Campuses:

Electromagnetic theory

Wednesday, March 15, 2017 - 10:15am - 11:05am
Ross McPhedran (University of Sydney)
Two important problems in current photonics concern the optimal choice of materials for coupling light into surface plasmons, and for use in high absorbing thin layers for photovoltaic cells. We describe recent work on the use of zirconium nitride and titanium nitride as alternatives to silver in gold in coupling light from free space into surface plasmons,and show all four can provide coupling efficiencies over 87 % for wavelengths between 0.5 and 2.0 micron.
Tuesday, October 3, 2006 - 11:00am - 11:50am
Sia Nemat-Nasser (University of California, San Diego)
We outline recent achievements in creating structural composite
materials with controlled electromagnetic properties, as an integral
part of a multifunctional material system. The electromagnetic
response is tailored by incorporating within the material small
amounts of suitably configured, periodically distributed, electric
conductors to produce distributed electric inductance and
capacitance. The small-scale response of the conductors can be
homogenized to give overall macroscopic EM material properties at
Wednesday, October 4, 2006 - 9:30am - 10:20am
Nader Engheta (University of Pennsylvania)
Metamaterials, which are engineered composite media with unconventional electromagnetic and optical properties, can be formed by
embedding sub-wavelength inclusions as artificial molecules in host media in order to exhibit specific desired response
functions. They can have exciting characteristics in manipulating and processing RF, microwave, IR and optical signal
information. Various features of these media are being investigated and some of the fundamental concepts and theories and modeling
Monday, October 2, 2006 - 11:00am - 11:50am
Graeme Milton (The University of Utah)
We show how a slightly lossy superlens of thickness d cloaks
collections of polarizable line dipoles or point dipoles or finite
energy dipole sources that lie
within a distance of d/2 of the lens. In the limit as the loss
in the lens tends to zero, these become essentially invisible
from the outside through the cancelling effects of localized resonances
generated by the interaction of the source and the superlens. The
lossless perfect Veselago lens has
attracted a lot of debate. It is shown that as time
Tuesday, October 3, 2006 - 3:00pm - 3:50pm
Leslie Greengard (New York University)
We will review the analytic and computational foundations of
Green's function-based methods for electromagnetic scattering,
including high order integral representations, fast solvers,
and quasi-periodicity. We will then discuss the development of
easy-to-use numerical simulation environments, and present some
applications to photonic crystals, random microstructures, and
negative index materials.
Wednesday, January 11, 2006 - 9:00am - 9:45am
Sarah Patch (University of Wisconsin)
Thermoacoustic tomography (TCT) is a hybrid imaging technique that has been
proposed as an alternative to xray mammography. Ideally, electromagnetic (EM)
energy is deposited into the breast tissue uniformly in space, but impulsively
in time. This heats the tissue causing thermal expansion. Cancerous masses
absorb more energy than healthy tissue, creating a pressure wave, which is
detected by standard ultrasound transducers placed on the surface of a
hemisphere surrounding the breast. Assuming constant sound speed and zero
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