Bulletin of the American Physical Society
40th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 54, Number 7
Tuesday–Saturday, May 19–23, 2009; Charlottesville, Virginia
Session A1: DAMOP Prize Session |
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Chair: Pierre Meystre, University of Arizona Room: Old Cabell Hall Auditorium |
Wednesday, May 20, 2009 8:00AM - 8:30AM |
A1.00001: I.I. Rabi Prize Talk: Exploring New Frontiers of Quantum Optical Science Invited Speaker: In this talk we will discuss recent developments involving a new scientific interface between quantum optics and atomic physics, many body physics, nanoscience and quantum information science. Specific examples include quantum manipulation of individual spins and photons using impurities in diamond and control of light-matter interactions using sub-wavelength localization of optical fields. Novel applications of these techniques ranging from implementation of ideas from quantum information science to nanoscale magnetic sensing will be discussed. [Preview Abstract] |
Wednesday, May 20, 2009 8:30AM - 9:00AM |
A1.00002: Herbert P. Broida Prize Talk: Experimental realization of coherent control of molecular dynamics and chemical reactions with feedback-optimized laser pulses--Quantum Control of Femtochemistry Invited Speaker: By using coherent control techniques we control the behavior of quantum systems on their natural fs-time scale by applying ultrashort coherent light fields in the wavelength range from the IR to the UV. These laser pulses can be variably shaped in space and time using a laser pulse shaper consisting of a liquid-crystal display. [1] Laser-optimized femtochemistry in the gas phase and liquid phase is one field in which this new technique is successfully employed. Automated optimization of branching ratios and total product yields of gas phase photodissociation reactions as well as chemically selective molecular excitation in the liquid phase is performed~[2][3]. Structural changes of a molecule in the liquid phase have been controlled by laser-optimized photoisomerization of a cyanine dye molecule [4] and of retinal in bacteriorhodopsin [5]. So far, optimal control techniques have been restricted to gas phase and condensed phase optimization experiments. Recently we have demonstrated femtosecond laser-assisted catalytic reactions on a Pd(100) single crystal surface. By applying a closed-loop optimal control scheme, we manipulate these reactions and selectively optimize the ratio of different bond-forming reaction channels, in contrast to previous quantum control experiments aiming at bond-cleavage. The results represent a first step towards selective photocatalysis of molecules. \\[4pt] [1] T. Baumert et al, Appl. Phys. B 65, 779 (1997)\\[0pt] [2] A. Assion et al, Science 282, 919(1998); T. Brixner et al, J. Mod. Opt. 50, 539 (2003)\\[0pt] [3] T. Brixner et al, Nature, Vol. 414, 57 (2001) and J.~Chem. Phys. 118, 3692 (2003)\\[0pt] [4] G. Krampert et al, Phys. Rev. Lett. 94, 068305 (2005)\\[0pt] [5] G. Vogt et al, Chem. Phys. Lett. 433, 211 (2006) P. Nuernberger et al, Phys. Chem. Chem. Phys. 9, 2470 (2007) [Preview Abstract] |
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