Single-Photon Source Research Scientist H/F Quandela

Indicative salary range:
€57.5K gross - entry level (PhD + 1-2 years' experience; solid hands-on optics skills, Python proficiency, and strong documentation practice).
€60-65K gross - experienced level (PhD + 4-5 years' experience; leading experimental projects, coordinating peers, and contributing to roadmap definition).

Perks: annual profit-sharing - company savings plan - 100 % health coverage (Alan) - transport reimbursement or mobility bonus - Swile meal vouchers - Gymlib access.

And above all...

Quandela is where rigor meets vision; where experiments evolve into machines, and machines into breakthroughs.
We believe that diversity in experiences, perspectives, and backgrounds is key to innovation.
Our team grows through collaboration, inclusion, and respect: because the future of quantum computing will be built together.

If you're ready to make tomorrow's quantum computing possible - one pulse, one experiment, one idea at a time - in a pioneering deeptech environment, let's speak

What will you do?

Design and operate optical experiments:
- Build, align, and stabilize custom optical setups to study semiconductor quantum emitters (quantum dots, color centers, 2D materials) at cryogenic temperatures.
- Implement and characterize excitation sequences using picosecond lasers and programmable pulse-shaping modules.
- Quantify brightness, coherence, and excited-state dynamics; identify and address limiting factors in performance.

Develop and validate excitation schemes:
- Optimize optical excitation protocols to enhance brightness and indistinguishability.
- Validate and document experimental methods for integration into Quandela's single-photon source roadmap.
- Propose novel techniques compatible with cluster-state and spin-photon architectures.

Collaborate and share results:
- Work closely with colleagues from Semiconductor Optics, Cluster States, and Quantum Interconnects teams.
- Contribute to publications, internal documentation, and international conferences.
- Support the cross-functional transfer of research outcomes to production teams.

How You'll Grow:
0-3 months Take ownership of your optical bench, reproduce baseline experiments, implement first excitation tests.
3-6 months Deliver a validated proof-of-concept and reproducible procedures.
6-12 months Finalize optimized excitation schemes and co-author publications.

Beyond one year Grow into a Project Leader - Excitation Schemes, leading new developments across the Semiconductor Optics division.

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What We're Looking For?

Must-have:
- PhD (Optics, Photonics, or Semiconductor Physics) + hands-on experience in optical research labs - academic or industrial.
- Strong experimental skills: optical alignment, cryogenic setups, and system stabilization.
- Proficiency in laser spectroscopy, pulse shaping, and time-resolved measurements on quantum emitters.
- Python proficiency for experiment control, automation, and data analysis.
- Excellent communication and documentation skills in English (C1 level or above).

Important (can grow here):
- Experience with chirped-pulse or two-photon resonant spectroscopy techniques.
- Knowledge of cavity QED or photonic cavity design (for emitter-cavity optimization).

Bonus:
- Publication record in quantum optics or semiconductor physics journals.
- Experience in collaborative or multi-institutional R&D
- Basic French skills (for lab and administrative coordination).

Languages:
English C1 level required: international and multicultural team.