We present a two-step two-frequency up-conversion (TSTF-UC) fluorescent material based crossed-beam display (CBD) apparatus. 3D voxels are addressed by two IR laser beams, which are driven by fast acousto-optic light deflectors (AOLD). The compact scanning system can cover a display volume of 100mmx100mmx100mm. Initial demonstration was carried out with a piece of 0.5-mol % Er3+-doped ZBLAN glass (23mmx23mmx17mm). It was found that the 3D image brightness dropped dramatically when refresh rate was increased. Also “ghost” voxels appeared with increasing refresh rate. A simplified rate-equation analysis was performed to address the issues.
The deperturbation analysis of ReN and nonadiabatic dissociation dynamics of BrCl and BrNO are reported. In the case of ReN, couplings between different electronic states changes apparent molecular properties such as rotational constants and excited state lifetimes. An experimental approach which enabled us to separated the contributions to the mixed states from specified energies and the spin-orbit branching ratio was measured as a function of the excitation energy. The correlation of the spin-orbit states of the photofragments was established. Such observations enabled us to establish nonadiabatic dissociation mechanisms. In both the spectroscopy and dissociation dynamics studies, the coupling between the nuclear and electronic degrees of freedom was investigated.
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