III-V Active Photonic Device Expert

Organisation/Company IMEC Research Field Engineering » Other Researcher Profile Other Profession Positions Other Positions Application Deadline 17 Nov 2026 - 14:26 (Europe/Brussels) Country Belgium Type of Contract Permanent Job Status Full-time Is the job funded through the EU Research Framework Programme? Not funded by a EU programme Is the Job related to staff position within a Research Infrastructure? No

Offer Description

Ready to turn quantum-engineered materials into scalable photonic devices? Join imec and help define the next generation of waveguide-integrated III-V modulators.

At imec, we develop advanced integrated-photonics technologies for next-generation optical interconnects, computing, communications and sensing. We are looking for an R&D Engineer to strengthen our work on waveguide-integrated III-V active photonic devices.

Your primary focus will be the simulation-driven design and experimental validation of III-V modulators integrated with silicon-photonics platforms, particularly quantum-confined Stark effect (QCSE) electro-absorption modulators based on multi-quantum-well heterostructures. Depending on project needs and your expertise, you may also contribute to MOSCAP/SISCAP concepts, photodetectors and other emerging III-V active-device architectures.

This role combines semiconductor physics, quantum-engineered heterostructure design, photonic modelling, high-speed device engineering, fabrication-aware optimisation and experimental validation.

The final level and scope of the role will be determined based on the successful candidate's background and expertise and may range from R&D Engineer to Principal Member of Technical Staff.

What you will do

• Design and optimise waveguide-integrated III-V active photonic devices, primarily high-speed electro-absorption modulators.
• Engineer multi-quantum-well heterostructures for target wavelength, optical loss, voltage and speed.
• Model band structure, QCSE, carrier transport, optical absorption and electric-field distribution.
• Develop complete electro-optical device models, including geometry, capacitance, resistance and high-speed response.
• Design III-V integration with silicon or silicon-nitride waveguides and optimise coupling and transitions.
• Incorporate epitaxial, process, thermal and manufacturing constraints into robust device designs.
• Translate concepts into layouts and test structures, then correlate simulations with electrical, optical and RF measurements.
• Collaborate across epitaxy, integration, process, characterisation, circuits and systems, and contribute to roadmaps, IP and publications.
• PhD in electrical engineering, photonics, applied physics, semiconductor physics, materials science or a closely related discipline.
• Prior hands‑on experience of at least 3 years with III‑V photonic devices is essential.
• Experience with waveguide-integrated III‑V modulators or photodetectors on silicon‑photonics platforms is highly valued.
• Strong understanding of semiconductor physics, quantum mechanics, heterostructure band engineering and optoelectronic‑device operation, with practical experience in multi‑quantum‑well structures, electro‑absorption, QCSE, carrier transport or related III‑V device physics.
• Ability to translate material and active‑region properties into complete electrical and photonic device designs and to critically interpret simulation outputs.
• Experience with relevant band‑structure, TCAD, multiphysics or optical simulation tools, such as Nextnano, Synopsys Sentaurus, Silvaco Atlas, Ansys Lumerical or COMSOL.
• Scientific programming capability in Python or an equivalent environment, including automation, optimisation, parameter sweeps or data analysis.
• Ability to collaborate effectively across modelling, epitaxy, process, design and characterization disciplines, supported by clear technical communication and documentation skills.
• You either live in Belgium or are willing and able to relocate (relocation and immigration support is provided by imec).

Languages ENGLISH Level Excellent

Additional Information

What we do for you

We offer you the opportunity to join one of the world’s premier research centers in nanotechnology at its headquarters in Leuven, Belgium and work on advanced integrated-photonics technologies within a multidisciplinary semiconductor R&D environment. With your talent, passion and expertise, you’ll become part of a team that makes the impossible possible. Together, we shape the technology that will define the society of tomorrow. You will have access to silicon-photonics, III‑V integration, epitaxy, fabrication and advanced characterization capabilities. You will collaborate with experts across materials, devices, circuits, systems and manufacturing. You will have the opportunity t