Bulletin of the American Physical Society
2006 Texas Section of the APS Joint Fall Meeting
Thursday–Saturday, October 5–7, 2006; Arlington, Texas
Session PL2: Plenary Session II |
Hide Abstracts |
Chair: John Fry, University of Texas at Arlington Room: UT Arlington, University Center Rosebud Theater |
Saturday, October 7, 2006 8:00AM - 8:30AM |
PL2.00001: Excitonic Superfluidity in Quantum Hall Bilayers: The Wisdom of Experience Invited Speaker: Bose-Einstein condensation (BEC) occurs in Helium liquids where it is responsible for superfluidity and in many metals where pairs of electrons (Cooper pairs) act as bosons and condense giving rise to superconductivity. More recently Bose-Einstein condensation was observed in vapors of weakly interacting alkali metal atoms providing a new window on the quantum behavior of many-interacting particles. I will discuss yet another example of Bose-Einstein condensation which has been discussed in the solid state physics literature for more than 40 years, but has been realized experimentally only recently. The bosons in this case are pairs formed from an electron in one semiconductor quantum well layer and a hole (a missing electron) in a second semiconductor quantum well layer, which combine in a bound state known as an exciton. Many of the properties of excitonic BECs follow from the fact that their number is not quite perfectly conserved, as Einstein had assumed. I will discuss recent experimental results on the properties of semiconductor bilayer exciton BECs and efforts to develop a theory that is able to account for what is seen. [Preview Abstract] |
Saturday, October 7, 2006 8:30AM - 9:00AM |
PL2.00002: Application of Slow Light Physics Invited Speaker: We demonstrate a strong coherent backward wave oscillation using forward propagating fields only. This is achieved by applying laser fields to an ultra-dispersive medium with proper chosen detunings to excite a molecular vibrational coherence that corresponds to a backward propagating wave. The physics then has much in common with propagation of ultra-slow light. Applications to coherent scattering and remote sensing are discussed. [Preview Abstract] |
Saturday, October 7, 2006 9:00AM - 9:30AM |
PL2.00003: Plasmonics, a hot topic in nanophotonics Invited Speaker: The recent observation that certain metallic nanoparticles possess plasmon resonances that depend very sensitively on the shape of the nanostructure has led us to a fundamentally new understanding of the plasmon resonances supported by metals of various geometries. This picture- ``plasmon hybridization,'' reveals that the collective electronic resonances in metallic nanostructures are mesoscopic analogs of the wave functions of simple atoms and molecules, interacting in a manner that is analogous to hybridization in molecular orbital theory. The plasmon hybridization picture can be applied to an entire family of plasmonic nanostructures of various geometries, such as spherical shells, or ``nanoshells,'' offset shells, or ``nanoeggs,'' spheroidal structures ``nanorice,'' nanopaticle aggregates, and finite nanoparticles interacting with extended substrates such as metallic films or nanowires. The new theoretical insight gained through this approach provides an important conceptual foundation for the development of new plasmonic structures that can serve as surface plasmon resonance (SPR) sensors and as substrates for surface enhanced spectroscopies such as surface enhanced Raman scattering (SERS) or surface enhanced infrared absorption spectroscopy (SEIRA) and sub wavelength plasmonic waveguides. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700