Asst. Prof. Onur Tokel, a professor in Bilkent University’s Department of Physics and a Principal Investigator at the Bilkent University National Nanotechnology Research Center (UNAM), has published a scientific article entitled “Laser-Written Wave Plates Inside the Silicon Enabled by Stress-induced Birefringence” in the prestigious Optics Letters Journal, which is highlighted as Editor’s Pick.
In the article, Dr. Tokel and his coauthors introduce a method that enables laser-written wave plates inside silicon based on stress-induced birefringence. The research team achieved advanced three-dimensional (3D) optical control within the wafer. The team successfully exploited 3D laser lithography and stress engineering in order to create the first quarter and half-wave plates buried inside Si. This work also constitutes the first observation of the birefringence effect within Si wafers in the literature.
Dr. Tokel is also actively engaged in the “Ultra-Thin, Micro-Grooved/Micro-Channel Glass Production and Processed Glass Technologies” project as part of the A1-1004 Platform. The platform is supported by the TÜBİTAK 1004 Excellence Center Program and is led by UNAM.
You can access Asst. Prof. Onur Tokel’s research through the following link:
https://opg.optica.org/ol/fulltext.cfm?uri=ol-49-1-49&id=544684
