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We have studied experimentally and theoretically the parasitic lasing phenomenon in large-aperture Ti:sapphire crystals to optimize amplification schemes of multi-petawatt class Ti:sapphire laser. Simulations and experimental results of high power amplification will be presented.
We report the first single-shot measurements of transverse and longitudinal structure of laser-generated wakefields. Real-time, non-averaged measurements of resonant wakes reveal detailed temporal and spatial features that depend on pulse energy and electron density.
Ultrafast reorientation of the antiferromagnetic order parameter of NiO is triggered by a photoinduced transient modification of the magnetic anisotropy and evidenced by the subsequent interference of the hard- and easy-axis states.
Using an anisotropic plane-wave expansion method first worldwide theoretical evidence of spectral band structure asymmetry (omega(k)neomega(-k)) and band gap tunability (as a function of magnetization direction) is obtained for 2-dimensional magneto-photonic crystals.
We show theoretically how electrical and pure spin AC currents can be optically injected in semiconductors via excitation of continuum carriers. The electrical current should be observable by detecting its THz radiation.
We observe entanglement of two remote atomic qubits, by generating entangled state of an atomic qubit and a single photon, transmitting the photon to an adjacent laboratory, and converting the photon into an atomic qubit.
We have observed quantum interference currents by exciting exciton transitions in GaAs quantum wells. A phase shift of the current occurs when tuning the exciting photon energy from the heavy hole to the light hole exciton transition.
Spin gratings lasting longer than the carrier lifetime are measured in lightly n-doped quantum wells. In a magnetic field, precession of the grating is observed, and diffusion rates are determined by varying the grating period.
With broad-band optical pumping of Rb 87, we observed stimulated Raman scattering (SRS) between hyperfine ground states, and measured the photon number statistics. Several signal strength dependent factors are also analyzed.
We propose a configuration comprised of coupled quantum wells to exhibit zero group velocity of a light probe field without external pump, using resonant tunneling.
We exploit both the high nonlinearity and holey structure of microstructured fibers to combine an ultra-broadband light source and a gas cell in a single microstructured fiber filled with acetylene.
We observed 7.2 dB squeezing of continuous-wave light at 860 nm with a periodically-poled KTiOPO4 crystal in an optical parametric oscillator. The squeezing level was obtained as the LO phase was locked.
Dicke narrowing dominates over collisional dephasing in gas phase H2 up to 500 Torr, permitting the efficient production of a record 70,000 cm-1 broad Raman sideband spectrum by molecular modulation at room temperature.
Sequential quantum teleportation for continuous variables is experimentally demonstrated. By using two high fidelity teleporters, an unknown coherent state is teleported twice and fidelity is F = 0.53plusmn0.2.We show the measurement results using optical homodyne tomography.
An experiment is proposed for performing adaptive phase measurements on a continuous squeezed beam such that the variance is below the standard quantum limit. The theory takes into account many issues ignored in previous work.
We report on the scalable and deterministic generation and tomographic characterization of entangled states of up to 8 trapped ions and experiments towards entangling ions and photons.
This paper will present fiber laser cutting results in stainless steel using a PSO enabled motion system. The objective for this work is to minimize the HAZ and heat distortion during laser micro machining.
Vaporization of explosives is done at 1.5 μm and the vapor is analyzed for NO emission by MIR laser spectroscopy. The ratio of NO/NO2 is an indicator to distinguish between energetic and non-energetic materials.
The infrared real-time temperature measure by a PbSe sensor with high spatial resolution via aspheric optics has been exploited to control temperature-sensitive material microprocessing. Applications in the range from 370 K to 800 K has been discussed.
A fiber coupled LIBS system is used for detection of mines and explosives. Laser excitation at 1.5 mum is preferred to generate LIBS signals using an Er:glass microchip laser as seed laser for an Yb:Er fiber amplifier.
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