Postdoc position: Thin-film UVC light-emitters

As the successful candidate you will play an essential role in the development of thin-film UVC light-emitters, including both thin-film flip chip LEDs and VCSELs. These devices have potential applications in disinfection of air, surfaces and liquids to combat future pandemics and for water purification systems, in medical analysis and treatment, in UV curing etc. You will be given the opportunity to work in one of the world-leading groups in the area and combine device design and numerical simulations with device processing and characterization in close collaboration with other Universities who are experts on epitaxial growth.

Information about the division
The Photonics Laboratory at the Department of Microtechnology and Nanoscience (MC2), with about 35 researchers, is working on optoelectronics, ultrafast optics and fiber optical communication. We have a strong research focus on blue and ultraviolet emitting vertical-cavity surface-emitting lasers (VCSELs), where we have the expertise and infrastructure that covers most parts in VCSEL development, i.e. design and simulation, laser fabrication, and material/device characterization. More recently we have expanded our research to also include thin-film flip-chip light emitting diodes (LEDs) and other types of surface-emitting lasers. We have developed a unique thin-film lift-off process for AlGaN-materials based on electrochemical etching. This has enabled us to demonstrate thin-film flip-chip UVB LEDs and the shortest emission wavelength at the time from an optically pumped VCSEL at 310 nm, the latter by combining an AlGaN-cavity with high-quality dielectric mirrors. We are now expanding our team to realize UVC light-emitters based on our thin-film technology, including both thin-film flip-chip LEDs and VCSELs.

Major responsibilities
In our team your main responsibility will be to demonstrate UVC VCSELs and thin-film flip-chip LEDs, which requires pushing the limits in electrochemical etching. Your work will have a focus on process development and device fabrication using state-of-the-art equipment in our clean room as well as device characterization in our new measurement laboratory. In addition, you will have access to our in-house-developed VCSEL simulation tools for laser design and modeling. The work will be conducted in close collaboration with external partners who develop and grow the epitaxial material.

Qualifications
By the starting date in Feb. - Aug. 2022, you must have a PhD degree, with knowledge in semiconductor device processing and characterization, preferably of devices in III-nitride-materials. Hands-on experience from electrochemical or photoelectrochemical etching of III-nitrides will be a strong merit. Knowledge of device simulations or epitaxial growth of III-nitrides is also regarded as an asset. Important personal qualities are enthusiasm, ability to drive and conclude projects independently, creativity and problem-solving ability. Good cooperation and social abilities are also appreciated. Excellent communication skills in spoken and written English are necessary. 

Contract terms
Full-time temporary employment. The position is limited to a maximum of two years (1+1).

We offer
Chalmers offers a cultivating and inspiring working environment in the coastal city of Gothenburg. 
Read more about working at Chalmers and our benefits for employees.

Chalmers aims to actively improve our gender balance. We work broadly with equality projects, for example the GENIE Initiative on gender equality for excellence. Equality and diversity are substantial foundations in all activities at Chalmers.

Application procedure
The application should be marked with Ref 20210575 and written in English. The application should be sent electronically and be attached as pdf-files, as below:

CV: (Please name the document as: CV, Surname, Ref. number) including:
• CV, include complete list of publications
• Previous teaching and pedagogical experiences
• Two references that we can contact.

Personal letter: (Please name the document as: Personal letter, Family name, Ref. number)
1-3 pages where you:
• Introduce yourself
• Describe your previous research fields and main research results
• Describe your future goals and future research focus

Other documents:
• Attested copies of completed education, grades and other certificates.

Please use the button at the foot of the page to reach the application form. The files may be compressed (zipped).

Application deadline: 9 January, 2022

For questions, please contact:
Professor Åsa Haglund, Photonics Laboratory
E-mail: asa.haglund@chalmers.se
Phone: +46(0)31-772 1592

*** Chalmers declines to consider all offers of further announcement publishing or other types of support for the recruiting process in connection with this position. *** 
   



Chalmers University of Technology conducts research and education in engineering sciences, architecture, technology-related mathematical sciences, natural and nautical sciences, working in close collaboration with industry and society. The strategy for scientific excellence focuses on our six Areas of Advance; Energy, Health Engineering, Information and Communication Technology, Materials Science, Production and Transport. The aim is to make an active contribution to a sustainable future using the basic sciences as a foundation and innovation and entrepreneurship as the central driving forces. Chalmers has around 11,000 students and 3,000 employees. New knowledge and improved technology have characterised Chalmers since its foundation in 1829, completely in accordance with the will of William Chalmers and his motto: Avancez!