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Ionization yields of C+n (n<6) from ionization of methane, butane, and octane are measured from 1013W/cm2 to 1016W/cm2. As one reaches 1016 W/cm2 the molecular response becomes atomic-like.
Photoelectron angular distributions were measured for Argon atoms at an intensity of 5??1018 W/cm2. It was found that the isotropy increased with intensity and that lower kinetic energy photoelectrons were more isotropic.
Entangled biphotons propagating through a turbulent medium are studied. We analyze the dependence of the transverse position-momentum entanglement of the photons on coherence diameter by taking a quadratic approximation to the wave-structure function.
Laser cooling in optical solids can lead to the realization of all-solid state cryocoolers. We present new results on Yb- and Tm-doped glasses and crystals and describe progress toward achieving net cooling in GaAs heterostructures.
The polarization and lattice dynamics in a metal/ferroelectric/metal nanolayer system is analyzed by femtosecond x-ray diffraction. Optically induced giant stress in the metal layers can switch off the ferroelectric polarization within 2 ps.
We have experimentally demonstrated a compact and efficient source of entangled photon pairs by using intra-cavity four wave mixing (FWM) in dual-wavelength Erbium doped fiber ring laser for the application in quantum key distribution systems.
We observed the lasing emission intensity oscillates with wavelength in polymer microstadium lasers.sss Our simulation results indicate that such oscillation is coming from the wave interference induced quality factor changes in chaotic system.
A single-wall carbon nanotube attached to an AFM probe is used for near-field optical imaging of 20 nm diameter fluorescent spheres and 5 nm diameter CdSe quantum dots.
We investigate experimentally and numerically resonant whispering gallery modes of billiard-type optical resonators with rational caustics. Measurements observe distinct families and asymmetric emission; simulations highlight novel inner higher-periodic orbits for microcavity laser and CQED applications.
A model for a discrete negative refractive index slab lens is used to evaluate the impact of granularity on image resolution, in particular, on the evanescent eld transfer function.
Quantum parity gates that use weak nonlinearity between single photons and intense coherent pulses are analyzed using a continuous-time model for cross-phase modulation. An inevitable phase noise is shown to degrade gate fidelity.
Arrays of silver nano-strips reveal negative effective permeabilities of -1 and -1.7 at 770 nm and 725 nm. We show that lower silver deposition rate results in stronger magnetic resonances.
Surface plasmon polaritons?? (SPPs) and composite diffracted evanescent waves?? (CDEWs) role in enhanced optical transmission are reviewed experimentally, via numerical modeling, and theoretically. All results support involvement of SPPs and contradict the existence of CDEWs.
We report experimental demonstration of strong-coupling in a cavity QED system, in which nitrogen vacancy centers in diamond nanocrystals are coupled to whispering gallery modes in a deformed silica microsphere.
We determine all the components of the surface susceptibility tensor and the separable part of the bulk tensor for optical second-harmonic generation in centrosymmetric and isotropic glass and calibrate the results against quartz crystal.
Second order nonlinear effects, such as second harmonic generation and parametric amplification, can be dramatically enhanced in microring resonator structures. The quasi-phase-matching is achieved based on the position dependence of polarization inside the ring resonator.
We have studied numerically and experimentally the linear diffraction and trapping of light at the hetero-interface between two different 1D AlGaAs waveguide arrays. A new ??breather?? state guided by the interface was observed.
We observed both ??8ns negative and 21ns positive delays in the optical pulse propagation through a microsphere-fiber system on the under and over coupling conditions, respectively, which are explained by a directional coupling theory.
We report difference frequency generation of THz waves from collinearly phase-matched, periodically poled lithium niobate crystals. Transform-limited THz-wave pulses with a wavelength range between 190210 ??m were generated at a kHz repetition rate.
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