Quantip
Région Ile de France
07/05/2026

News > Job > Offre d'emploi permanent
Research and Development Engineer, responsible for the integration and operation of an optical test platform for quantum sensor components and radio frequency field metrology

Laboratory : LuMIn
Place : 4 avenue des sciences, Gif-sur-Yvette
Offer

Missions

Development of laser and optical systems and operation of a test platform for quantum sensors for radio frequency field metrology

  • Manage an optical test platform for radiofrequency quantum field sensor components
  • Develop, simulate, and optimize the components of the test platform (lasers, control systems, detectors, atomic cells, modulators, RF circuits, etc.)
  • Manage external collaborations to provide access to the platform’s resources for the community of developers and users of radiofrequency quantum field sensors
  • Participate and contribute to the organization and activities of the host laboratory: organizing and participating in scientific events (e.g., seminars, future-oriented workshops), participating in various laboratory bodies (e.g., laboratory council, thematic working groups), and participating in communication initiatives about the laboratory.
  • Conduct negotiations with a supplier
  • Manage a budget
  • Conduct scientific and technological monitoring

Profile

Knowledge:

  • Laser technology and control systems for metrology
  • Photonics components
  • Digital and/or analog electronics
  • Finite element simulations for radiofrequency electromagnetic fields

Operational skills:

  • Integrate a range of elements from different technological fields (optics, lasers, electronics, data acquisition, radio frequencies)
  • Lead a project in a national or international context and in partnership with industry partners
  • Use field-specific software (Python, MATLAB, High-Frequency Structure Simulator, Alkali Rydberg Calculator library)
  • Participate in the supervision of young researchers
  • Facilitate a meeting
  • Apply health and safety regulations
  • Apply public procurement regulations
  • Project management
  • English level B2

Soft skills:

  • Ability to work in a team
  • Organizational skills
  • Attention to detail

Context

The Light, Matter, and Interfaces Laboratory is a joint research unit (UMR 9024) of the CNRS, ENS Paris-Saclay, Paris-Saclay University, and CentraleSupélec, located on the Saclay Plateau (Orsay and Gif-sur-Yvette). It comprises approximately 30 permanent researchers and faculty members, about ten technical and administrative staff, and approximately 40 doctoral students and non-permanent researchers. The laboratory specializes in photonics applied to various fields of physics, engineering, materials science, biology, and quantum technologies. The engineer will be a member of the laboratory’s technical department, reporting directly to the unit director. He or she will primarily work on the radiofrequency quantum field sensor development platform located in Building 505 of the Orsay School of Sciences, in collaboration with two permanent LuMIn researchers, postdoctoral fellows, technicians (mechanical, laser, and electronics), engineers, and Ph.D. students from LuMIn, as well as partner laboratories and industry partners, both French and international, in order to make the platform’s resources available to the community and to contribute to the technological development of radiofrequency quantum field sensors.

25/03/2026

News > Job > Offre de stage
Vibrational properties of a pulse-tube cryostat for quantum metrology

Laboratory : Laboratoire Temps-Espace
Place : Observatoire de Paris
Manager : Bess Fang-Sortais
Offer

Background

Time and frequency metrology is one of the most successful fields of high accuracy measurement today. Microwave and optical frequency standards now realize accuracies in terms of fractional frequency in the 10-16 range, ensuring a vast variety of applications from practical day-to-day time keeping (realization of SI second, atomic international time, satellite navigation systems, timing and synchronization at various geographical scales, etc…) to the most demanding fundamental research experiments (measurement of the drift of fundamental constants, tests of relativity, detection of gravitational waves, …). One of the key components in an optical atomic clock is an ultra-frequency-stable laser source, which is used to determine precisely the frequency of the atomic transition. Whereas standard high-finesse Fabry-Perot cavities, acceptable for many applications, provide a fairly good fractional frequency instability at a low 10-16 level between 0.1 s and 10 s averaging time at their thermal Brownian noise limit, further improvements are needed to meet the stringent requirement of quantum projection noise in optical lattice clocks, expected to reach 10-17 or below at 1 s. Among various technologies explored, low-vibration pulse-tube cryostats have emerged to become a key enabling technology, permitting to cool down both monocrystalline silicon cavities and rare-earth ion doped crystals to desired working temperatures, ranging from 124 K down to 100 mK. Whereas the choice of all-electric dry cryostats is motivated by the possibility of continuous operation without periodic cryogen refill, the vibration generated by the pulse-tube must be properly managed.

