Seminar
Key Laboratory of Inorganic Functional Material and Device, CAS
Shanghai Institute of Ceramics, Chinese Academy of Sciences
中国科学院无机功能材料与器件重点实验室

Domain nanotechnology in lithium niobate and lithium tantalite single crystals

Speaker: Prof. Vladimir Ya. Shur

Ural State University, Russia

时间：2012年03月23日（星期五）上午09:30

地点： 4 号楼 14楼第一会议室

联系人：曾华荣、李国荣、殷庆瑞

Abstract:

Nanodomain engineering (“domain nanotechnology”) has become recently one of the most important targets of ferroelectric science and technology. The periodical spatial modulation of the electro-optic, photorefractive, and nonlinear optical properties by creation of the tailored domain structures allows to manufacture devices with upgraded performance. The optimization of the poling process resulting from the detail study of domain structures with submicron spatial resolution is expected to enable the fabrication of sub-micron-pitch gratings and precise engineered structures, which could meet the specifications for the photonic applications. The ultimate interest is the exploitation of the nanodomain structures with capabilities for nonlinear optical devices.

It was shown that formation of the self-assembled structures consisting of the chains of isolated nanodomains can be achieved in lithium niobate (LN) and lithium tantalate (LT) crystals under highly non-equilibrium switching conditions realized by application of the external field to crystal with modified surface layer (“artificial dielectric gap”) or by pyroelectric field appeared during cooling after short pulse heating.

The unified approach to the ferroelectric domain kinetics based on the nucleation was used for explanation of all various domain evolution scenarios, so-called “discrete switching”, in LN and LT single crystals. The effects of correlated nucleation and anisotropic domain growth were taken into account. It was proved that the domain kinetics scenario is determined by the screening process effectiveness.

The periodic structures with nanoscale precision were produced by local switching of the single-domain state by application of the inhomogeneous electric field using lithographic electrode pattern. The various periodic modifications of the surface layer look very promising.

CURRICULUM VITAE

Vladimir Ya. SHUR

·Director of the Ural Center of Shared Use “Modern Nanotechnology”, Ural State University, Ekaterinburg, since March 2009

·Director of the Nanotechnology Department of the Sverdlovsk’s Region Foundation «Innovative Technology», since 2007.

·Director of the Ural Center of Shared Use “Scanning Probe Microscopy”, Ural State University, Ekaterinburg, since March 2004

·Professor of the Chair of Computer Physics, Ural State University, Ekaterinburg, since August 1992.

·Head of Ferroelectrics Lab, Institute of Phys. & Applied Mathematics, Ural State University, since December 1981.

Work abroad:

·Visiting Professor of IWE RWTH Aachen, Aachen, Germany, July 1997, and August 2000.

·Visiting Professor of Stanford University, Stanford, CA, December 1997, April 1998, July 1998,
March 1999, July 1999, September 1999, August 2001, February 2002, and August 2002.

·Visiting Professor of Penn State University, University Park, PA, August - September 1999.

·Visiting Professor of Darmstadt Technical University, Darmstadt, Germany, August 2000, July 2002, July 2003, July 2004, July 2005 and July 2006.

·Visiting Professor of National Institute for Materials Science, Tsukuba, Japan, March, December 2000, November-December 2001, May 2002, October 2003, and September 2004, February 2008.

·Visiting Professor of Laboratoire Matériaux et Microélectronique de Provence, Universite de Toulon et du Var, La Garde, France, June-July 2001, July 2003, July 2004, July 2005 , July 2006 , July 2006 and  July 2007. 

·Visiting Professor of Laboratoire de Physique de la Matiere Condensee de Universite de Nice - Sophia Antipolis, Nice, France, September 2002.

Memberships

·Member of Scientific Council of Russian Academy of Science on Ferroelectrics and Dielectrics,
since 1990.

·Vice-president of Ural Branch of Optical Society of Russia, since 1991.

·Editorial Board Member of the International Journal “Integrated Ferroelectrics”, since 1992.

·Editorial Board Member of the International Journal “Ferroelectrics”, since 2006.

·Member of Material Research Society, since 1995.

·Member of Optical Society of America, since 2002

·Member of Nano-technological Society of Russia, since 2008.

·Member of the Presidium of the chief designers Council of the Sverdlovsk region industrial enterprises, since 2009.

Awards:

·Honorary Worker of High Professional Education of Russian Federation since 2005

Publication:

Papers: more than 200.

Joint Monographs Chapters: 5

Citation index: 1740

Hirsh index: 20

Research interests:

·Domain engineering in lithium niobate and lithium tantalate for nonlinear optical application;

·Micro and nano-domain engineering in ferroelectrics;

·Ferroic domain structure: arising and evolution;

·Polarization reversal process in ferroelectrics;

·Ferroelectric thin films: kinetics of crystallization and phase transformations;

·Kinetics of phase transformations;

·Nanotechnology