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Archive for October, 2015

MTT Seminar: COMPUTATIONAL TIME REVERSAL – FRONTIER IN ELECTROMAGNETICS RESEARCH

Tuesday, October 13th, 2015

Upcoming seminar:

Date: 21 October 2015,  14:15, 
Location: room 123 WEiTI PW (Nowowiejska 15/19, Warsaw, Poland)
Presenter: Prof. Wolfgang J. R. Hoefer
IEEE Life Fellow and MTT-S Emeritus Distinguished Microwave Lecturer
University of Victoria, VICTORIA, BC,  Canada
President of Faustus Scientific Corporation

Title: "COMPUTATIONAL TIME REVERSAL 
– FRONTIER IN ELECTROMAGNETICS RESEARCH"

The second law of thermodynamics will likely prevent us from ever reversing time
on earth. Time reversal may thus strike us as a frivolous idea. However, our computational
models of the laws of physics – notably our models of wave propagation – empower us to
commute freely between virtual past and virtual future, and to interchange cause and effect.
This capability has opened a new frontier in electromagnetic design through field-based
synthesis which has been explored only tentatively so far. A major stumbling block has been the
restriction of time and space discrete models to wavelengths that are large compared to the
space discretization parameter, a rule which dramatically impedes the temporal and spatial
resolution in the reconstruction of electromagnetic objects due to the Abbe limit. By abandoning
this restriction we achieve a resolution equal to the discretization step of the algorithm rather
than to one-half of the shortest “acceptable” wavelength. This critical insight promises to be the
key to future progress and success. The talk will explore the features and challenges of
computational time reversal, demonstrate the methodology by means of live simulation
examples, and discuss potential future applications in optimal electromagnetic design through
field synthesis.

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