February 13, 2013
FRONTIERS IN MATERIALS SCIENCE
VINSE COLLOQUIUM SERIES
Professor of Mechanical Engineering
Singapore-MIT Alliance for Research and Technology (SMART) Centre
Massachusetts Institute of Technology
“Nanomanufacturing of Multifunctional Surfaces”
134 Featheringill Hall
Refreshments at 3:45 pm, Featheringill Atrium
Using subwavelength-patterned dielectrics, we have designed and implemented a wide variety of wavefront manipulation elements. The modulation, which may be periodic or aperiodic (chirped,) permits the realization of physical properties, such as refractive index profiles and molecular surface interactions, that are not easily manufacturable in natural materials. Hence, wide opportunities are presented for elements with unprecedented performance across domains (functions) beyond optics, with applications in imaging, telecommunications, and energy harvesting. I will describe in detail one such example of an axial gradient for broadband omni-directional anti-reflective coatings. The same surface pattern also causes the surface to become superhydrophobic or superhydrophilic (depending on the surfactant coating) thus enabling simultaneous control of reflectivity and surface wetting.
George Barbastathis is Professor of Mechanical Engineering at MIT and holds the Singapore Research Professorship for the year 2013. He received the Diploma in Electrical and Computer Engineering from the National Technical University of Athens in 1993, and the M.Sc. and Ph.D. in Electrical Engineering from Caltech in 1994 and ’97, respectively. He has been Post-doctoral Research Associate with the Beckman Institute at the University of Illinois, Urbana-Champaign (1997-99), Visiting Scholar with the School of Engineering and Applied Science at Harvard University (2006-7) and Research Scientist with the Singapore-MIT Alliance for Research and Technology (SMART) Centre in Singapore (2008-9 and 2011). His research is centered on the physics and engineering of 3D optical imaging systems based on phase recovery, volume holography and nanostructured gradient effective index optics. Applications of interest are optical imaging and metrology for biological, environmental, and energy related systems. In 2010, he was elected Fellow of the Optical Society of America.
Host: Jason Valentine