Niklas Rorsman

This fully funded PhD position at Chalmers University of Technology focuses on advanced characterization and modelling of GaN-based electronics for high frequency applications. The research is conducted within the Microwave Electronics Laboratory (MEL) at the Department of Microtechnology and Nanoscience, a world-class facility specializing in high speed electronic devices, circuits, and systems for communication and sensing applications ranging from 1 GHz to 500 GHz. The laboratory is equipped with state-of-the-art millimeter wave measurement tools and a cleanroom facility, supporting cutting-edge research in semiconductor materials and devices. The project centers on III-nitride semiconductor devices, particularly high electron mobility transistors (HEMTs), targeting applications in wireless communication and radar systems. The research aims to push the boundaries of device performance by exploring new concepts in material processing, epitaxial design, and device fabrication. Key activities include defining and designing non-linear measurements, characterizing large-signal and trapping effects, and developing methodologies for extracting small- and large-signal models. The work is highly collaborative, involving both academic and industry partners, and offers opportunities to participate in the realization of complete wireless system demonstrators. As a doctoral student, you will take advanced courses within the Graduate School of Microtechnology and Nanoscience, develop your own scientific concepts, and communicate research results both verbally and in writing. The position includes teaching or other departmental duties up to 20% of working hours, potentially extending the appointment to five years. You will join a dynamic team of PhD students and senior researchers, contributing to semiconductor technology development, characterization, modelling, and circuit design. Applicants must hold a MSc degree in physics or electrical engineering (or equivalent), generally not older than two years, and demonstrate strong English communication skills. Enthusiasm, independence, creativity, and a problem-solving mindset are essential, along with excellent cooperation and social abilities. Experience in microwave measurements and semiconductor device characterization is advantageous. Physical presence is required throughout the study period, and a valid residence permit must be presented by the start date. The position offers a starting salary of 34,550 SEK per month (valid from May 25, 2025), full employee benefits, and access to Sweden’s generous social support systems. Chalmers is committed to gender equality and diversity, providing a supportive environment for all employees. Swedish language courses are available for non-native speakers. The application deadline is May 20, 2026. Applications must be submitted in English via the online application form, including CV, personal letter, motivation, thesis, and transcripts. Incomplete or emailed applications will not be considered. References will be requested after the interview. For further information, contact Research Professor Niklas Rorsman at [email protected].