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Photo of Kenneth J盲rrendahl

Kenneth Järrendahl

Professor, Head of Division, Head of Unit

Research

Most of my studies are focused on the use of polarized light to investigate structures on the nanometer scale. Often by using spectroscopic ellipsometry combined with other characterization methods such as electron microscopy and X-ray diffraction. The structures can be thin films, multilayers, superlattices, photonic crystals, sculpted films, and / or metamaterials. In most cases, they are artificially produced, but we have also done several studies of layered structures in beetle shells. It can also be added that I get extra excited if the structures are aperiodic or chiral.

I am head of the Materials Optics unit. Our research is fundamental, yet with a focus on finding and describing new optical phenomena that can be utilized in the future.

Teaching

I see teaching as an important part of my work and have therefore been involved in a variety of courses over the years. Nowadays, I am teaching courses related to Electromagnetics and Optics. I am also interested in pedagogy and have been involved in several educational projects. I also work with the institution's undergraduate educational administration.

What I am doing now

Research wise I am studying the polarization properties of helicoidal structures built of III-nitrides and at the same time trying to expand our knowledge of chiral beetle epicuticle. I am in the program committee for The 8th International Conference on Spectroscopic Ellipsometry (ICSE-8) taking place in Barcelona in May.
I am also preparing for my spring course in Optics and will invoke a new pedagogic approach I believe will make the topic (even more) exciting.

Publications

2026

Siddharth Rana, Chun-Kai Huang, Jun-Ting Ye, Kenneth J盲rrendahl, Ching-Lien Hsiao, Ray-Hua Horng (2026) ACS Applied Electronic Materials (Article in journal)
Ivan Yakymenko, Alessandra Luchini, Joshaniel F. K. Cooper, Sebastian Kohler, Tommy Nylander, Sean Langridge, Christy J. Kinane, Andrew J. Caruana, Bjorgvin Hjorvarsson, Max Wolff, Alexei Vorobiev, Sergiy Valyukh, Fredrik Eriksson, Jens Birch, Kenneth J盲rrendahl (2026) Journal of applied crystallography, Vol. 59, p. 1192-1199 (Article in journal)
Chih Yang Huang, Filip Gucmann, Anoop Kumar Singh, Po-Hsun Chen, Chien-Nan Hsiao, Edmund Dobrocka, Milan Tapajna, Igor Pis, Matej Micusik, Siddharth Rana, Dong-Sing Wuu, Po-Liang Liu, Kenneth J盲rrendahl, Ching-Lien Hsiao, Ray-Hua Horng (2026) DISCOVER NANO, Vol. 21, Article 325 (Article in journal)
Yu-Hsuan Hsu, Roger Magnusson, Rohini Sanikop, Shailesh Kalal, Justinas Palisaitis, Sagar Jathar, Katrin Pingen, Per Sandstr枚m, Issa Nseir, Arnaud le Febvrier, Urban Forsberg, Ray-Hua Horng, Kenneth J盲rrendahl, Per Eklund, Vanya Darakchieva, Jens Birch, Ching-Lien Hsiao (2026) Applied Physics Letters, Vol. 129, Article 031902 (Article in journal)
Hans Arwin, Stefan Schoeche, Arturo Mendoza-Galvan, Kenneth J盲rrendahl, James N. Hilfiker, Roger Magnusson (2026) AIP Advances, Vol. 16, Article 065115 (Article in journal)

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