Project

Various experimental means have been developed in the frequency metrology community to quantify the vibration level of the cryostats, using commercial mechanical sensors (accelerometers and seismometers), measuring the acceleration or the velocity in the inertial reference frame, and using optical interferometers to measure the position with respect to a reference plane. However, most mechanical sensors are cryoincompatible, limiting the accessible information. The optical interferometer, on the other hand, gives directly the information at the position of the object being cooled down, but it is difficult to access information at intermediate positions which are often not equipped with optical access. A possibility to complement such effort in characterization of vibrational properties of a cryo-cooled object is to numerically simulate the mechanical properties of the cryostat, using a staged approach. The mechanical transfer function can be obtained by finite-element simulations once the architecture as well as material properties are known. Since there are different stages of thermal isolation, which is critical to the normal function of the cryostat, it is natural to break down the overall mechanical transfer function into that of each thermal isolation stage, reducing the complexity of the simulation.

The purpose of this internship is twofold. The candidate will first identify appropriate numerical tools and carry out simulations of various stages of thermal isolation to evaluate their mechanical transfer function. It is also necessary to identify potential resonances within the relevant frequency band that may strongly impact the final spectroscopy experiment. He/she will then compare with accelerometric measurements and possibly carry out new measurements at critical positions to feed the comparison process. Structural improvement could be identified in order to reduce the vibration level of the sample holder.

Scope

The successful applicant will carry out the activities described above, while interacting with the rest of the team working on the experiment of rare-earth spectroscopy for laser frequency stabilization. The internship should span 2 months or more (duration negotiable). The start date is flexible.

The applicant

Serious, motivated and professional, with a training in mechanical engineering. Some experience in vibration analysis and thermal analysis is useful, but not a strict requirement. Given the collaborative nature and international context of the overall research project, communication in English must be practiced.

Application

Interested candidates should send a CV and a motivation letter to: Dr. Bess Fang-Sortais : bess.fang@obspm.fr. Interviews will be arranged once the documents are examined.

24/03/2026

News > Job > Offre de stage
Advanced spectroscopy of thulium-doped crystals for analog processing of broadband signals

Laboratory : Institut Langevin
Place : 1 rue Jussieu, Paris
Manager : Anne Louchet-Chauvet
Offer

Context

The Langevin Institute is developing advanced applications in analog broadband signal processing, utilizing light-matter interactions in crystals doped with thulium ions (Tm³⁺). These crystals, cooled to low temperatures (around 3K), must meet stringent specifications, in which the linewidth of the optical lines, the lifetime of the populations, and the decoherence induced by the excitation of the ions themselves must remain within very precise limits.

To date, YAG (Y₃Al₅O₁₂) has been the preferred host matrix, enabling, in particular, the development of an industrial demonstrator in partnership with Thales Research & Technology. However, the limitations of commercial cryogenic solutions (vibrations, cooling capacity) degrade the crystals’ nominal properties, particularly during the large-scale preparation of ions. This directly impacts the efficiency and dynamics of signal processing.

Objectives

The objective of this internship is to explore new crystal matrices (e.g., YGG, co-doped crystals, molecular crystals, waveguides) to identify alternatives to YAG that are capable, for example, of:

  • Increasing the lifetime of populations at a given temperature (reducing the required laser power, which leads to a reduced thermal load),
  • Attenuate vibration propagation (softer materials, allowing for improved vibrational isolation),
  • Guide light in such a way as to effectively lengthen the optical path within the sample, while maintaining optimal light-matter interaction. This approach would allow work at lower ionic concentrations, thereby limiting excitation-induced decoherence.

