Bulletin of the American Physical Society
Fall 2015 Joint Meeting of the Texas Section of the AAPT, Texas Section of the APS and Zone 13 of the Society of Physics Students
Volume 60, Number 15
Thursday–Saturday, October 29–31, 2015; Waco, Texas
Session AA1: Plenary Session I |
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Chair: Dwight Russell, Baylor University Room: B.110 |
Friday, October 30, 2015 8:00AM - 8:15AM |
AA1.00001: Introduction . Trevathan . [Preview Abstract] |
Friday, October 30, 2015 8:15AM - 8:55AM |
AA1.00002: Bringing Nanoscale Matter to Life: Electrically Tunable Metamaterials and Metasurfaces for Control of Absorption, Emission and Scattering Invited Speaker: Harry A. Atwater Progress in understanding resonant subwavelength optical structures has fueled a worldwide explosion of interest in both fundamental processes and nanophotonic devices for imaging, sensing, solar energy conversion and thermal radiation control. For most nanophotonic materials, the optical properties are encoded and fixed permanently into the nanoscale structure at the time of fabrication. Achieving electronic tunability of the optical properties is an emerging opportunity to bring metamaterials and metasurfaces to life as dynamic objects composed of tunable nanoscale resonators and antennas. Gated field effect tuning of the carrier density in conducting oxides and two-dimensional materials enables the optical dispersion of individual structures to be altered from dielectric to plasmonic, yielding active nano-antenna arrays with electrically tunable absorption, radiative emission and scattering properties. [Preview Abstract] |
Friday, October 30, 2015 8:55AM - 9:35AM |
AA1.00003: Maxwell's Demon: Cooling of Atoms and Efficient Isotope Separation Invited Speaker: Mark Raizen We are developing new approaches to the control of atomic motion, realizing the historic thought experiment of Maxwell’s demon, proposed by James Clerk Maxwell in 1871. This toolbox of new methods is an alternative to Laser Cooling, with much better predicted performance in terms of generality, and flux of ultra-cold atoms. These methods also enable efficient isotope separation in a manner that is amenable to scale-up and the production of commercially relevant quantities. This work will be further developed in a non-profit entity, the Pointsman Foundation. Applications include medical imaging, cancer therapy, and energy efficiency [Preview Abstract] |
Friday, October 30, 2015 9:35AM - 10:15AM |
AA1.00004: Witnessing the Formation of Galaxies from their Origins to the Present Invited Speaker: Casey Papovich In 1977, Steven Weinberg stated that "the formation of galaxies is one of the great outstanding problems of astrophysics". This statement remains valid 30 years later, although we have made significant progress. One of the great triumphs of astrophysics is that we are able to predict the growth of dark-matter structures in our Universe with high accuracy. I will discuss how we use observations of galaxies trace these dark matter structures, and how we use observations of some of the most distant galaxies to measure directly the properties of galaxies as they evolve. I focus on results from very deep surveys from telescopes centered around imaging in the Infrared (beyond 1 micron), including data from the Magellan Observatory in Chile, the Hubble Space Telescope, and the Spitzer Space Telescope and Herschel Space Observatory. With data from these telescopes we have measured the star-formation history, stellar-mass assembly, and structural formation of galaxies like the Milky Way Galaxy over the past 10 billion years of history. I will discuss ongoing and future research to understand the "formation epochs" of galaxies, where the ultimate goal is to form a coherent physical theory for galaxy formation. [Preview Abstract] |
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