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UID:903@fds.yale.edu
DTSTART;TZID=America/New_York:20251203T113000
DTEND;TZID=America/New_York:20251203T130000
DTSTAMP:20251126T200001Z
URL:https://fds.yale.edu/events/fds-colloquium-steven-johnson-mit/
SUMMARY:FDS Colloquium: Steven Johnson (MIT)\, "Co-design of Optics &amp\; 
 Inference"
DESCRIPTION:\nAbstract: Over the past two decades\, an explosion in fabrica
 tion capabilities for nano-structured optics has coincided with the develo
 pment of powerful techniques for "inverse design" — large-scale PDE-cons
 trained optimization\, sometimes with millions of degrees of freedom\, tha
 t reveals surprising irregular structures for a diverse range of devices. 
 Light emission\, sensing\, communications\, and imaging have all begun to 
 exploit rich subwavelength scattering physics with the aid of these techni
 ques. But more than simply applying more computing power\, inverse design 
 has pushed mathematical formulations of engineering design to the forefron
 t: tractable reformulations of device objectives\, new convexifications to
  obtain useful bounds on performance\, algorithms to incorporate manufactu
 ring constraints\, and more. &nbsp\;More recently\, a new design frontier 
 has emerged in which the desired optical outputs are not even specified in
  advance. Instead\, one targets the information that is to be extracted by
  a subsequent computational inference (such as regularized regression or e
 ven neural networks)\, and the optical device is co-optimized "end-to-end"
  along with the image processing/inference to maximize accuracy in the pre
 sence of noise. &nbsp\; &nbsp\;Building on pioneering work by multiple gro
 ups\, the development of fullwave meta-optic end-to-end algorithms is allo
 wing researchers to exploit the extreme polarization\, direction\, and wav
 elength sensitivity possible in subwavelength structures\, in order to obt
 ain radically new designs for problems in hyper-spectral imaging\, depth s
 ensing\, polarization sensing\, thermal imaging\, spectroscopy\, and other
  challenges on the horizons of optics and sensing.\n\n\n\nSpeaker Bio: Ste
 ven G. Johnson is a Professor of Applied Mathematics and Physics at the Ma
 ssachusetts Institute of Technology\, where he joined the faculty in 2004.
  He received his Ph.D. in physics from MIT in 2001\, where he was also an 
 undergraduate student (receiving B.S. degrees in physics\, mathematics\, a
 nd EECS in 1995). He works on the influence of complex geometries (particu
 larly in the nanoscale) on the solutions of partial differential equations
 \, especially for wave phenomena and electromagnetism. This includes analy
 tical theory\, numerics\, and inverse design of devices and phenomena. He 
 is also known more generally for his work in computational science\, such 
 as his development of the FFTW fast Fourier transform library (for which h
 e co-received the 1999 J. H. Wilkinson Prize for Numerical Software) and t
 he Meep and MPB software for electromagnetic simulation. \n
CATEGORIES:Fellows Events,FDS Events,Colloquium
LOCATION:Yale Institute for Foundations of Data Science\, Kline Tower 13th 
 Floor\, Room 1327\, New Haven\, CT\, 06511\, United States
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