Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session F04: DCMP Prize Session 1Invited Prize/Award
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Sponsoring Units: DCMP Chair: Paul Canfield, Iowa State Univ Room: LACC 151 |
Tuesday, March 6, 2018 11:15AM - 11:51AM |
F04.00001: Oliver E. Buckley Condensed Matter Prize Talk: Aspects of Geometry, Topology and Order in Soft Matter Physics Invited Speaker: Paul Chaikin In soft matter physics we have the advantage of designing the particles, dynamics and interactions for our studies and technologies. Ellipsoids are different from spheres, curved space leads to different order than flat space and shear can promote alignment, disorder or new forms of order. Examples will include, random packing of M&M’s®, disclinations, fingerprints and nanolithography with diblock copolymers, pleats and particle fractionalization with colloids on curved surfaces and 2D freezing on the surface of a sphere. The quantification of order in these and less well understood systems can be addressed by their information content. The length of a losslessly compressed data set is a computable measure of this information as will be illustrated with both equilibrium and driven systems. |
Tuesday, March 6, 2018 11:51AM - 12:27PM |
F04.00002: Julius Edgar Lilienfeld Prize Talk: Plasmonics: Photonic Nanoscience with Societal Impact Invited Speaker: N Halas Metallic nanoparticles, used since antiquity to impart intense, vibrant color into materials, then brought to scientific attention in the 19th century as “Faraday’s colloid”, have more recently become a central tool in the nanoscale manipulation of light. As one begins to assemble metallic nanoparticles into useful building blocks, a striking parallel between the plasmons- the collective electronic oscillations- of these structures and wave functions of simple quantum systems is universally observed. While our scientific foundation for the field of Plasmonics has been built on nanoparticles consisting of noble and coinage metals, more recently we have begun to question whether the same, or similar, plasmonic properties can also be realized in more sustainable materials. Aluminum, the most abundant metal on our planet, can support high-quality plasmonic properties spanning the UV-to-IR region of the spectrum. Nanoscale graphene, when reduced to the molecular limit, sustains many plasmonic properties but introduces new ones such as single-electron color switching, which can be utilized in unique electrochromic devices. We have previously introduced photothermal effects for biomedical therapeutics; now, years after their initial demonstration, this approach is being utilized in human trials for the precise and highly localized ablation of cancerous regions of the prostate, eliminating the highly deleterious side effects characteristic of conventional prostate cancer therapies. Photothermal effects can also be harvested for sustainability applications, which we have most recently demonstrated in an off-grid solar thermal desalination system that transforms membrane distillation into a scalable water purification process. |
Tuesday, March 6, 2018 12:27PM - 1:03PM |
F04.00003: Frank Isakson Prize for Optical Effects in Solids Talk: Light Interactions With Matter, The Gift That Keeps On Giving Invited Speaker: Keith Nelson Advances in our understanding and exploitation of light interactions with matter have been reported at an inspiring pace in recent years. In the study of solids, new methods at every frequency range from microwaves to x-rays have provided improved access to and control over every type of mode including those of thermal, mechanical, vibrational, electronic, and spin degrees of freedom. A brief survey of recent results spanning a wide spectral range will be followed by a discussion of terahertz field interactions with collective electronic states, optical phonons, and magnons, including highly nonlinear responses such as THz-induced electroluminescence, colossal Stark shifts, and electronic/structural phase transitions and including two-dimensional THz spectroscopy of magnons. New results with THz phonon-polaritons and magnon-polaritons will also be presented. |
Tuesday, March 6, 2018 1:03PM - 1:39PM |
F04.00004: Frank Isakson Prize for Optical Effects in Solids talk: Nonlinear light matter interaction at TeraHerz Frequencies: from observation to control. Invited Speaker: Andrea Cavalleri In this talk, I will present an overview of our recent research in the non-equilibrium control of quantum materials. We will especially emphasize that coherent electromagnetic radiation, which has been traditionally used as a spectroscopic tool to observe the symmetry and dynamics of solids, can now be used to control collective properties of materials. In this context, I will discuss the importance of strong field TeraHertz pulses, which can drive cooperative dynamics and switch between different forms of order. Some the phases induced by light are known to exist at equilibrium, although some are hidden and not known. A case in point has been the discovery of transient superconducting fluctuations at temperatures far in excess of the thermodynamic transition temperature, induced by these non-equilibrium driving. I will also emphasize the role of modern infrastructure and new instrumentation, of which the X-ray Free Electron Laser is as the most spectacular. |
Tuesday, March 6, 2018 1:39PM - 2:15PM |
F04.00005: Aneesur Rahman Prize for Computational Physics Talk: Fluids and Deforming Surfaces Invited Speaker: Hans Herrmann Interesting feedback effects occur, when fluids deform their own boundary conditions. The first example I will show is laminar flow through a porous medium. Here large scale LBM simulation show that wall erosion and sediment deposition can produce power-law distributed bursts in flux and pressure. I will also elucidate the similarities to “campylotic” media, i.e. randomly curved spaces. The second example concerns dune formation in turbulent winds. The numerical solution of equations of motions for the granular surface allows reproducing shapes and velocities of dunes. Insight about the Aeolian transport of grains due to saltation and about the resulting electric charges can be obtained through a coupled fluid –particle simulation. The third example is electronic flow on deforming graphene sheets, which can be calculated using relativistic LBM on curved surfaces obtained from large scale MD simulations at fixed temperature. |
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