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Mathematical Shape Optimization in Electromagnetics for Nano-Photonics, Photovoltaics, EUV Lithography, & Heat-Assisted Magnetic Recording

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What
  • Faculty Lecture Series
When Aug 01, 2014
from 02:00 PM to 03:30 PM
Where Engr. IV Bldg., Tesla Room 53-125
Contact Name
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Eli Yablonovitch

University of California, Los Angeles & Berkeley

 

Abstract

Numerous nano-photonic systems are now being proposed, but nano-fabrication remains much too difficult for trial and error optimization of the electromagnetic shapes. Rational inverse electromagnetic design is needed, so that the fabrication effort can be focused directly into validated nano-designs. This calls for nano-shape optimization, based on inverse solutions of Maxwell's Equations.  For a given goal, what is the optimum electromagnetic geometry? 

The mathematical adjoint method seems to be the best suited for arriving at these optimal shapes. A small, custom, inverse design software package, employing steepest descent, wraps around commercial Maxwell solvers, such as COMSOL or Lumerical. I will show specific examples of non-intuitive electromagnetic nano-designs for silicon photonics, optical nano-antennas, photovoltaics, extreme ultraviolet lithography, and heat-assisted magnetic recording.

Biography

Eli Yablonovitch is Director of the NSF Center for Energy Efficient Electronics Science (E3S), a multi-University Center based at Berkeley. 

After a career in industry and academia, Yablonovitch is now adjunct Professor of Electrical Engineering at UCLA, and Professor of Electrical Engineering and Computer Sciences at UC Berkeley, where he holds the James & Katherine Lau Chair in Engineering.

He contributed the 4n2 light-trapping factor tosolar cells, which is used commercially in most solar panels world-wide.  He introduced the benefit of strained quantum well lasers, an idea which is employed widely in most semiconductor lasers.  He is regarded as a Father of the Photonic BandGap concept, and he coined the term "Photonic Crystal".

Prof. Yablonovitch is a Fellow of the Optical Society of America, the IEEE, and the American Physical Society. He was elected a Member of the National Academy of Engineering, the National Academy of Sciences, the American Academy of Arts & Sciences, and as Foreign Member of the Royal Society of London.  He has been awarded the Adolf Lomb Medal, the W. Streifer Scientific Achievement Award, the R.W. Wood Prize, the Julius Springer Prize, the IET Mountbatten Medal (UK), the IEEE Photonics Award, the Harvey Prize (Israel), and the Rank Prize (UK).  He also has an honorary Ph.d. from the Royal Inst. of Tech., Stockholm Sweden, and from the Hong Kong Univ. of Sci. & Technology.

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