Postdoc in Photoacoustic Imaging of Microplastics

Thursday 04 Nov 21

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Apply no later than 30 December 2021
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Microplastics waste has already been a worldwide environmental issue. This is mainly due to several factors such as ultraviolet light (from the sun) photo-bleaching, mechanical erosion, and wind, that degrade the plastic wastes into non-decomposable particles in micro and nanometer scales, then disperse into natural water bodies, soil, and finally flora and fauna chain. There are a series of evidences for the wide intake of microplastics by humans through ingestion of contaminated food. Therefore, detection and removal of microplastics have been becoming to an urgent issue.

This postdoc project, funded by a Villum Experiment 2021, aims to develop a unique system for high-resolution and fast detection of microplastics in aquatic environment using the photoacoustic modality. The emerging gas-filled fiber laser technology will be used as light source, to generate high-energy laser pulses targeting the strong absorption bands of microplastics compounds. Therefore, our group is seeking a highly motivated and talented postdoc candidate willing to work on a challenging scientific project in a serious but also friendly and team-work oriented environment in the fields of fiber optics, laser technology and photoacoustic microscopy.  This post-doc position is 1 year with possibility of extension, in the Neural Devices and Gas Photonics (NDGP) Group at DTU Fotonik, Department of Photonics Engineering at the Technical University of Denmark.

Responsibilities and qualifications
The overall focus of the project will be the development of a photoacoustic microscope system and detection of microplastics using this system. The applicant’s responsibilities will include:

  • Developing and characterizing the laser source to be used as the central component of the microscopy setup;
  • Designing, building and characterizing the photoacoustic microscopy system;
  • Preparing and characterizing the microplastics samples;
  • Signal post-processing and image reconstruction.

In completing these tasks, you will work side-by-side with colleagues having state-of-the art knowledge in lasers, fiber, and imaging technologies.

As a formal qualification, you must hold a PhD degree (or equivalent).

The successful candidate is expected to have experience and expertise in one or more of the following subjects:   

  • Good knowledge of high-power and high-energy lasers;
  • Experience with hollow-core fibers;
  • Experience with microscope technologies (e.g., photoacoustic imaging) ;
  • Experience with weak voltage signal process;
  • Familiar with Matlab coding and image process.

Candidates are required to have excellent communication skills in English (both written and spoken) and a proven ability to work independently, as well as to plan and carry out complicated tasks.

We offer
DTU is a leading technical university globally recognized for the excellence of its research, education, innovation and scientific advice. We offer a rewarding and challenging job in an international environment. We strive for academic excellence in an environment characterized by collegial respect and academic freedom tempered by responsibility.

Salary and terms of employment
The appointment will be based on the collective agreement with the Danish Confederation of Professional Associations. The allowance will be agreed upon with the relevant union. The period of employment is 1 years.

The place of work is DTU Fotonik, Ørsteds Plads, Building 343, DK-2800 Kongens Lyngby, Denmark.

You can read more about career paths at DTU here.

Further information
Further information may be obtained from Associate Professor Christos Markos, email: and Dr. Yazhou Wang, e-mail:

You can read more about DTU Fotonik on

If you are applying from abroad, you may find useful information on working in Denmark and at DTU at DTU – Moving to Denmark.

Application procedure
Your complete online application must be submitted no later than 30 December 2021 (Danish time). Applications must be submitted as one PDF file containing all materials to be given consideration. To apply, please open the link "Apply online", fill out the online application form, and attach all your materials in English in one PDF file. The file must include:

  • Application (cover letter)
  • CV
  • Academic Diplomas (PhD)
  • List of publications

All interested candidates irrespective of age, gender, disability, race, religion or ethnic background are encouraged to apply.

DTU Fotonik has 220 employees with competences in optics. In a typical year, DTU Fotonik educates 30 PhD students from more than 25 countries and our student numbers are constantly growing. As one of Europe’s largest public photonics research departments, DTU Fotonik covers a multitude of optical disciplines ranging from fundamental light-matter interaction and optical telecommunications to applied research and innovation. Our research topics include optical sensors, lasers, LEDs, photovoltaics, ultra-high speed optical transmission systems, bio-photonics, nano-optics and quantum photonics. 

Technology for people
DTU develops technology for people. With our international elite research and study programmes, we are helping to create a better world and to solve the global challenges formulated in the UN’s 17 Sustainable Development Goals. Hans Christian Ørsted founded DTU in 1829 with a clear vision to develop and create value using science and engineering to benefit society. That vision lives on today. DTU has 12,900 students and 6,000 employees. We work in an international atmosphere and have an inclusive, evolving, and informal working environment. DTU has campuses in all parts of Denmark and in Greenland, and we collaborate with the best universities around the world.