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Mr Vladimir Pushkarev

Semiconductor nanostructures have a huge potential in the electronics development. The important step on the way to understanding of their electronic properties is measurement and subsequently studying of the nanomaterials conductivity spectra. Localization of charges within nano objects leads to appearance of the depolarization fields which deeply modify the macroscopic conductive response. Optical pump - terahertz (THz) probe spectroscopy is a sensitive tool to such phenomena. In case of complex nanomaterials where phenomenological Drude-Smith model of charges motion is not able to properly describe carriers behavior within an object, aspects of effective medium theory supplemented with Monte-Carlo simulation can be applied for precise analysis.
My project is directed on conductivity investigation of complex materials (periodically or arbitrarily distributed semiconductor nanostructures within some media) by means OP-THz probe time resolved spectroscopy.