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The Birck Nanotechnology Center (BNC) is an interdisciplinary research unit that provides infrastructure for 160 affiliated faculty members and their research groups from 36 academic units at Purdue. The 186,000 sq ft. facility includes a 25,000 sq. ft. ISO Class 3-4-5 (Class 1-10-100) nanofabrication cleanroom – the Scifres Nanofabrication Laboratory – that includes a 2,500 sq. ft. ISO Class 6 (Class 1000) pharmaceutical-grade biomolecular cleanroom.

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Researchers at Purdue, Stanford devise novel ultrafast laser beam steering for autonomous cars that is less complex, uses less power

April 4, 2018

WEST LAFAYETTE, Ind. – Researchers at Purdue University and Stanford University believe they have found a novel laser...

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Jonathan Fan Seminar

April 25, 2018

 

High Performance Meta-optical Systems for Extreme Waveform Control

Bio: Dr. Fan is an Assistant Professor in the Department of Electrical Engineering at Stanford University, where he is researching new design methodologies and materials approaches to nanophotonic systems.  He received his bachelor’s degree with highest honors from Princeton University and his doctorate from Harvard University, where he worked with Federico Capasso.  He is the recipient of the Air Force Young Investigator Award, Sloan Foundation Fellowship in Physics, Packard Foundation Fellowship, and the Presidential Early Career Award for Scientists and Engineers, which is the highest honor bestowed by the United States government on outstanding scientists and engineers in the early stages of their research careers.

Abstract: In this talk, I will show that new classes of ultra-high efficiency dielectric metasurfaces, based on topology optimization, can be realized for extreme waveform control.  These devices utilize qualitatively new types of light-matter interactions based on strong near-field interactions between dielectric nanostructures, and they enable new diffractive optics phenomena compared to the current state-of-the-art.  A theoretical analysis of the supermodes supported by these devices elucidates the underlying physical mechanisms that make such beam deflection possible.  To demonstrate the power and versatility of our design approach, I will present devices that can efficiently deflect light to extreme angles, exhibit anomalous refraction, and multiplex different beam steering functions for differing wavelengths.  I will also discuss and demonstrate how these concepts can generalize to ultra-high efficiency, large numerical aperture metalenses.  We envision that high performance computational design and big data approaches will be essential to defining and designing the next generation of nano-based optical devices.

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