"Postdoctoral Researcher in GaAs Photonic Integrated Circuits"

The Department of Electronics and Nanoengineering at Aalto University is now looking for a Postdoctoral Researcher in GaAs Photonic Integrated Circuits.

Are you passionate about semiconductor lasers and photonic integrated circuits (PICs), and are you also excited by the prospect of putting them on satellites? We are now looking for a highly motivated Postdoctoral Researcher to join our team in a project to develop GaAs-based PIC lidar for space applications through the EIC project SPIDAR. In this position you will have a chance to make an impact by contributing to satellite-based PIC LIDAR technology with direct applications in space debris detection.

This is an exciting opportunity to work on developing GaAs PICs in a project that includes everything from III-V laser epitaxy design and simulations, and fabrication, to system level PIC lidar tests and space qualification.

Your role and goals

You will take a leading role in developing GaAs PICs for satellite-based Lidar, combining both theoretical and experimental work. Your responsibilities would include some combination of the following, with flexibility depending on interests and experience:

• Design and simulation of III-V lasers and PIC architectures
• III-V (mainly GaAs) fabrication process development in the cleanroom
• Assemble and use custom test setups for testing fabricated devices
• Conduct independent research, analyze data, and publish results
• Present findings at local and international conferences
• Mentor graduate students and provide laboratory training
• Collaborate with space technology researchers on system integration and testing

Your network and team

You will work in the Integrated Photonics research group and collaborate closely with Aalto's Space Technology group on space qualification testing of semiconductor lasers and PICs. You will report to Professor Paul Verrinder and be part of a dynamic, international research environment.

Your experience and ambitions

Required Qualifications

• PhD in Electrical Engineering, Physics, Photonics, Materials Science, or related field
• Strong theoretical and practical background in semiconductor device physics and optoelectronics
• Demonstrated experience with design, fabrication, and/or characterization of III-V photonic devices, especially lasers
• Excellent written and verbal communication skills in English
• Ability to work independently and collaboratively in a research team

Preferred Qualifications

• III-V laser epitaxy design and simulation experience
• Experience with III-V semiconductor processing and cleanroom fabrication techniques
• Proficiency with photonic simulation tools (PhotonDesign, Lumerical, COMSOL, or similar)
• Experience with optical characterization techniques (spectrum analysis, power measurements, linewidth analysis)
• Knowledge of semiconductor laser physics (thermal effects, carrier dynamics)
• Experience with mask layout design
• Knowledge of LIDAR systems, especially FMCW LIDAR architectures
• Programming experience in MATLAB or Python for data analysis
• Hands-on experience building and optimizing test setups for photonic devices

We are looking for someone who is passionate about photonic technologies and excited about contributing to space applications research.

What we offer

• Research: Participate in development of GaAs PICs for satellite-based LIDAR with direct space applications through the EIC project SPIDAR
• World-Class Facilities: Access to state-of-the-art cleanroom facilities and characterization equipment in Micronova (https://www.aalto.fi/en/otanano/micronova)
• Interdisciplinary Collaboration: Collaborate with Aalto's Space Technology group on space qualification testing of semiconductor lasers and PICs
• Professional Growth: Conference attendance, international partnerships, and mentoring opportunities
• Work Environment: Competitive salary, beautiful Espoo campus, and outstanding work-life balance in Finland

Starting date as soon as possible, or as mutually agreed upon with the supervisor. The duration of the contract is for 24 months from the starting date. Salary is approx. 4100€/Month.

Our vast array of professional development opportunities means you will grow and learn, having the chance to participate actively in staff trainings and development projects based on your interests and needs. We work in a hybrid model, with the primary workplace located at the Otaniemi Campus in Espoo.

Join us!

To apply, please share the following application materials (as PDFs) with us through our recruitment site ("Apply now!"). Please note that our recruitment system allows max 5 attachments, so please combine the copies of certificates and transcripts in one PDF, if necessary.

• CV
• Motivation letter
• Doctoral degree certificate (or information about defence, if defending soon)

Please apply as soon as possible, at the latest October 31st, 2025. We’ll review applications as they arrive and will hire the right candidate as soon as we find them, possibly already during the application period.

For more information about the role, please contact Professor Paul Verrinder by email at paul.verrinder@aalto.fi. Additional information in recruitment process related questions, please contact HR Advisor Monika Mäkinen, hr-elec@aalto.fi.