Quantum Photonics Engineer - quantum frequency conversion

About the role

Qunett is seeking a Photonics Engineer to contribute to the photonics team building entangled photon sources and quantum frequency conversion systems. This role is highly hands-on, focused on designing, assembling, and characterizing low-noise, phase-coherent, quantum frequency conversion modules for qubit exchange between telecom and visible wavelengths. Efficient methods of bandwidth exchange between broadband photons from SPDC and narrowband light appropriate for color-center qubits will be essential. Free-space implementation and/or integrated photonics approaches are envisioned. This role will focus on nonlinear optics and quantum frequency conversion within the broader photonics efforts at Qunett.

Required qualifications

• PhD in Physics, Optics, Electrical Engineering, or related field (or MS with equivalent experience)
• Hands-on experience with nonlinear optics and/or quantum optics in laboratory settings
• Extensive experience working with spectroscopic-grade laser systems (alignment, safety, modulation, stabilization fundamentals)
• Experience building and troubleshooting optical setups: free-space and fiber coupling, ABCD matrix analysis and implementation, beam shaping, polarization management, interferometers, and low-noise detection
• Exposure to single-photon sources and/or single-photon detectors (e.g., SNSPDs/APDs), timing electronics, and basic coincidence measurements
• Experience using optical design / engineering tools (e.g., Zemax/OpticStudio or equivalent) to design, tolerance, and iterate optical layouts
• Familiarity with modern software/AI-assisted tools for coding, optimization, and experiment control (e.g., Python-based analysis and automation)

Preferred qualifications

• Experience with SPDC-based entangled photon sources (Sagnac or interferometric geometries), biphoton characterization, and/or HOM-type interference measurements
• Experience with wavelength-division multiplexing concepts (filters, DWDM components), insertion-loss management, and polarization gates
• Experience with laser spectroscopy in solid-state, atomic, or ion systems
• Exposure to micro/nanofabrication or photonic device integration
• Familiarity with quantum networking requirements (entanglement distribution, link budgets, interface constraints)

Benefits

• Comprehensive health coverage including medical, dental, vision, and prescription plans
• 401(k) retirement plan
• Equity participation through stock options for all new hires
• Flexible time off: unlimited PTO, sick leave, and 11 paid holidays
• Employee support benefits including EAP, caregiver support, healthcare advocacy, and more