Development of high carrier mobility polycrystalline Ge/SiGe for photonic waveguide photodetectors

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Take part in the development of next generation integrated photonic sensors

Development of high carrier mobility polycrystalline Ge/SiGe for photonic waveguide photodetectors


Abstract. Integrated photonics is an emerging field gathering a serious attention from academy and industry. Fundamental benefits of light over electrons open great opportunities to implement integrated photonics in cutting-edge applications. Photonic integrated circuit (PIC) technology inherited rich experience and fabrication facilities of microelectronic industry, so photonic chips are already commercially available as miniature sensors for autonomous cars, high-speed optical communication engines, advanced medical analysis and imaging platform, and many others. To enable on-chip light detection, we need to introduce low-cost high-performance Ge/SiGe photodetectors to our Si3N4 photonic platform.

The goal of this work is to develop polycrystalline Ge/SiGe thin film process conditions to obtain favorable optoelectronic properties for integrated waveguide photodiodes. Developed films will be introduced into imec's 200 mm and 300 mm wafer production lines. We appreciate candidates with interest in material science, passionate about optoelectronic microfabrication. We value theoretical background in solid state physics and hands-on experience with semiconductor material processing and characterization tools.


Expected duties:

20% literature review, 50% experimental work, 30% data analysis

  • Literature study, careful planning of experiments
  • Ge sample treatment in ovens, wet bench, other processing
  • Evaluation of material properties using XRD, Hall measurements, sheet resistance, ellipsometry, etc.
  • Data analysis and visualization using statistical software (JMP, Origin)


What we offer:

  • Work together with experienced specialists
  • Laboratories with state-of-the-art semiconductor equipment
  • Publication in IEEE, OSA journals
  • Thorough supervision and support​​

Type of project: Internship

Duration: 6 months

Required degree: Master of Engineering Technology, Master of Science, Master of Engineering Science

Required background: Materials Engineering, Nanoscience & Nanotechnology, Physics

Supervising scientist(s): For further information or for application, please contact: Aleksandrs Marinins (

Imec allowance will be provided.

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