.

Symbolically – but in line with user demands – the aim is to achieve a maintenance-free service life of one year for an autonomous system for monitoring drinking water distribution networks. The performances will be validated on a reduced set of representative sensors, for which there is a high demand (pH, free chlorine, nitrate) or which are of strong societal interest (chlorophenols, used in many pesticides).

  • Keywords : Condensed matter physics, chemistry & nanosciences, Engineering sciences, Materials and applications, Physical chemistry and electrochemistry, DTBS, Leti
  • Laboratory : DTBS / Leti
  • CEA code : PsD-DRT-21-0058
  • Contact : pascal.mailley@cea.fr

Development of Atomic Force Microscopy techniques for the characterization of piezoelectric semiconductor materials – Applications in energy conversion

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Start date : 01/02/2021

offer n° IMEPLAHC-CMNE-01-04-2021


Postdoctoral subject:
Development of Atomic Force Microscopy techniques for the characterization of piezoelectric semiconductor materials – Applications in energy conversion

IMEP-LaHC / MINATEC / Grenoble-France

Keywords:
AFM, Semiconductor Physics and technology, Nanotechnologies, Nanowires, Piezoelectricity, Multiphysics simulation.

Description of the project:
Semiconductor piezoelectric nanowires (NWs) (GaN and ZnO among others) have improved piezoelectric properties compared to thin films and bulk materials, due to their greater flexibility and sensitivity to lower forces. An intrinsic improvement in piezoelectric coefficients has also been identified by recent theoretical and experimental studies [1, 2].
These NWs can be integrated into nanocomposites (formed by NWs embedded in a dielectric matrix). Very recent theoretical studies in our team show that these nanocomposites can feature improved performance compared to thin films [3, 4]. This type of material is therefore very interesting for different innovative applications, like sensors and mechanical energy harvesting applications [5, 6, 7].

The piezoelectric performance of these nanostructures is highly affected by their semiconducting nature [4, 8]. It is thus very important to take into account the surface states and doping in the theoretical models and electromechanical characterizations. One of such characterization methods is Atomic Force Microscopy, where different modes, including the most advanced ones, can be concurrently used in order to characterize in a consistent way the electrical, mechanical and electromechanical properties of piezoelectric thin films and nanostructures [9, 10].

In the context of several European and national funded projects, the candidate will work on the AFM characterization of piezoelectric semiconducting thin layers and nanostructures (ZnO, GaN, between others). He/she will contribute to the development of new AFM techniques accompanied to theoretical simulations and to the evaluation of these nanostructures for innovative applications.

Depending on his or her expertise, the candidate will participate in the co-supervision of Master and PhD level students on several activities within the group, including (i) the characterization of nanowires and nanocomposites using AFM (Atomic Force Microscopy) techniques and (ii) the multi-physics simulation of the nanostructures and nanocomposite using commercial FEM simulation software (e. g. COMSOL Multiphysics).

The candidate will acquire expertise in (i) energy conversion using piezoelectric materials, (ii) AFM techniques (iii) electromechanical characterization of nanowires, (iv) design and simulation of transducers integrating piezoelectric semiconductor nanowires, (v) student supervision.

References:
[1] X. Xu, A. Potié, R. Songmuang, J.W. Lee, T. Baron, B. Salem and L. Montès, Nanotechnology 22 (2011)
[2] H. D. Espinosa, R. A. Bernal, M. Minary‐Jolandan, Adv. Mater. 24 (2012)
[3] R. Tao, G. Ardila, L. Montès, M. Mouis Nano Energy 14 (2015)
[4] R. Tao, M. Mouis, G. Ardila, Adv. Elec. Mat. 4 (2018)
[5] S. Lee, R. Hinchet, Y. Lee, Y. Yang, Z. H. Lin, G. Ardila, et al., Adv. Func. Mater. 24 (2014)
[6] R. Hinchet, S. Lee, G. Ardila, L. Montès, M. Mouis, Z. L. Wang Adv. Funct. Mater. 24 (2014)
[7] M. Parmar, E.A.A.L. Perez, G. Ardila, et al., Nano Energy 56 (2019)
[8] C. H. Wang et al., 4 Adv. Energy Mat. (2014)
[9] Y.S. Zhou, R. Hinchet, Y. Yang, G. Ardila et al., 25 Adv. Mater. (2013)
[10] Q. C. Bui, G. Ardila et al., 12 ACS Appl. Mater. Interfaces (2020).

