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RESISTIVE MEMORY TECHNOLOGIES WITH MULTI-SCALE TIME CONSTANTS FOR NEUROMORPHIC ARCHITECTURES (POST-DOC) Start date : 01/10/2020 offer n°PsD-DRT-20-0089 The work is based on a dedicated commitment that novel hardware and novel computational concepts must be co-evolved in a close interaction between nano-electronic device engineering, circuit and microprocessor design, fabrication technology and computing science (machine learning and nonlinear modeling). A key to reflecting "hardware physics" in "computational function" and vice versa is the fundamental role played by multiple timescales. Laboratory: DCOS / Leti Code CEA : PsD-DRT-20-0089 Contact : [email protected] STUDY AND DEVELOPMENT OF PIEZOTRONIC BIOSENSORS BASED ON ZNO (THÈSE) Start date : 01/09/2020 offer n°IMEPLAHC-05152020-CMNE PhD thesis subject: Study and development of piezotronic biosensors based on ZnO IMEP-LaHC / MINATEC / Grenoble-France Deadline for application: May 31th 2020 Keywords: Nanotechnologies, Nanowires, Piezoelectricity, Biosensor, Semiconductor Physics and technology. Description of the project: Semi-conductor piezoelectric nanowires (NWs) (of GaN or ZnO among others) have improved piezoelectric properties compared to thin films and bulk materials, because of their greater flexibility, their sensitivity to weaker forces, and also, due to an intrinsic improvement in their piezoelectric coefficients which has been identified by recent theoretical and experimental studies [1, 2]. The coupling of piezoelectric polarization and semiconducting properties of the nanostructures allow the design of new “piezotronic” devices with new functionalities and improved performance. They can be used in applications like pressure or strain sensors, biosensors, photodetectors, etc. [3, 4, 5]. In France, the IMEP-LaHC has contributed in this area with the study of several piezotronic devices based in NWs [6, 7]. These studies have been realized in collaboration with different laboratories and research institutes in France and abroad. In this domain, several devices have been explored but very few studies have been reported about their reliability and lifetime. The objective of this thesis will be the design, study and development of new architectures of biosensors exploiting the piezotronic effect on NWs. The purpose is to develop biosensors with high sensitivity, reliability and lifetime. The student will have at his disposal all the experimental facilities of the laboratory, as well as access to the PTA technological platform for the preparation of specific test structures (metallization of contacts, connections, etc.). The NWs will be developed at the IMEP-LaHC or will be accessible through different collaborations. The surface functionalization and biological manipulations will be realized as well through collaborations (LMGP, INL, Institute Néel, INAC...). 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] Y. Zhang, Y. Liu and Z. L. Wang, Advanced Materials 23 (2011) [4] X. Wang, Am. Ceram. Soc. Bull, 92 (2013). [5] K. Jenkins, V. Nguyen, R. Zhu and R. Yang, Sensors 15 (2015) [6] M. Parmar, E. A. A. L. Perez, G. Ardila, E. Saoutieff, E. Pauliac-Vaujour and M. Mouis, Nano Energy 56 (2019) [7] Y.S. Zhou, R. Hinchet, Y. Yang, G. Ardila, R. Songmuang, F. Zhang, Y. Zhang, W. Han, K. Pradel, L. Montes, M. Mouis and Z.L. Wang, Adv. Mater. 25 (2013) More information: Knowledge and skills required: It is desirable that the candidate has knowledge in one or more of these areas: semiconductor physics, piezoelectricity, clean room techniques and associated characterizations (SEM, etc.), surface functionalization, biosensors. The grades and the rank as undergraduate and especially for the Master degree are a very important selection criterion for the doctoral school. Location: IMEP- LaHC / Minatec / Grenoble, France Doctoral school: EEATS (Electronics, Electrical engineering, Automatism, Signal processing), specialty NENT (Nano Electronics Nano Technologies). About the laboratory: IMEP-LAHC / MINATEC / Grenoble IMEP-LAHC is located in the Innovation Center Minatec in Grenoble. The main research areas concern Microelectronic devices (especially CMOS, SOI), Nanotechnologies, Photonic and RF devices. It works in close partnership with several industrial groups (such as ST-Microelectronics, IBM, or Global Foundries), preindustrial institutes (such as LETI, LITEN, IMEC, or Tyndall), as well as SMEs (e.g. CEDRAT). The PhD thesis will be carried out within the group working on MicroNanoElectronic Devices /Nanostructures & Nanosystems. The student will have access to several technological (clean room) and characterization platforms. Contacts: