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Photonic Band Gap (PBG) materials [1,2] are artificial, periodic, dielectrics that enable engineering of the most fundamental properties of electromagnetic waves. These include the laws of refraction, diffraction, and spontaneous emission of light. Unlike traditional semiconductors that rely on the propagation of electrons through an atomic lattice, PBG materials execute their novel functions through...
Trapped atomic ion quantum memories can be locally entangled via the Coulomb interaction and remotely entangled based on probabilistic photonic interfaces. Both versions are presented, highlighting their features and drawbacks when applied to quantum computing and quantum communication protocols.
A general discussion of radiative interference processes in plasmonic nanostructures is presented. It will be shown that the interference between subradiant and superradiant plasmon modes can induce pronounced Fano resonances it the optical spectra.
We measure the second order correlation function for metastable helium atoms released from an ultracold trap source and observe bunching between thermal atoms. When correlations between Bose-Einstein condensed atoms are measured no bunching is observed.
We use the unprecedented LCLS peak power to study nonlinear x-ray multiphoton physics in molecules. We report on fundamental questions concerning the creation and decay of double-core-hole vacancies in N2 by short x-ray pulses.
We achieved a 100-fold improvement in tip-sample stability by stabilizing the tip and the sample in 3D using laser light back-scattered off the apex of an AFM tip and a reference mark in the sample.
We demonstrate spin squeezing of a magnetically sensitive coherent spin-state in an ensemble of ~ 6.5 × 105 cold 87Rb atoms. Quantum non-demolition measurements achieved a spin-noise reduction by 2.9(+1.3-1.0) dB compared to the initial projection noise level.
We generate Sommerfeld-Brillouin precursors from a square-modulated laser pulse through a cold atomic ensemble with electromagnetically induced transparency. At a high optical depth, the precursor forerunner is clearly separated from the delayed main pulse.
We have successfully realized an optical frequency tunable Cs atomic clock with a mode-hop-free fiber laser. The optical frequency of the 9.1926 GHz clock was continuously tuned over 1 GHz without changing the clock frequency.
When molecules are resonantly excited by enhanced near field of silver nanostrips, through a balance between field enhancement and decay modification, Mollow triplet of fluorescence and antibunching of emission photons are found.
The concept and recent progress of optical lattice clocks are reviewed. With the clock uncertainty of 10-17 in perspective, we discuss new challenges in optical lattice clocks and possible applications of such highly accurate and stable atomic clocks.
We experimentally investigate the effects of cascade third-order and fifth-order nonlinear optical processes in a four-level atomic system. The relative strengths of these high-order nonlinear optical processes can be manipulated by controlling the atomic coherence.
Quantum memories are necessary for the implementation of quantum networks and repeaters. Recent progress towards photonic quantum storage in solid state atomic ensembles using photon echo techniques will be presented.
Low expansion glass cavities with optically contacted mirrors can exhibit structural distortions at the mirrors which may shift the temperature at which dv/dT = 0. An update on experiments to confirm finite element modeling analysis is presented.
We study the coherence dynamics of optically trapped 87Rb atoms. We observe a decrease of the dephasing rate for an increasing elastic collision rate, and show that it depends only on the phase space density.
We introduce a theory for the interaction of multi-level atoms with well-stabilized pulse trains, which is general enough to take into account arbitrarily-shaped frequency combs. It is applied to the excitation of rubidium-87 atoms.
We present two schemes for interfacing and manipulating individual atoms: One involves an array of dipole-traps using a spatial light modulator. The other implements cavity-based single photon generation combined with photon storage.
We demonstrate the coherent storage and retrieval of sub-nanosecond low-intensity light pulses with spectral bandwidths exceeding 1 GHz in cesium vapor, using the novel, far off-resonant two-photon Raman memory protocol.
We have developed a one-dimensional optical lattice clock using a fermionic isotope of ytterbium (171Yb). The absolute frequency of the 1S0 - 3P0 clock transition in 171Yb is determined with respect to the SI second.
We demonstrate the use of a moving optical one-way barrier for cooling a collection of atoms, and how sensitive this method is to varying experimental parameters.
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