Defence in the field of Radio Engineering, M. Sc. (Tech.) Xuchen Wang

Title of the thesis is “Surface-impedance engineering for advanced wave transformations”

The public defense will be organized via remote technology.  Zoom link:

Engineering thin material layers in space and time for extreme electromagnetic wave control

Conventional devices for controlling electromagnetic wave, such as mirrors, lenses, gratings, etc., have limited functionalities, efficiency, and, usually, large dimensions. This dissertation shows that ultra-thin material layers engineered in space and/or time can completely substitute the conventional wave-controllers and, moreover, realize arbitrarily defined functionalities. To this goal, the dissertation develops a systematic method for modeling and design of metasurfaces for general application purposes. Based on the developed method, extraordinary wave phenomena which do not exist in nature are demonstrated, e.g., asymmetric mirrors, nonreciprocal wave amplifiers, and multifunctional gratings.

Opponent: Assist. Professor Juan Sebastian Gómez-Díaz, University of California, USA

Supervisor:  Professor Sergei Tretyakov, Aalto University School of Electrical Engineering, Department of Electronics and Nanoengineering.

Electronic dissertation:

Contact information: Xuchen Wang, Department of Electronics and Nanoengineering, [email protected] +358503097794

The dissertation is publicly displayed 10 days before the defence:


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