Optical Properties and Applications of Semiconductor Nanocrystals

Monday, December 14, 2015 to Tuesday, December 15, 2015

 

Infotech Oulu Doctoral Program

 

Lecturer: Prof. Victor Yu. Timoshenko, Professor at the Physics Department of Lomonosov Moscow State University, Russia

Date & time:

December 14, 2015 (Monday), 9-13
December 15, 2015 (Tuesday), 9-13

Room: TS267 (Tietotalo 1, OEM Lab)

The first part of the course describes the fundamentals of the optical properties of bulk semiconductors and nanostructures. The wave equation in conductive medium, complex dielectric function and refractive index are discussed and their relations with the following optical characteristics of condense matter as reflection, transmission, and absorption are given. The optical absorption processes via intra- and inter-band electron transitions are analyzed by using the Drude-Lorentz model and quantum theory, respectively. An effect of quantum confinement on the optical properties of semiconductor nanostructures is discussed. The optical response of a nanocomposite material is analyzed in the framework of effective medium approximation. The role of free charge carriers on the optical properties of semiconductor nanocomposite is discussed.

The second part of the course presents a review of the most prominent applications of semiconductor nanocrystals in optoelectronics and biomedicine. The special attention is paid on Silicon-based nanocrystals because they are biocompatible, biodegradable and possess photoluminescence in the visible and middle-IR ranges. Formation of Silicon-based quantum dots and nanowires by different chemical, electrochemical and laser-assisted methods are discussed. These nanomaterials are analyzed as nontoxic fluorescent labels, photo- and sono-sensitizers for biomedical applications as diagnostics and therapy of cancer.

More information: Alexey Popov

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Last updated: 7.12.2015