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We observed nutation in the time-resolved photoluminescence signals from resonantly coupled ZnO double-quantum-well structures via optical near-field energy transfer, in which the period of the nutation was determined to be 550 ps.
We show that periodic nanostructure made of alternating layers of Ag and Mo can serve as an efficient source of hard X-ray transition radiation for medical applications, which uses low energy electrons.
Time coding quantum key distribution is analysed considering optimal individual attacks based on intrication. Security can be guaranteed in case of setup imperfections and for quantum bit error rates up to 12 %.
We propose a quantum key distribution scheme using the spatial properties of the entangled photon pairs generated from parametric downconversion. The security of this scheme is guaranteed by the distributed entanglement.
We report the observation of coherent phonon oscillations of radial breathing modes in insolated single-wall carbon nanotubes in suspension. Resonantly-excited radial breathing modes are analyzed to give us a new tool for chirality assignments, complimentary to photoluminescence and CW Raman spectroscopies.
We have experimentally obtained the reflection transfer function of a phononic bandgap nano-crystal including phase information by using a single-quantum-well in a phonon cavity. Our time-domain investigations help to resolve the apparent ldquosuperluminalrdquo paradox.
We report the first experimental observation of discrete quadratic interface solitons existing at the edge of a PPLN waveguide array. Both in-phase and staggered discrete surface solitons were observed.
ldquoZero-meanrdquo optical potentials are used to manipulate dephasing of ultra-cold atoms confined in atom-optical billiards. Generic and non-generic perturbations result in qualitatively different dephasing properties. Different phase-space regimes are probed and identified.
Fringes of total atomic density produced in an atom interferometer consisting of two off-resonant standing wave pulses were directly imaged using an ldquooptical maskrdquo technique. Fringe periods with integer fractions of the standing-wave period were observed.
In this paper we present experimental results on flux, fluctuations and noise on an atom laser beam and discuss the implications of these measurements to high precision interferometry with atoms.
Femtosecond time-resolved photoelectron spectroscopy has been used to measure the electron-phonon coupling constant of free size selected Nan+ (n=16-250) clusters. The extrapolated electron-phonon coupling constant of bulk sodium is gB sime 2:3 times 1016 W/m3K.
We observe spontaneous symmetry breaking in a 87Rb spinor Bose condensate quenched across a quantum phase transition. This quench causes inhomogeneous ferromagnetic regions and topological defects to form in a magnetic quantum fluid.
We designed photonic crystal cavities for coupling to colloidal quantum dots suspended in a polymer film. We experimentally observe the coupling of quantum dot emission to cavity modes at room temperature.
Photonic crystal slab nanocavities containing one layer of quantum dots have exhibited: strong coupling to a single quantum dot; tuning by condensation of xenon gas; linewidth broadening due to ensemble dot absorption; gain and lasing.
We prove that build-up of evanescent surface waves are responsible for the enhanced transmission, by comparing periodic and random arrays of holes punctured in metal and dielectric absorber substrate.
Ultrafast trapping and recombination processes are analyzed in GaMnAs layers with a series of Mn concentrations. Anomalous magnetization dependent coherent signal is presented regarding the ferromagnetism of the sample.
Terahertz emission is observed from ferromagnetic GaMnAs when the samples are excited at normal incidence with 3.1 eV, 130 fs laser pulses. We demonstrate experimentally that the radiation is directly related to the sample magnetization.
A one-dimensional photonic bandgap lattice consisting of 72 periodically-cascaded microrings was fabricated in benzocyclobutene. A wide bandgap of 1.6 nm and extinction > 20dB were achieved. The device exhibited low transmission loss even after 72 microrings.
In ultra-intense ultrafast laser-matter interaction, the interplay of laser-induced oscillating space-charge fields with laser E- and B-fields can strongly affect whether the interaction is relativistic or not; with increasing intensities, relativistic character may saturate.
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