Publicerad: 2025-04-25
Postdoc positions in III-nitride Photonic-crystal surface-emitting lasers
As the successful candidate you will play an essential role in the development of blue or UV PCSELs. These devices have potential applications in lithography, disinfection, underwater communication, medical analysis and treatment, material processing, etc. You will be given the opportunity to work in one of the world-leading groups in the area and combine device characterization with simulations or device fabrication, in close collaboration with other partners who are experts on epitaxial growth.
About us and the research project
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. A strong research focus is on ultraviolet (UV) and blue surface-emitting devices, such as vertical-cavity surface-emitting lasers (VCSELs), photonic-crystal surface emitting lasers (PCSELs), light-emitting diodes (LEDs), and resonant-cavity LEDs (RCLEDs). Our expertise is in device design and simulation, laser fabrication, and material and device characterization. We have developed a novel thin-film lift-off process for AlGaN-materials based on electrochemical etching, which allows integration of III-nitride thin films with various photonic structures, such as dielectric cavities with improved quality factor. These have enabled us to demonstrate the world's first blue VCSEL with a high-contrast grating for polarization pinning, thin-film flip-chip UVB LEDs and optically pumped VCSELs at 310 and 275 nm. We recently also have demonstrated the first optically pumped UV-B and UV-C PCSELs. We are now looking to expand our team with two postdocs: one to work on blue PCSELs and one on UV PCSELs.
We seek candidates with the following qualifications
By the starting date in August - October 2025, you must have a PhD degree, with knowledge in semiconductor device simulations, fabrication, or characterization, preferably involving III-nitride-materials. Hands-on experience in (photo)electrochemical etching of III-nitrides will be a strong merit. Knowledge about 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.
To qualify for the position of postdoc, you must hold a doctoral degree awarded no more than three years prior to the application deadline.
The position requires sound verbal and written communication skills in English. Swedish is not a requirement but Chalmers offers Swedish courses.
You are expected to be somewhat accustomed to teaching, and to demonstrate good potential within research and education.
* The date shown in your doctoral degree certificate is the date we use, as this is the date you have met all requirements for the doctoral degree. Exceptions from the 3-year limit can be made for longer periods resulting from parental leave, sick leave or military service.
What you will do
We are looking for two postdocs who would be interested in simulation, fabrication and characterization of III-nitride PCSELs, using state-of-the-art equipment in our clean room and characterization lab. The work will be conducted in close collaboration with external partners who develop and grow the epitaxial material. In these positions, teaching is not required. The contract is a full-time temporary employment of 1 + 1 year.
Your major responsibility as postdoc is to perform your own research in a research group. Another important aspect involves collaboration within academia and with society at large. The position is meritorious for future research duties within academia as well as industry/the public sector.
What we offer
Chalmers provides 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.
If Swedish is not your native language, Chalmers offers Swedish courses to help you settle in.
Contract terms
This postdoc position is a full-time temporary employment for two years.
Application Procedure
Please submit your application in English as PDF files according to the instructions below. Each file should not exceed 40 MB. Note: The system does not support Zip files.
1. CV
Name the document as: CV, [Your Surname]. Include the following:
• A comprehensive CV, including a complete list of publications.
• Details of previous teaching and pedagogical experience.
• Contact information for two references.
2. Personal Letter
Name the document as: Personal Letter, [Your Surname]. Limit the letter to 1–3 pages and include:
• A brief introduction about yourself.
• A summary of your previous research fields and key research outcomes.
• An outline of your future goals and research focus.
Use the button at the foot of the page to reach the application form.
Please note: The applicant is responsible for ensuring that the application is complete. Incomplete applications and applications sent by email will not be considered.
Application deadline: May 25, 2025
For questions please contact:
Professor Åsa Haglund, Photonics Laboratory
E-mail: asa.haglund@chalmers.se
Tel:+46(0)31-772 1592
We look forward to your application!
*** 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 in Gothenburg conducts research and education in technology and natural sciences at a high international level. The university has 3100 employees and 10,000 students, and offers education in engineering, science, shipping and architecture. With scientific excellence as a basis, Chalmers promotes knowledge and technical solutions for a sustainable world. Through global commitment and entrepreneurship, we foster an innovative spirit, in close collaboration with wider society.
