Date:Fri, 5 Dec 2008 15:59:33 +0200
Reply-To:Joe van Zwaren <[log in to unmask]>
Sender:Optics Newsletter <[log in to unmask]>
From:Joe van Zwaren <[log in to unmask]>
Subject:OPTICS-L: TAU EE Seminar by Prof. Igor Tsukerman, December 18,
2008 at 14:00, Room 206, Wolfson Mech. Eng. Bldg.,
Tel-Aviv Univ., (parking facing gate 14)
Content-Type:multipart/mixed;
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From: Esther Zilka <[log in to unmask]>
Shalom,
Please find attached a seminar from the Dept. of Physical Electronics for
your information and distribution (if relevant). Thank you, Esther*.*
*The seminar will take place on Thursday December 18,*
*at 14:00, Room 206 at the Faculty of Engineering, Wolfson Mechanical Eng.
Bldg., Tel Aviv University***
** * * * * Seminar * * * * * *
*Novel Approaches in the Simulation and Analysis*
* of Electromagnetic and Photonic Structures*
*Prof. Igor Tsukerman*
Department of Electrical and Computer Engineering,
The University of Akron, OH
The talk covers selected research topics lying in the intersection of
theory, computational methods, and applications in electromagnetics and
photonics.
1. *Theory*. Negative refraction (electromagnetic waves bending the
"wrong" way at material interfaces) and the closely related phenomenon of
backward waves (phase velocity at an obtuse angle with group velocity) have
become one of the most fascinating areas of research in nanophotonics this
century. In the presentation, the mechanism of negative refraction and
backward waves is examined. Explicit lower bounds for the cell size of
metamaterials and photonic crystals capable of supporting backward waves are
established and numerical examples are given.
2. *Computational methods*. The generalized finite-difference calculus
of Flexible Local Approximation MEthods (FLAME) is reviewed and various
examples are presented. FLAME often dramatically improves the accuracy by
incorporating local analytical approximations of the solution into the
difference scheme. For instance, in the computation of Bloch bands FLAME can
produce 6−8 digits in the (generally complex) Bloch wavenumber on Cartesian
grids of very modest size.
3. *Applications *include* *Bloch mode analysis in periodic structures
with or without frequency dispersion, plasmonic field enhancement in optical
"nanolenses" and in near-field microscopy. A new application is
subwavelength "superfocusing" by plasmonic/dielectric nanolayers; the focus
can in principle be arbitrarily sharp.
I gratefully acknowledge the contribution of František Čajko and Jianhua
Dai, as well as collaborative research with the groups of A.P. Sokolov
(Polymer Science, The University of Akron), M. Stockman (Physics, Georgia
State University), F. Keilmann (Max-Planck-Institut für Biochemie, Germany),
and J. P. Webb (Electrical & Computer Engineering, McGill).
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