Monday, February 28, 2011
Friday, February 25, 2011
Thursday, February 24, 2011
TODAY: 2.24.11 / CREOL 102 / 1pm-2pm / OSA Student Chapter Seminar: “How Washington works and why scientists should care” - Greg Shuckman
OSA Student Chapter Seminar: “How Washington works and why scientists should care” - Greg Shuckman CREOL 102 Thursday, February 24, 2011 / 1pm-2pm
Greg Shuckman
Assistant VP for University Relations
With more than 20 years of experience in leadership, advocacy and policy development for postsecondary institutions, associations, and various nonprofit boards and commissions, Greg Schuckman works on behalf of UCF in Washington with a focus on how to improve educational achievement, increase economic opportunity, and enhance access to higher education in our the United States.
Come ready to learn how and why scientists are important to public policy. A brief presentation will be followed by an open discussion, so come with questions!
For More Information:
Matt Weed
OSA Student Chapter President
Wednesday, February 23, 2011
4.6.11 / CREOL 102 / 11-12 / Seminar: “Nanoscale Optics with Negative Metamaterials”– Dr. Sridhar
Seminar: “Nanoscale Optics with Negative Metamaterials”– Dr.
Sridhar
CREOL 102
Wednesday, April 6, 2011 / 11:00am-12:00pm
Srinivas Sridhar
Electronic Materials Research Institute & Department of Physics, Northeastern University, Boston, MA.
Abstract:
Nanoscale optical elements offer the potential of entirely new modalities of superresolution imaging, superfocussing and slow light utilizing the unique properties of negative metamaterials. We discuss our recent work on the experimental demonstration of superresolution imaging using anisotropic nanowire metamaterials. We have also developed new concepts to control the speed of light using metamaterial cladded optical waveguides. These nanoscale metamaterial waveguides offer the prospect of on-chip slow light devices where light speeds are reduced by orders of magnitude, enabling ultra-compact optical delay lines and buffers. The results of this work have potential applications in metamaterials imaging components and optoelectronic systems for military and civilian telecommunication systems.
For More Information:
sagar.physics.neu.edu
TODAY: 2.23.11 / CREOL 102 / 11-12pm / Seminar: "Lasers,Anti-lasers and PT-symmetric Laser-Absorbers" - Dr. Stone
Seminar: "Lasers, Anti-lasers and PT-symmetric Laser-Absorbers" - Dr.
Stone
CREOL 102
Wednesday, February 23, 2011 / 11:00-12:00pm
Dr. A. Douglas Stone
Yale University
Abstract:
A laser is an optical device that transforms incoherent input energy (the pump), into coherent outgoing radiation in a specific set of modes of the electromagnetic field, with distinct frequencies. There is a threshold pump energy for the first lasing mode, and above that energy the laser is a non-linear device and non-linear interactions strongly affect the emission properties of the laser. Surprisingly, the theory of non-linear multimode lasing was quite rudimentary until recently. We describe a new formalism, based on non-hermitian states of the electromagnetic field, which provides a quantitative and tractable description of arbitrarily complex laser systems, including extremely open and non-linear examples, such as random lasers.
Our reformulation of laser theory emphasizes that a laser cavity is a certain kind of scattering system, with a non-unitary amplifying scattering matrix due to the presence of gain. This approach suggested the possibility of constructing a time-reversed or “anti-laser”, which we term a coherent perfect absorber (CPA); a device in which the gain medium of the laser is replaced with a loss medium such that the cavity will perfectly absorb the incoming
(time-reversed) modes of the corresponding laser. Recently we have experimentally demonstrated such a device in a simple silicon cavity, which acts as an absorptive interferometer, in which narrow-band absorption can be both increased to ~ 99% and reduced to ~30%. Finally, the same point of view leads to hybrid devices, containing both gain and loss media, which can function simultaneously as a laser and a perfect absorber for distinct modes of the electromagnetic field. This happens as a result of a spontaneous symmetry breaking transition, which destroys the parity-time-reversal symmetry of the eigenstates of the corresponding S-matrix.
For More Information:
Dr. Demetrios Christodoulides
407-882-0074
demetri@creol.ucf.eduTuesday, February 22, 2011
Osceola County Entrepreneur Summit - Expo Exhibitor Invitation
You’re invited to participate in the Entrepreneur Summit EXPO!
Osceola County
ENTREPRENEUR SUMMIT
April 27, 2011
8:00 AM to 12:00 Noon
Hosted by
Congressman Bill Posey
Florida’s 15th Congressional District
and
WORKFORCE CENTRAL FLORIDA
1392 E. Vine Street
Kissimmee, FL 34744
Building on the success of two previous summits for entrepreneurs, Congressman Bill Posey (R-Rockledge) will host a third forum in Osceola County to continue to bring together various entrepreneurs from across the 15th Congressional District to showcase their innovative technologies to the public and potential investors.
This event will also feature an exhibition area for entrepreneurial resource agencies to provide information to entrepreneurs attending the Entrepreneur Summit from across District 15. Your organization has been identified as a key resource agency for entrepreneurs scheduled to attend this event.
Thank you for registering your agency to participate in this important event. We look forward to seeing you there. Please confirm your agency’s participation in the exhibition area by contacting Shirley Walker at (407) 531-1222 Ext. #2089 or by e-mailing swalker@wcfla.com and completing the attached registration form no later than Friday, April 1, 2011 at 5:00 pm.
Friday, February 18, 2011
3.1.11 / CREOL 102 / 11-12pm / Seminar: “Complex Photonic Nanostructures and Phenomena” - Dr. Hui Cao
Seminar: “Complex Photonic Nanostructures and Phenomena” - Dr. Hui Cao CREOL 102 Tuesday, March 1, 2011 / 11am-12pm
Hui Cao
Department of Applied Physics, Yale University
Abstract:
Wave optics is an old field of physics that has experienced rapid advances lately. Thanks to modern nanofabrication technology, complex nanostructures such as photonic crystals and metamaterials can be fabricated, and they display unusual optical properties and phenomena.
In this talk, I will focus on our studies of photonic nanostructures of random morphology. I show how we can trap light in such structures to make random lasers. Next, learning from the color generation by nanostructures in bird feathers, we use short-range order to enhance light scattering and confinement in artificial nanostructures. Finally I will introduce our recent work on time-reversed laser - coherent perfect absorber.
Biography:
Hui Cao is a Professor of Applied Physics and of Physics at Yale University. She received a Ph.D. from Stanford University in 1997. Her main interests are in Nanophotonics and quantum optics. Her research focuses on understanding and controlling quantum optical processes in nanostructures, both for fundamental physical studies and for device applications. Professor Cao is a David and Lucille Packard Fellow and an Alfred P. Sloan Fellow. She won the Early CAREER Award from the National Science Foundation, and the Maria Goeppert-Mayer Award from the American Physical Society. She became a fellow of the American Physical Society and a fellow of the Optical Society of America in 2007. She has authored/co-authored one book, three book chapters, three review articles, and over one hundred and thirty journal articles. Cao chaired the OSA Technical Group on Photonic Metamaterials from 2006 to 2008. She served as the program co-chair for 2010 International Conference on Quantum Electronics and Laser Sciences (QELS).
For More Information:
Dr. Ayman Abouraddy
407-823-6809
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