Gustavo ARDILA : [email protected] Laboratory: FMNT / IMEP-LaHc Code CEA : IMEPLAHC-05152020-CMNE Contact : [email protected] COUPLING OF OPTOMECHANICAL RESONATORS IN QUANTUM REGIME FOR MICROWAVE TO INFRARED PHOTONS CONVERSION (POST-DOC) Start date : 01/10/2020 offer n°PsD-DRT-20-0036 The most promising quantum computing platforms today are operated at very low temperatures at microwave frequencies, while telecommunication networks capable of preserving information in non-conventional states (superposition, entanglement) use infrared photons in non-cryogenic environments. Current frequency conversion means offer poor conversion efficiencies (10-6), which make them unable to preserve the quantum nature of information. A very high efficiency optical microwave converter (>0.5) is an essential milestone to connect these two frequency domains and create a real network of distributed quantum computers (quantum internet). In this context, this post doc topic aims to develop such a converter by exploiting the multi-scale coupling properties of nanomechanical resonators NEMS. Work is currently underway at Leti to address NEMS resonators in their fundamental state by an optomechanical coupling with microwave resonators. The objective of the post doc is to continue these efforts by integrating a high quality infrared optical cavity. To do this, he will be able to rely on the know-how put in place at Leti: the laboratory is one of the pioneers in the development of on-chip optomechanical transduction sensors that guide light in silicon and make it interact with a moving object such as a mechanical resonator. A collaboration is in place with the Néel Institute (CNRS) in Grenoble to characterize and study these devices at ultra-low temperature (<100 mK). The post-doctoral fellow will have to propose designs that can target the expected high levels of efficiency. The devices will be manufactured in Leti's clean room and must be compatible with industrial manufacturing scale-up (VLSI), then tested and compared to expected performance. It will then be necessary to review the modelling and design based on the measurements in order to ensure that all phenomena are understood. Laboratory: DCOS / Leti Code CEA : PsD-DRT-20-0036 Contact : [email protected] NON-VOLATILE ASYNCHRONOUS MAGNETIC SRAM DESIGN (POST-DOC) Start date : 01/10/2020 offer n°PsD-DRT-20-0069 In the applicative context of sensor nodes as in Internet of things (IoT) and for Cyber Physical Systems (CPS), normally-off systems are mainly in a sleeping state while waiting events such as timer alarms, sensor threshold crossing, RF or also energetic environment variations to wake up. To reduce power consumption or due to missing energy, the system may power off most of its components while sleeping. To maintain coherent information in memory, we aim at developing an embedded non-volatile memory component. Magnetic technologies are promising candidates to reach both low power consumption and high speed. Moreover, due to transient behavior, switching from sleeping to running state back and forth, asynchronous logic is a natural candidate for digital logic implementation. The position is thus targeting the design of an asynchronous magnetic SRAM in a 28nm technology process. The memory component will be developed down to layout view in order to precisely characterize power and timing performances and allow integration with an asynchronous processor. Designing such a component beyond current state of the art will allow substantial breakthrough in the field of autonomous systems. Laboratory: DACLE / Leti Code CEA : PsD-DRT-20-0069 Contact : [email protected] DEVELOPMENT OF A 3D MODELING TOOL TO MODELIZE INTEGRATED OPTICAL STRUCTURE WITH COMPLEX PROFILE (THÈSE) Start date : 01/09/2020 offer n°IMEPLaHC-03112020-PHOTO PHD subject, duration 36 months Development of a 3D modeling tool to modelize integrated optical structure with complex profile Contact: Alain MORAND [email protected] Photonic devices can be developed in different substrates (Silicon, Nitride, Glass …). To design integrated optic functions, numerical modelling tools are necessary as FDTD, FMM, BPM … These tools are already distributed commercially by different companies. All of these methods suffer from the staircase approximation. The space domain is in fact discretized in small sections (square most of the time) which don’t follow exactly the boundary of a waveguide. An artificial roughness appears at the interface inducing reflection or scattering. The objective of this PHD is to develop a 3D tool to minimize this effect in order to reach the ideal structure. Complex profile or real roughness waveguide could after be simulated