The intern will perform advanced spectroscopic measurements in the laboratory (photon echo, spectral hole burning, etc.). These techniques will enable the precise characterization of crystal properties: optical absorption, the lifetime of populations, as well as decoherence mechanisms, using experimental optical techniques (tunable lasers, ultra-sensitive detectors, laboratory cryogenics).

Profile

This internship is particularly suited to students seeking to acquire practical skills in experimental optics and advanced spectroscopy, within a context that is both fundamental and applied. The targeted applications, such as quantum memories or broadband atomic processors, provide a stimulating and concrete context. By actively participating in these experiments, the intern will gain valuable and versatile experience at the heart of a dynamic research project conducted in collaboration with an industrial partner.

Desired profile: Master’s 1 or 2 student, or engineering school student with a specialization in optics or physics. A passion for experimental work is essential. Knowledge of lasers and/or light-matter interactions is appreciated to confidently tackle the project’s technical challenges.

CONTACT: anne.louchet-chauvet@espci.fr

04/03/2026

News > Job > Offre d'emploi permanent
Research engineer specializing in nano and macro-manufacturing

Laboratory : Laboratoire Kastler Brossel
Place : Jussieu, Paris 5e
Wage : 3237€
Offer

Missions

The Kastler Brossel Laboratory is looking to recruit a research engineer specializing in nano and microfabrication to lead projects involving the design, manufacture, and characterization of original devices at the micro- and nanometric scale. Working closely with several teams within the laboratory and in coordination with the various clean rooms in the Paris region to which the laboratory has regular access, the engineer will play a central role in developing processes tailored to scientific needs, structuring expertise, and enhancing the laboratory’s skills in the field of quantum technologies.

Activity

The engineer will join a high-level research environment within the laboratory’s “Quantum Information and Optics” division and will be involved in all stages of experimental device development, from design to implementation in the clean room.

  • Design, manufacture, and characterize complex devices based on nano- or micro-manufacturing processes in clean rooms; develop new devices, from the substrate to the complete packaging.
  • Study scientific needs, propose solutions, and develop new manufacturing and characterization processes.
  • Negotiate functional specifications and draft technical specifications.
  • Organize the monitoring of the project’s progress, validate and qualify the device at its various stages.
  • Manage all technical and financial resources allocated to projects, including orders and the storage of consumables.
  • Ensure access to and coordination with clean rooms in Paris and the Paris region; liaise with the various clean room managers.
  • Keep up to date and receive training as necessary on the equipment used in clean rooms.
  • Monitor technological developments; maintain and enhance in-house design/simulation software.
  • Present, disseminate, and promote achievements.
  • Participate in promotion projects involving nano- or micro-manufacturing.
  • Advise, train, and inform researchers working in clean rooms on the principles and implementation of manufacturing and characterization processes; ensure safety and compliance with rigorous scientific methods.

Profile

Expertise:

  • Techniques in the field of nano and micro-manufacturing: laser and electron lithography (20 keV and 100 keV), plasma etching (RIE, ICP-RIE), FIB… (in-depth knowledge).
  • Engineering techniques and sciences (optics, microwaves, electronics, programming, mechanics, chemistry) (general knowledge).
  • General physics and physics in the relevant field (radiation, matter, thermodynamics, etc.) (general knowledge).
  • Environment and professional networks (general knowledge).
  • Written and oral presentation techniques.
  • English language: B1 to B2 (Common European Framework of Reference for Languages).

Skills:

  • Combine a set of elements from different technological fields.
  • Manage a project.
  • Use field-specific software.
  • Lead a meeting.
  • Conduct negotiations.
  • Apply quality assurance procedures.
  • Apply health and safety rules.
  • Manage a budget.
  • Apply public procurement regulations.
  • Monitor technological developments.

