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2015 International Year of Light Ottawa Opening
Extreme Photonics, Center for Research in Photonics University of Ottawa
and
IEEE Photonics Society Ottawa Chapter
Date:Â Wednesday, January 21, 2015
Room: ARC 233
Location: University of Ottawa, 25 Templeton Street, Ottawa
Time: 8:30am – 12:00pm
PLEASE CLICK HEREÂ TO SEE THE ATTACHEMENT FOR THE PROGRAM AND REGISTRATION INFORMATION
Speakers:
Prof. Carmen Menoni, Colorado State University
Abstract: Photonics at extreme ultraviolet and soft x-ray wavelengths on a table-top
With wavelengths of a few to tens of nanometers extreme ultraviolet (EUV) and soft x-ray (SXR) light is being exploited in a rapidly increasing number of scientific and technological applications, from imaging to spectroscopy, to the lithography of semiconductor chips with 13.5 nm wavelength light. Recent advances in the generation of bright EUV/SXR laser beams on a table top are opening unique opportunities to advance photonics in this challenging and relatively unexplored region of the electromagnetic spectrum. This presentation will review results of efforts at Colorado State University on the generation and utilization of EUV/SXR lasers for nanoscale imaging, nano-spectrometry imaging and nanopatterning. These photonic applications are making possible the imaging of nanostructures and their dynamics, the three dimensional nanoscale mapping of the chemical composition of organic and inorganic materials, and the printing of periodic arrays of nanoscale features error-free, providing new opportunities to access and probe the nanoworld.
Prof. Mark I. Stockman, Georgia State University in Atlanta
Abstract:Â Condensed Matter in Ultrafast and Superstrong Fields: Attosecond Phenomena l
We discuss latest developments in theory and recent experimental results for a new class of phenomena in condensed matter optics when a strong optical field ∼1-3 V/Å reversibly changes the solid within an optical cycle [1-7]. During a single-oscillation of a strong optical pulse, a dielectric undergoes a reversible transition to a semimetallic state, which follows the instantaneous optical field during time intervals on order of hundred attoseconds. Such a pulse drives ampere-scale currents in dielectrics and controls their properties, including optical absorption and reflection, extreme UV absorption, and generation of high harmonics [8] in a non-perturbative manner on a 100-as temporal scale. Applied to a metal, such a pulse causes an instantaneous and reversible loss of the metallic properties. We will also discuss or latest theoretical results on graphene, a semimetal, in a strong ultrashort pulse field [9, 10] revealing unique behavior inherent in graphene. These are fastest phenomena in optics unfolding within half period of light. They offer potential for petahertz-bandwidth signal processing, generation of high harmonics on a nanometer spatial scale, etc.
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