Influence of the laser wavelength on the threshold of plasma formation as a result of irradiation of opaque materials

Abstract

PACS. 78.30G -Infrared and Raman spectra in inorganic crystals. PACS. 63.20P -Localized modes. PACS. 66.30H -Self-diffusion and ionic conduction in nonmetals.Abstract. -Far-IR static-electric-field experiments on KI : Ag+ reveal that the field-induced frequency shifts for the <(pocket,, vibrational gap modes are nearly two orders of magnitude smaller than the corresponding shifts measured for the low-frequency resonant modes. When combined with previously measured stress shifts and a quasi-harmonic perturbed shell-model calculation, these results firmly establish that the silver ion has a significant quadrupolar deformability, which has been proposed to play an important role in the dynamics of the silver ion in other systems.