Environment

The Kastler Brossel Laboratory (LKB) is a joint research unit of the French National Center for Scientific Research (CNRS), the École Normale Supérieure (ENS), Sorbonne University (SU), and the Collège de France. Internationally renowned in the field of quantum physics, it comprises 11 research teams and several administrative and technical departments, involving nearly 200 people. The laboratory is spread across three sites in Paris (ENS, SU, and Collège de France), but the position will be based at Sorbonne University (SU).
The position is part of the “Quantum Information and Optics” research area, which brings together several teams developing original experimental devices requiring advanced micro- and nanofabrication processes. These devices include superconducting circuits, optomechanical resonators, optical nanoguides, and hybrid photonic structures.

The engineer recruited will play a central role in structuring this cross-disciplinary activity within the laboratory. He or she will ensure technical coordination with the various clean rooms in the Paris region (mainly ENS, INSP, Paris Cité, but also Collège de France, CEA, LPS Orsay, etc.), participate in the pooling and documentation of processes, contribute to user training, and ensure the continuity of know-how between generations of doctoral and post-doctoral students.

The position is part of a drive to enhance the LKB’s manufacturing capabilities, already supported by significant investments in shared equipment, and will enable the laboratory to play a full role in the ongoing developments in the field of quantum technologies.

23/02/2026

News > Job > Offre de stage
Circuit engineering and thermodynamics characterization of correlated quantum states

Laboratory : C2N
Place : 10 Bd Thomas Gobert, Palaiseau
Manager : Frédéric Pierre
Offer

Internship

Students will become familiar with various ultra-sensitive measurement techniques (conductance and electrical fluctuations, thermodynamic probes, including entropy), cryogenic techniques for temperatures in the millikelvin range, electron beam nanofabrication in the exceptional facilities of the C2N, and advanced quantum mechanics. The student’s work will encompass all aspects of the project, including theoretical analysis and modeling.

16/02/2026

News > Job > Offre de stage
Quantum superpositions of graphs and causal unitary evolutions

Laboratory : Inria Saclay
Place : Gif-sur-Yvette
Manager : Pablo Arrighi : pablo.arrighi@inria.fr
Offer

Context

In classical Computer Science many composite systems are modelled by dynamical networks, for instance computer processes, neurons, biochemical agents, particle systems, market agents and social network users. This because those systems, e.g. social networks agents, have the capabilities to spawn, disappear, connect and disconnect. Whilst standard quantum theory focusses on the quantisation of the individual systems within networks, a recently developed quantum networks theory seeks to quantise all features of dynamical networks—including their connectivity and population.

Resume

The Master 2 student will conduct theoretical research on quantum superpositions of graphs and causal unitary operators that evolve such superpositions without information traveling too fast, i.e., while respecting graph distance.

Publication

Read more

05/02/2026

News > Job > Offre de stage
Introduction to optical characterization of quantum nanodiamonds

Laboratory : Institut de Recherche de Chimie Paris
Place : Chimie ParisTech, CNRS, PSL Université, Paris 5è
Manager : Mary De Feudis; mary.de-feudis@cyu.fr
Offer

Context

This short-term internship aims to introduce the student to the field of quantum nanodiamonds and to the main optical characterization techniques used in physics and materials science. It is carried out within the framework of the NanoG4V project (PI M. De Feudis), funded by the French National Research Agency (ANR), which aims to produce a new generation of high-quality, quantum-grade nanodiamonds for a wide range of applications, such as extreme-condition sensing, nanoscale thermometry, and live-cell dual-color imaging. The student will join the CQSD group of the MPOE team at the IRCP Institute.

