Phase-matched third-harmonic generation in mercury-(I)-chloride

摘要

Using phase-matched third-harmonic generation we determine the effective nonlinear susceptibilities in Hg_(2)Cl_(2) (Calomel) to |χ_(eff,I)~((3))|=4.5×10~(-22) m~(2)V~(-2) and |χ_(eff,II)~((3))|=9.7×10~(-22)m~(2)V~(-2) for type I and type II phase matching, respectively. The type III phase matching uses the same tensor components as type I and is deduced to be |χ_(eff,III)~((3))|approx=1.5×10~(-22)m~(2)V~(-2). The effective third-order susceptibilities of Hg_(2)Cl_(2) are two orders of magnitude higher than those of CaCO_(3), and the tensor components χ_(11) ~(-3)χ_(18) exceed the components of ADP by a factor of 5. These measurements demonstrate that Calomel might be a promising material to be used for nonlinear optical devices.