Colloquium: Daniel Lopez

    Date: 
    Thursday, January 28, 2016 - 3:30pm - 5:00pm
    Location: 
    Meinel 307
    Description: 

    Spatially reconfigurable photonic systems: from Spatial Light Modulators to active metasurfaces

    Abstract(s): 

    The ability to shape and control the wavefront of propagating light beams is of fundamental importance in science and technology. A large variety of optical elements, such as lenses and spatial light modulators, achieve this by introducing local changes in the phase or amplitude of a propagating signal. In order to do this efficiently, the characteristic dimensions of these optical elements must be comparable or larger than the wavelength of the light. Recently, nanostructured surfaces, or metasurfaces, have been considered for light manipulation because they offer unique possibilities to manipulate light with optical elements far smaller than the wavelength of the light, allowing extreme miniaturization and integration of optical components with electronics and MEMS. The possibility of integrating metasurfaces with MEMS and electronics would enable flat and agile optical elements with ultra-fast reconfiguration time. Reconfigurable metasurfaces may be achieved using MEMS based spatial light modulators in which individual pixels are patterned with nanostructures having different optical response (wavelength, polarization, etc.).

    In this presentation I will describe the fundamentals of metasurfaces based flat optics, our research towards the integration of flat lenses with MEMS devices, and the unique applications that these optical elements would enable.

    Speaker Bio(s): 

    Dr. Daniel López is the Head of the Nanofabrication and Devices group at the Center for Nanoscale Materials at Argonne National Laboratory and is responsible for advancing the state-of-the-art in nanofabrication and the fundamental science of nanoscale systems.His research focuses on understanding long-range interactions in nanoscale systems, light-matter interaction at the nanoscale, and non-linear dynamics of MEMS and NEMS devices.

    He received his Ph.D. in Physics from the Instituto Balseiro in Argentina in 1996. From 1996 to 1998 he worked as a Postdoctoral Fellow at IBM T. J. Watson Research Center (Yorktown Heights, NY) doing research in the field of vortex physics in superconductors. In 1998 he joined Bell Laboratories, Lucent Technologies (Murray Hill, NJ) as a Research Staff Member. At Bell Labs he developed optical MEMS technology for applications that have included communications, lithography, imaging and sensing. Since 2009, he has been working at the Center for Nanoscale Materials at Argonne National Laboratory. He is also a Fellow of the Institute for Molecular Engineering at the University of Chicago. He has authored more than 120 technical publications, holds over 30 granted and pending United States patents, and has given over 100 invited talks all over the world.