Author:
Kawamori Taiki,Schunemann Peter G.,Gruzdev Vitaly,Vodopyanov Konstantin L.
Abstract
We report multiphoton absorption (MPA) and pulse-length-dependent nonlinear absorption in four mid-infrared crystals. While MPA order varied following crystals’ bandgaps, generated free carriers by MPA contributed considerably to the total absorption even at 30-fs durations.