16.12. Sophisticated optical measurements and applications by polarization control

Public examination of a doctoral dissertation in the field of Physics

Doctoral candidate: M.Sc. Ismo Vartiainen 

Date and venue: 16.12.2011 at 12 noon, M100, Metria, Joensuu 

M.Sc. Ismo Vartiainen has studied polarization control of light by nanometer scale structures. Polarization describes the vibration direction of electromagnetic radiation, such as light, which has a significant impact on optical applications, i.e. display technologies and optical measurements. 

In his thesis, Vartiainen has considered both design using rigorous electromagnetic theory, and fabrication of sub-wavelength structures for polarization control using electron beam lithography. This fabrication method that has been adopted from electronic industry enables fabrication of structures with nanometer scale features. Electron beam lithography has been applied and researched in the University of Eastern Finland at the Department of Physics and Mathematics in Joensuu, for around 20 years, and the current equipments and facilities are top-level in this research area among the European facilities. Vartiainen has also developed fabrication processes that are needed to fabricate the aforementioned structures to metallic and dielectric thin films. These kinds of structures can be exploited in several optical measurements in life sciences and material research. 

The doctoral dissertation of M.Sc. Ismo Vartiainen entitled “Polarization control and coherence-polarization mixing by sub-wavelength gratings” will be examined at the Faculty of Science and Forestry. The opponent in the public examination is Professor Massimo Santarsiero, Universita Roma Tre and CNISM and the custos is Professor Markku Kuittinen of the University of Eastern Finland.

Photo available for download at http://www.uef.fi/vaitoskuvat

Contact: Ismo Vartiainen, tel. +358 50 357 5702, ismo.vartiainen@uef.fi

Publishing year: 2011

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