Internship

The student will be trained in the study of nanodiamond samples using Raman spectroscopy and photoluminescence (PL) at room temperature, employing different laser wavelengths (green, red, blue). The measurements will allow the identification of diamond and graphite phases, as well as different color centers, such as silicon-vacancy (SiV) and nitrogenvacancy (NV) centers, and the understanding of their spectroscopic signatures. The internship will include a strong experimental component: sample preparation and handling, hands-on use of a Raman/PL spectrometer (Renishaw software), understanding of the general operation of the instrumentation and its electronics. Particular attention will be devoted to data processing and analysis. The student will learn how to exploit experimental results using scientific
software (Origin, etc.) to produce high-quality graphs, perform mathematical fitting procedures, and generate 3D representations. An introduction to data structuring and compatibility between different file formats (e.g. between Python and Origin) will also be provided. The internship will be supervised by the Ass. Prof. Mary De Feudis (project leader) and a PhD student, within an active and stimulating international research environment.

Perspectives

For interested students, this internship may lead to higher-level internships, including the processing of data obtained at the SOLEIL synchrotron (tomography, radiography, X-ray diffraction).

03/02/2026

News > Job > Offre de stage
Electro-optic response in layeredin-plane-polarized ferroelectric thin films

Laboratory : Laboratoire Albert Fert
Place : 1 avenue Augustin-Fresnel, 91767 Palaiseau, France
Manager : Elzbieta Gradauskaite, elzbieta.gradauskaite@cnrs-thales.fr
Offer

Scientific Context

Layered Carpy-Galy oxides (general formula AₙBₙO₃ₙ₊₂, e.g. La2Ti2O7) are a versatile family of ferroelectric materials consisting of perovskite blocks separated by additional oxygen planes. Their uniaxial in-plane polarization, arising from cooperative oxygen octahedral rotations, makes them fundamentally different from conventional ferroelectric perovskites and potentially valuable for electro-optic applications (e.g. photonic integrated circuits). In our laboratory, through epitaxy we stabilized high-quality, single-crystalline thin films of these compounds, with nearly fourfold increase in ferroelectric polarization [1]. This opens the way to investigate their electro-optic properties, in particular, the Pockels effect, which describes the linear modulation of refractive index of a material under an applied electric field. Studying this effect in layered ferroelectrics will provide insight into how their uniaxial in-plane polarization influence electro-optic coefficients, thus evaluating their potential for compact on-chip electro-optic
modulators [2].

Work program & skills acquired during internship

During the internship, the student will learn the basics of thin-film structural characterization (X-ray diffraction, atomic force microscopy) to determine film orientation and quality; perform ellipsometry measurementsto extract the refractive indices and assess the material’s birefringence; set up and carry out electro-optic coefficient measurements using a laser, Soleil-Babinet compensator, polarizer, and photodiode combined with lock-in amplifier detection [3] to quantify the effective electro-optic coefficients; compare results with theoretical predictions/canonical ferroelectric materials and uncover how the anisotropic layered structure and uniaxial in plane polarization affect electro-optic properties.
The project will primarily focus on thin-film optical characterization and data interpretation, with a brief
introduction to material properties. The knowledge in optical measurements (ellipsometry, birefringence, etc.) is a plus.

  1. Gradauskaite, E. et al. Adv. Mater. 37 (12), 2416963 (2025).
  2. Abel, S. et al. Nat. Mater. 18, 42 (2019).
  3. Sando, D. et al. Phys. Rev. B 89, 195106 (2014).

Work environment

You will be working under the supervision of: Elzbieta Gradauskaite (elzbieta.gradauskaite@cnrs-thales.fr , CNRS), Manuel Bibes (CNRS), Jérôme Bourderionnet (Thales), Gilles Feugnet (Thales).

03/02/2026

News > Job > Offre de stage
Dynamic strain engineering of the metal-insulatortransition in nickelates for thermo-optical applications

Laboratory : Laboratoire Albert Fert
Place : 1 avenue Augustin-Fresnel, 91767 Palaiseau, France
Manager : Lucia Iglesias, lucia.iglesias@cnrs-thales.fr
Offer

Scientific Context

Rare-earth perovskite nickelates (RNiO₃, with R a rareearth element) are correlated oxides that exhibit sharp, tuneable metal–insulator transitions (MITs). Their electronic properties are highly sensitive to lattice distortions and strain (Fig. 1), making them excellent model systems for studying structure–property coupling in quantum materials. Our group has demonstrated that the MIT in nickelate thin films can be shifted toward room temperature by mixing Sm and Nd in controlled ratios, opening opportunities for
device-oriented applications. Building on this progress, the proposed project aims to achieve active and reversible control of the transition through strain engineering. Epitaxial films will be grown on piezoelectric substrates (BaTiO₃ or PMN-PT), where an applied gate voltage dynamically modulates the biaxial strain and, consequently, the MIT. The resulting strain-driven tuning will be explored through
transport and infrared optical measurements to realize dynamically tuneable properties relevant for thermo-optical applications.

