Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Itakura, Ryuji; Kumada, Takayuki; Nakano, Motoyoshi*; Akagi, Hiroshi
no journal, ,
When solid material is irradiated with an intense laser pulse, a number of electrons are excited to move freely. If the density of free electrons in the solid exceeds the critical density, the excited solid exhibits high reflectivity as a plasma mirror. In order to monitor electronic excitation dynamics, we have developed a time-resolved reflection spectrometer in the VUV range. Using an algorithm of frequency-resolved optical gating, we can obtain the time-resolved reflectivity of fused silica irradiated with an intense NIR pulse as well as the temporal waveform of a VUV probe pulse.
Yokoyama, Atsushi
no journal, ,
Bustard et al. proposed a technique for molecular alignment and orientation named a hybrid Raman scattering technique, in which a weak, linearly polarized short pump pulse creates a rotational coherence, and then a circularly polarized amplification pulse enhances the rotational coherence by transient stimulated Raman scattering. We simulate the degree of alignment for N
by solving time-dependent Schr
dinger equations and examined the possibility of the enhancement by this technique. The degree of alignment is enhanced, when right-circularly polarized photons scatters to left-circularly polarized photon. On the other hand, it is suppressed when left-circularly polarized photons scatters to right-circularly polarized photon.