The ionization rates and subsequent electron dynamics for laser-induced plasma channels are measured for the noble gas series He, Ne, Ar, Kr, and Xe at 1.0 atm. The cw fluorescence emission increases superlinearly in the series from He to Xe in agreement with Ammosov-Delone-Krainov tunnel ionization calculations. The electron temperature after laser-induced plasma formation, measured by four-wa...

Synopsis: The interference of attosecond electron wavepackets, created by high harmonic and femtosecond laser pulses, is measured. The first electron wavepacket is generated by direct ionization of He, and the second one by the two step process of resonant excitation by the attosecond high harmonic pulse and subsequent ionization by the laser pulse. The amplitude and phase retrieved from the in...

In 1960, Theodore H. Maiman, of the Hughes Aircraft Company, successfully operated the first device to generate an intense beam of highly coherent monochromatic radiation. He called his device a laser for light amplification by the stimulated emission of radiation. The laser has become ubiquitous, with literally hundreds of uses ranging from optical surgery to precision machining. Lecturers use...

A gaseous Bose-Einstein condensate irradiated by a far off-resonance laser has long-range interatomic correlations caused by laser-induced dipole-dipole interactions. These correlations, which are tunable via the laser intensity and frequency, can produce a "roton" minimum in the excitation spectrum--behavior reminiscent of the strongly correlated superfluid liquid He II.

We describe a four-frame picosecond green laser interferometer developed at the Neptune Laboratory at UCLA. This diagnostic is applied for measuring the dynamics of CO2 laser produced plasmas in a He gas jet. An example of results of the modification of the plasma density profile by the radiation pressure of the laser pulse is presented.

H-like and He-like resonantly photo-pumped laser schemes were proposed for producing X-ray lasers nearly four decades ago. However, demonstrating these schemes in the laboratory has proven to be elusive. One major challenge has been the difficulty of finding an adequate resonance between a strong pump line and a line in the laser plasma that drives the laser transition. After finding a good res...

introduction: the purpose of this case report is to analyze the results of vestibuleplasty around an over-denture based on dental implants to determine the evidence on the effectiveness of laser-assisted surgery and soft tissue management in implant dentistry. case report: the patient in this case report was a 57 year- old male who was completely edentulous, with a mandibular over denture based...

case presentation the patient was a 45-year-old male with t8 complete paraplegia; he had developed severe pressure ulcer. the authors used lllt as a complementary treatment. they used 980 nm, continuous 6 j/cm2 for margins and 655 nm, continuous 1.8 j/cm2 for bed of the ulcer, along with intravascular laser therapy. after 24 sessions of lllt and z-plasty surgery, the ulcer healed completely. co...