Internship | Metasurface based Polarization Scramblers for Space Instruments

In general, radiometric instruments have different detection sensitivities for different states of the light polarization, depending on the instrument optical chain. To avoid losing the photons associated to a signal with a polarization for which the instrument is less sensitive, a polarization scrambler is positioned at its entrance, making in this way the instrument able to detect the signal independently of its original polarization: some of the photons will be detected with higher efficiency, while others with a lower efficiency, averaging out to the efficiency for unpolarized light. Unfortunately, the implementation of scramblers with “traditional” optical components (e.g. birefringent wedges) results in bulky and complex to manufacture devices. On the contrary, the use of nanopatterned metasurfaces could considerably simplify the realization of a scrambler with a consequent reduction of its volume, weight and realization costs; all these are very important factors for space technology.

During the internship, the student will undertake the following activities:

• Get familiar with the concept of polarization scramblers and their current state-of-the-art.
• Study the theory and get introduced to the design of optical nanopatterned metasurfaces.
• Assess different concepts of metasurface based scramblers.
• After the selection of a preferred solution, he will proceed at its design/optimization, using electromagnetic modelling tools available at TNO.

During the internship project, student will be assisted by TNO staff members working on optical metasurfaces and space instruments.

The candidate should have a good background knowledge of Electromagnetic Theory and Optics.
You should preferably have some experience with:

• Commercial electromagnetic modelling tools (e.g. ANSYS HFSS and/or ANSYS LUMERICAL and/or CST STUDIO and/or COMSOL).
• Programming in MATLAB/PHYTON

This internship is best suited for MSc final projects, with a duration of 6 to 9 months.

You want an internship opportunity on the precursor of your career; an internship gives you an opportunity to take a good look at your prospective future employer. TNO goes a step further. It’s not just looking that interests us; you and your knowledge are essential to our innovation. That’s why we attach a great deal of value to your personal and professional development. You will, of course, be properly supervised during your work placement and be given the scope for you to get the best out of yourself. Furthermore, we provide:

• A highly professional, innovative internship environment, within a team of top experts.
• A suitable internship allowance (615 euro for wo-, hbo- and mbo-students, for a full-time internship).
• Possibility of eight hours of free leave per internship month (for a full-time internship).
• A free membership of Jong TNO, where you can meet other TNO professionals and join several activities, such as sports activities, (work-related) courses or the yearly ski-trip.
• Use of a laptop.
• An allowance for travel expenses in case you don’t receive an OV-card.

At TNO, we innovate for a healthier, safer and more sustainable life. And for a strong economy. Since 1932, we have been making knowledge and technology available for the common good. We find each other in wonder and ingenuity. We are driven to push boundaries. There is all the space and support for your talent and ambition. You work with people who will challenge you: who inspire you and want to learn from you. Our state-of-the-art facilities are there to realize your vision. What you do at TNO matters: impact makes the difference. Because with every innovation you contribute to tomorrow’s world. Read more about TNO as an employer.

At TNO we encourage an inclusive work environment, where you can be yourself. Whatever your story and whatever unique qualities you bring to the table. It is by combining our unique strengths and perspectives that we are able to develop innovations that make a real difference in society. Want to know more? Read what steps we are taking in the area of diversity, equity and inclusion.

After the first CV selection, the application process will be conducted by the concerning department. TNO will provide a suitable internship agreement. If you have any questions about this vacancy, you can contact the contact person mentioned below.

Important to be aware of before applying:

• Before the start of the internship, the internship agreement from TNO needs to be signed. For students at a college or university based in the Netherlands, TNO uses the UNL-template (supplemented with a number of specific agreements from TNO). For students of foreign and MBO educational institutions, the TNO internship agreement applies. TNO does not sign any other internship agreements.
• Before the start of the internship, the educational institution will need to confirm in writing that:
  • 1) you are enrolled at the educational institution during the internship, and;
  • 2) the internship takes place as part of the programme of the study.
• The confirmation of educational institution takes place by signing the UNL template or forms prepared by TNO.
• Interns at TNO must be in possession of a Dutch residential address at the start of the internship. Performance of internship activities from abroad is not possible.