Chalmers was founded in 1829 and has the same motto today as it did then: Avancez – forward.
About us and the research project
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. A strong research focus is on ultraviolet (UV) and blue surface-emitting devices, such as vertical-cavity surface-emitting lasers (VCSELs), photonic-crystal surface emitting lasers (PCSELs), light-emitting diodes (LEDs), and resonant-cavity LEDs (RCLEDs). Our expertise is in device design and simulation, laser fabrication, and material and device characterization. We have developed a novel thin-film lift-off process for AlGaN-materials based on electrochemical etching, which allows integration of III-nitride thin films with various photonic structures, such as dielectric cavities with improved quality factor. These have enabled us to demonstrate the world's first blue VCSEL with a high-contrast grating for polarization pinning, thin-film flip-chip UVB LEDs and optically pumped VCSELs at 310 and 275 nm. We recently also have demonstrated the first optically pumped UV-B and UV-C PCSELs. We are now looking to expand our team with two postdocs: one to work on blue PCSELs and one on UV PCSELs.
We seek candidates with the following qualifications
By the starting date in August - October 2025, you must have a PhD degree, with knowledge in semiconductor device simulations, fabrication, or characterization, preferably involving III-nitride-materials. Hands-on experience in (photo)electrochemical etching of III-nitrides will be a strong merit. Knowledge about 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.
To qualify for the position of postdoc, you must hold a doctoral degree awarded no more than three years prior to the application deadline.
The position requires sound verbal and written communication skills in English. Swedish is not a requirement but Chalmers offers Swedish courses.
You are expected to be somewhat accustomed to teaching, and to demonstrate good potential within research and education.
* The date shown in your doctoral degree certificate is the date we use, as this is the date you have met all requirements for the doctoral degree. Exceptions from the 3-year limit can be made for longer periods resulting from parental leave, sick leave or military service.
What you will do
We are looking for two postdocs who would be interested in simulation, fabrication and characterization of III-nitride PCSELs, using state-of-the-art equipment in our clean room and characterization lab. The work will be conducted in close collaboration with external partners who develop and grow the epitaxial material. In these positions, teaching is not required. The contract is a full-time temporary employment of 1 + 1 year.
Your major responsibility as postdoc is to perform your own research in a research group. Another important aspect involves collaboration within academia and with society at large. The position is meritorious for future research duties within academia as well as industry/the public sector.
What we offer
Chalmers provides 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.
If Swedish is not your native language, Chalmers offers Swedish courses to help you settle in.
Contract terms
This postdoc position is a full-time temporary employment for two years.
Application Procedure
Please submit your application in English as PDF files according to the instructions below. Each file should not exceed 40 MB. Note: The system does not support Zip files.
1. CV
Name the document as: CV, [Your Surname]. Include the following:
• A comprehensive CV, including a complete list of publications.
• Details of previous teaching and pedagogical experience.
• Contact information for two references.
2. Personal Letter
Name the document as: Personal Letter, [Your Surname]. Limit the letter to 1–3 pages and include:
• A brief introduction about yourself.
• A summary of your previous research fields and key research outcomes.
• An outline of your future goals and research focus.
Use the button at the foot of the page to reach the application form.
Please note: The applicant is responsible for ensuring that the application is complete. Incomplete applications and applications sent by email will not be considered.
Application deadline: May 25, 2025
For questions please contact:
Professor Åsa Haglund, Photonics Laboratory
E-mail: asa.haglund@chalmers.se
Tel:+46(0)31-772 1592
We look forward to your application!
*** 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 in Gothenburg conducts research and education in technology and natural sciences at a high international level. The university has 3100 employees and 10,000 students, and offers education in engineering, science, shipping and architecture. With scientific excellence as a basis, Chalmers promotes knowledge and technical solutions for a sustainable world. Through global commitment and entrepreneurship, we foster an innovative spirit, in close collaboration with wider society.
Chalmers was founded in 1829 and has the same motto today as it did then: Avancez – forward.