Work program & skills acquired during internship

The student will grow and optimize nickelatesthin films of selected compositions using Pulsed Laser
Deposition (PLD) technique on piezo electric substrates. He/she will also perform a complete structural
characterization of the thin films through X-Ray reflectivity (XRR), X-Ray diffraction (XRD), Reciprocal
Space Map technique (RSM) and Atomic Force Microscopy (AFM). Resistivity measurements as a
function of the temperature and gate voltage will determine the influence of strain on the metal-insulator
transition, while optical characterization, including thermal reflectance, emissivity measurements and
ellipsometry, will assess the strain-dependent infrared behaviour. Experience with electrical transport
and optical characterization techniques will be considered an asset, along with strong experimental
skills, data analysis capabilities, and the ability to work effectively in an interdisciplinary environment
bridging academic research and industrial innovation.

Work environment

You will be working under the supervision of: Lucia Iglesias (CNRS) and Julian Peiro (Thales) at
Laboratoire Albert Fert located in Thales Research and Technology building on the Paris-Saclay campus.

03/02/2026

News > Job > Offre de stage
Ferroelectric-metallic BaTiO3 thin films grown by hybrid MBE for non-volatile field-effect devices

Laboratory : Laboratoire Albert Fert - Centre de Nanosciences et de Nanotechnologies
Place : 1 avenue Augustin-Fresnel, 91767 Palaiseau, France
Manager : Manuel BIBES, manuel.bibes@cnrs-thales.fr
Offer

Scientific Context

Ferroelectrics are polar materials whose switchable polarization can be used to store non-volatile information. Among them, BaTiO₃ (BTO) stands out for its low-voltage switching and high endurance in thin-film form. Remarkably, BTO can also become conducting when doped with electrons, leading to a rare coexistence of ferroelectricity and metallicity. This unconventional combination raises key questions: how do structural distortions, carrier density, and electrostatic screening interact at the nanoscale? How does this balance evolve with film thickness, doping level, or epitaxial strain? Beyond fundamental interest, creating a 2D conducting channel – either a two-dimensional electron gas (2DEG) or a lightly
doped polar metal – within the same ferroelectric matrix offers a new route to mitigate interface defects that limit the performance of ferroelectric field-effect transistors (FeFETs).

Work program & skills acquired during internship

The goal of the internship is to grow epitaxial BaTiO3 films by hybrid molecular beam epitaxy (MBE), a technique enabling atomic-scale control and the highest material quality. The intern will:

  • Learn and assist in the operation of the hybrid-MBE system to deposit BTO and SrRuO3 bottom electrodes;
  • Characterize films using X-ray diffraction, atomic-force microscopy, pizeoresponse-force microscopy and electrical measurements;
  • Generate and study ultrathin conducting layers in BTO, either by controlled La doping or by inducing a 2DEG at the surface;
  • Fabricate SRO/BTO/SRO capacitors and measure ferroelectric properties (switching voltage, endurance, retention);
  • Use conducting BTO layers as channels for FeFETs, and analyze their transport characteristics.

This internship will provide strong hands-on experience in thin-film growth, advanced characterization, and device physics. Depending on progress, it can be extended into a PhD thesis focusing on the physics and applications of ferroelectric-metallic oxides.

Work environment

You will work at C2N with Thomas Maroutian for film growth, and at the Laboratoire Albert Fert with Manuel Bibes for ferroelectric characterization and device studies.