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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.
This paper deals with the microstructure of the generated crystals in borate glass by femtosecond laser irradiation, Raman spectroscopy was used to study the distribution of the two phases of barium metaborate crystals produced.
The which-way information and interference visibility in a temporal version of double- and triple-slit experiments with attosecond electron wave packets generated by a soft X-ray pulse train can be controlled by a phase-stabilized laser pulse.
When the laser field consisting of sub-10-fs fundamental and its second harmonic was used for high harmonic generation, a continuum centered at 30 nm with a spectral bandwidth of 8 nm was obtained with an energy of 10 nJ.
We suggest a new efficient method of generation of intense (micro-J) short (fs-ns) THz pulses via coherent scattering of infrared radiation in atomic and molecular gases (f.e. Rb, methanol, and others) at room temperature.
The height, position, and even spacing of peaks in stepwise and direct multiphoton ionization spectra can be coherently controlled through the time delay or relative phase of two ultrashort laser pulses.
We demonstrate pulse shaping and temporal superresolution for few-cycle pulses. A reduction of the FWHM pulse width down to 3.7 fs has been achieved well below the transform limit of 4.5 fs.
We demonstrate that microbubbles generated through optical breakdown in tissue phantoms or individual cells are controllable with laser parameters. The controlled microbubbles can be used as an acoustically detectable agent for diagnostic and therapeutic applications.
We present results in a comprehensive analysis of gain shaping from Nd:glass amplifiers in an effort to generate near 100 fs pulses in chirped pulse amplification. We discuss relative gain balance between the two media.
Ultrafast-laser pulsetrain-burst processing (microsecond bursts at 100 MHz) is an option for fluence-delivery which leads to exceptional characteristics of morphology and processing-rates; we describe the background science and application to mitigation of high-power laser-induced damage.
Periodic nanoripples of tungsten on sapphire were grown using linearly-polarized femtosecond laser. The ripple orientation was found parallel to laser polarization. By scanning the substrate, we demonstrated tungsten grating with periodicity around 150 nm.
We introduce the notion of temporal superresolution for ultrashort pulses, by analogy with the well-known method of optical superresolution. Without spectral width modification we shape a pulse into a central peak of duration well below the Fourier limited.
We observed the momentum distributions of protons ejected from water molecule in intense sub-10-fs laser pulses. We found that the peak position of protons generated through non-sequential ionization is insensitive to the pulse duration.
The feasibility of using femtosecond laser micro-machining to create Gallium Arsenide (GaAs) quasi-phasematched devices from single GaAs wafers is investigated. We describe machining of the structure and details of the machining quality achievable in GaAs.
We present a quantitative analysis of self-arranged sub-wavelength structures created by femtosecond laser micromachining in silica. From the spatial correlation we calculate the periods of the structures versus laser energy and wavelength, and translation speed.
We demonstrate possibility of multi-MeV electron acceleration and ultra-short electron bunch formation in the most basic ldquotransverserdquo geometry of an electron beam and tightly focused laser beam whereby the beams propagate normally to each other.
Two temporally separated ultrashort pulses are interfered spectrally to obtain two-dimensional phase distribution of plasma waves generated by a terawatt laser. This technique allows micron-scale resolution in space with 14-fs time resolution.
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