More information:
Knowledge and skills required:
The candidate should hold a PhD in physics, applied physics or electrical engineering and should have a strong background in one or more of these areas: semiconductor physics, Atomic Force Microscopy (AFM), finite element simulation, clean room techniques and associated characterizations (SEM, etc.). A good level of English is required.

Location: IMEP-LaHC / Minatec / Grenoble, France
Start of the contract: February/Mars 2021
Duration of the contract: 1 year, renewable eventually
Advisor:Gustavo ARDILA (ardilarg@minatec.grenoble-inp.fr)
About the laboratory:
IMEP-LAHC is located in the Innovation Center Minatec in Grenoble. It works in close partnership with several national and international laboratories and industrial groups, preindustrial institutes and SMEs. The post-doctoral fellow will work in the Micro-Nano Electronics Components team, in the Integrated Nanostructures & Nanosystems group, and will have access to the laboratory’s technological (clean room) and characterization platforms.

Contacts:
Gustavo ARDILA ardilarg@minatec.grenoble-inp.fr +33 (0)4.56.52.95.32

  • Keywords : Engineering science, Electronics and microelectronics - Optoelectronics, FMNT, IMEP-LaHc
  • Laboratory : FMNT / IMEP-LaHc
  • CEA code : IMEPLAHC-CMNE-01-04-2021
  • Contact : ardilarg@minatec.grenoble-inp.fr

Development of Atomic Force Microscopy techniques for the characterization of piezoelectric semiconductor materials – Applications in energy conversion

Mail Sélection

Start date : 01/02/2021

offer n° 20201215

Description of the project:

Semiconductor piezoelectric nanowires (NWs) (GaN and ZnO among others) have improved piezoelectric properties compared to thin films and bulk materials, due to their greater flexibility and sensitivity to lower forces. An intrinsic improvement in piezoelectric coefficients has also been identified by recent theoretical and experimental studies [1, 2]. These NWs can be integrated into nanocomposites (formed by NWs embedded in a dielectric matrix). Very recent theoretical studies in our team show that these nanocomposites can feature improved performance compared to thin films [3, 4]. This type of material is therefore very interesting for different innovative applications, like sensors and mechanical energy harvesting applications [5, 6, 7].
The piezoelectric performance of these nanostructures is highly affected by their semiconducting nature [4, 8]. It is thus very important to take into account the surface states and doping in the theoretical models and electromechanical characterizations. One of such characterization methods is Atomic Force Microscopy, where different modes, including the most advanced ones, can be concurrently used in order to characterize in a consistent way the electrical, mechanical and electromechanical properties of piezoelectric thin films and nanostructures [9, 10].
In the context of several European and national funded projects, the candidate will work on the AFM characterization of piezoelectric semiconducting thin layers and nanostructures (ZnO, GaN, between others). He/she will contribute to the development of new AFM techniques accompanied to theoretical simulations and to the evaluation of these nanostructures for innovative applications.
Depending on his or her expertise, the candidate will participate in the co-supervision of Master and PhD level students on several activities within the group, including (i) the characterization of nanowires and nanocomposites using AFM (Atomic Force Microscopy) techniques and (ii) the multi-physics simulation of the nanostructures and nanocomposite using commercial FEM simulation software (e. g. COMSOL Multiphysics).
The candidate will acquire expertise in (i) energy conversion using piezoelectric materials, (ii) AFM techniques (iii) electromechanical characterization of nanowires, (iv) design and simulation of transducers integrating piezoelectric semiconductor nanowires, (v) student supervision.

