Lower frequency region mid-infrared spectroscopy by chirped pulse upconversion

Abstract

UV/visible pump, mid-IR probe spectroscopy measurements based on the chirped upconversion method were expanded to the frequency region below 1800cm-1 with the nonlinear optical crystal AgGaGeS4. Pump-probe experiments were demonstrated with GaAs and the photoreceptor protein Slr1694. © Owned by the authors, published by EDP Sciences, 2013.