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Center for Astrophysics Research and Technologies Seminar Series Information


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Optical Superresolution via Wavefront Projections

Friday March 23, 2018
3:30 pm

 Presenter:  Sudhakar Prasad, UNM, Physics and Astronomy
 Series:  Physics and Astronomy Colloquium
 Abstract:  Lord Rayleigh's classic resolution limit on separating two remote, closely-spaced point sources from their images has become a mere relic, one that has been usurped spectacularly by modern advances in image processing, new imaging methodologies, and ingenious work-arounds. Yet the best pair resolution that one can hope to achieve seems to be fundamentally limited by the number of signal photons available for making direct image measurements. I will discuss a new paradigm of pair super-resolution that can qualitatively improve upon this seemingly insuperable photon limit, with quantum estimation theory revealing the ultimate bound on this phenomenon. Rather surprisingly, as I will also show, one can attain this bound in certain limits in all three spatial dimensions with purely classical measurements that are not image based, but rather utilize coherent projections of the optical wavefront. Phase does matter, even when it comes to making good images of incoherent objects.
 Location:  Room 125, Dane Smith Hall

Refreshments will be available before the colloquium, at 03:15 pm, in in the lobby of Dane Smith Hall.

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