 

References:

[1] X. Xu, A. Potié, R. Songmuang, J.W. Lee, T. Baron, B. Salem and L. Montès, Nanotechnology 22 (2011)
[2] H. D. Espinosa, R. A. Bernal, M. Minary‐Jolandan, Adv. Mater. 24 (2012)
[3] R. Tao, G. Ardila, L. Montès, M. Mouis Nano Energy 14 (2015)
[4] R. Tao, M. Mouis, G. Ardila, Adv. Elec. Mat. 4 (2018)
[5] S. Lee, R. Hinchet, Y. Lee, Y. Yang, Z. H. Lin, G. Ardila, et al., Adv. Func. Mater. 24 (2014)
[6] R. Hinchet, S. Lee, G. Ardila, L. Montès, M. Mouis, Z. L. Wang Adv. Funct. Mater. 24 (2014)
[7] M. Parmar, E.A.A.L. Perez, G. Ardila, et al., Nano Energy 56 (2019)
[8] C. H. Wang et al., 4 Adv. Energy Mat. (2014)
[9] Y.S. Zhou, R. Hinchet, Y. Yang, G. Ardila et al., 25 Adv. Mater. (2013)
[10] Q. C. Bui, G. Ardila et al., 12 ACS Appl. Mater. Interfaces (2020).

More information:

Knowledge and skills required:
The candidate should hold a PhD in physics, applied physics or electrical engineering and should have a strong background in one or more of these areas: semiconductor physics, Atomic Force Microscopy (AFM), finite element simulation, clean room techniques and associated characterizations (SEM, etc.). A good level of English is required.
Location: IMEP-LaHC / Minatec / Grenoble, France
Start of the contract: February/Mars 2021
Duration of the contract: 1 year, renewable eventually
Advisor: Gustavo ARDILA (ardilarg@minatec.grenoble-inp.fr) +33 (0)4.56.52.95.32
About the laboratory: IMEP-LAHC / MINATEC / Grenoble (http://www.imep-lahc.grenoble-inp.fr)
IMEP-LAHC is located in the Innovation Center Minatec in Grenoble. It works in close partnership with several national and international laboratories and industrial groups, preindustrial institutes and SMEs. The post-doctoral fellow will work in the Micro-Nano Electronics Components team, in the Integrated Nanostructures & Nanosystems group, and will have access to the laboratory’s technological (clean room) and characterization platforms.
Contacts:
Gustavo ARDILA ardilarg@minatec.grenoble-inp.fr

  • Keywords : Condensed matter physics, chemistry & nanosciences, Electronics, Engineering science, Engineering sciences, Technological challenges, Electronics and microelectronics - Optoelectronics, Materials and applications, Theoretical Physics, FMNT, IMEP-LaHc
  • Laboratory : FMNT / IMEP-LaHc
  • CEA code : 20201215
  • Contact : ardilarg@minatec.grenoble-inp.fr

Variable Capacitor MEMS Devices for Boolean Logic Operation at High Temperature

Mail Sélection

Start date : 01/01/2021

offer n° PsD-DRT-21-0013

The objective is to design a new generation of MEMS to achieve a variable capacitance devices controlled through an electrostatic actuation. These devices will be integrated in logic gates structures to ensure reliable Boolean operations at high-temperature. This study is based on a complete breakthrough proposal compared to the classical transistor-based logic to distinghish the logic state even in a large thermal bath. The postdoctoral PhD student will propose, model and simulate electro-mechanical micro fabricated structures to validate the theoretical principle recently announced by some senior-scientists in our laboratory. The project involves other leading universities and it is an excellent opportunity for post doc’ to be in advanced research program.

  • Keywords : Technological challenges, Emerging materials and processes for nanotechnologies and microelectronics, New computing paradigms, circuits and technologies, incl. quantum, DCOS, Leti
  • Laboratory : DCOS / Leti
  • CEA code : PsD-DRT-21-0013
  • Contact : gael.pillonnet@cea.fr
More information
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